base on Collection of TypeScript type challenges with online judge <p align='center'> <img src='./screenshots/logo.svg' width='400'/> </p> <p align='center'>Collection of TypeScript type challenges</p> <p align='center'> <a href='https://discord.gg/UgKBCq9'> <img src='https://img.shields.io/badge/-Discord-yellowgreen?logo=discord&logoColor=white&color=7289da'/> </a> <a href='https://www.typescriptlang.org/play?install-plugin=%40type-challenges%2Fplayground-plugin'> <img src='https://img.shields.io/badge/Playground-143?logo=typescript&color=3178C6&logoColor=fff' /> </a> </p> <br> <p align='center'> English | <a href='./README.zh-CN.md'>简体中文</a> | <a href='./README.ja.md'>日本語</a> | <a href='./README.ko.md'>한국어</a> | <a href='./README.pt-BR.md'>Português</a> </p> ## Intro <p align='center'> <del><em>by the power of TypeScript's well-known <a href="https://github.com/microsoft/TypeScript/issues/14833">Turing Completed</a> type system</em></del> </p> High-quality types can help improve projects' maintainability while avoiding potential bugs. This project is aimed at helping you better understand how the type system works, writing your own utilities, or just having fun with the challenges. We are also trying to form a community where you can ask questions and get answers you have faced in the real world - they may become part of the challenges! You can also use some existing type utility libraries such as [type-fest](https://github.com/sindresorhus/type-fest). There are also some stale packages (not actively maintained) that you could reference, like [utility-types](https://github.com/piotrwitek/utility-types), [ts-toolbelt](https://github.com/millsp/ts-toolbelt), [SimplyTyped](https://github.com/andnp/SimplyTyped). ## Challenges > Click the following badges to see details of the challenges. > **Note**: Challenges work in the [strict mode](https://www.typescriptlang.org/tsconfig#strict). <br> <!--challenges-start--> <img src="https://img.shields.io/badge/warm--up-1-teal" alt="1"/><br><a href="./questions/00013-warm-hello-world/README.md" target="_blank"><img src="https://img.shields.io/badge/-13%E3%83%BBHello%20World-teal" alt="13・Hello World"/></a> <br><br><img src="https://img.shields.io/badge/easy-13-7aad0c" alt="13"/><br><a href="./questions/00004-easy-pick/README.md" target="_blank"><img src="https://img.shields.io/badge/-4%E3%83%BBPick-7aad0c" alt="4・Pick"/></a> <a href="./questions/00007-easy-readonly/README.md" target="_blank"><img src="https://img.shields.io/badge/-7%E3%83%BBReadonly-7aad0c" alt="7・Readonly"/></a> <a href="./questions/00011-easy-tuple-to-object/README.md" target="_blank"><img src="https://img.shields.io/badge/-11%E3%83%BBTuple%20to%20Object-7aad0c" alt="11・Tuple to Object"/></a> <a href="./questions/00014-easy-first/README.md" target="_blank"><img src="https://img.shields.io/badge/-14%E3%83%BBFirst%20of%20Array-7aad0c" alt="14・First of Array"/></a> <a href="./questions/00018-easy-tuple-length/README.md" target="_blank"><img src="https://img.shields.io/badge/-18%E3%83%BBLength%20of%20Tuple-7aad0c" alt="18・Length of Tuple"/></a> <a href="./questions/00043-easy-exclude/README.md" target="_blank"><img src="https://img.shields.io/badge/-43%E3%83%BBExclude-7aad0c" alt="43・Exclude"/></a> <a href="./questions/00189-easy-awaited/README.md" target="_blank"><img src="https://img.shields.io/badge/-189%E3%83%BBAwaited-7aad0c" alt="189・Awaited"/></a> <a href="./questions/00268-easy-if/README.md" target="_blank"><img src="https://img.shields.io/badge/-268%E3%83%BBIf-7aad0c" alt="268・If"/></a> <a href="./questions/00533-easy-concat/README.md" target="_blank"><img src="https://img.shields.io/badge/-533%E3%83%BBConcat-7aad0c" alt="533・Concat"/></a> <a href="./questions/00898-easy-includes/README.md" target="_blank"><img src="https://img.shields.io/badge/-898%E3%83%BBIncludes-7aad0c" alt="898・Includes"/></a> <a href="./questions/03057-easy-push/README.md" target="_blank"><img src="https://img.shields.io/badge/-3057%E3%83%BBPush-7aad0c" alt="3057・Push"/></a> <a href="./questions/03060-easy-unshift/README.md" target="_blank"><img src="https://img.shields.io/badge/-3060%E3%83%BBUnshift-7aad0c" alt="3060・Unshift"/></a> <a href="./questions/03312-easy-parameters/README.md" target="_blank"><img src="https://img.shields.io/badge/-3312%E3%83%BBParameters-7aad0c" alt="3312・Parameters"/></a> <br><br><img src="https://img.shields.io/badge/medium-103-d9901a" alt="103"/><br><a href="./questions/00002-medium-return-type/README.md" target="_blank"><img src="https://img.shields.io/badge/-2%E3%83%BBGet%20Return%20Type-d9901a" alt="2・Get Return Type"/></a> <a href="./questions/00003-medium-omit/README.md" target="_blank"><img src="https://img.shields.io/badge/-3%E3%83%BBOmit-d9901a" alt="3・Omit"/></a> <a href="./questions/00008-medium-readonly-2/README.md" target="_blank"><img src="https://img.shields.io/badge/-8%E3%83%BBReadonly%202-d9901a" alt="8・Readonly 2"/></a> <a href="./questions/00009-medium-deep-readonly/README.md" target="_blank"><img src="https://img.shields.io/badge/-9%E3%83%BBDeep%20Readonly-d9901a" alt="9・Deep Readonly"/></a> <a href="./questions/00010-medium-tuple-to-union/README.md" target="_blank"><img src="https://img.shields.io/badge/-10%E3%83%BBTuple%20to%20Union-d9901a" alt="10・Tuple to Union"/></a> <a href="./questions/00012-medium-chainable-options/README.md" target="_blank"><img 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src="https://img.shields.io/badge/-553%E3%83%BBDeep%20object%20to%20unique-de3d37" alt="553・Deep object to unique"/></a> <a href="./questions/00651-hard-length-of-string-2/README.md" target="_blank"><img src="https://img.shields.io/badge/-651%E3%83%BBLength%20of%20String%202-de3d37" alt="651・Length of String 2"/></a> <a href="./questions/00730-hard-union-to-tuple/README.md" target="_blank"><img src="https://img.shields.io/badge/-730%E3%83%BBUnion%20to%20Tuple-de3d37" alt="730・Union to Tuple"/></a> <a href="./questions/00847-hard-string-join/README.md" target="_blank"><img src="https://img.shields.io/badge/-847%E3%83%BBString%20Join-de3d37" alt="847・String Join"/></a> <a href="./questions/00956-hard-deeppick/README.md" target="_blank"><img src="https://img.shields.io/badge/-956%E3%83%BBDeepPick-de3d37" alt="956・DeepPick"/></a> <a href="./questions/01290-hard-pinia/README.md" target="_blank"><img src="https://img.shields.io/badge/-1290%E3%83%BBPinia-de3d37" alt="1290・Pinia"/></a> <a 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target="_blank"><img src="https://img.shields.io/badge/-925%E3%83%BBAssert%20Array%20Index-b11b8d" alt="925・Assert Array Index"/></a> <a href="./questions/06228-extreme-json-parser/README.md" target="_blank"><img src="https://img.shields.io/badge/-6228%E3%83%BBJSON%20Parser-b11b8d" alt="6228・JSON Parser"/></a> <a href="./questions/07561-extreme-subtract/README.md" target="_blank"><img src="https://img.shields.io/badge/-7561%E3%83%BBSubtract-b11b8d" alt="7561・Subtract"/></a> <a href="./questions/31447-extreme-countreversepairs/README.md" target="_blank"><img src="https://img.shields.io/badge/-31447%E3%83%BBCountReversePairs-b11b8d" alt="31447・CountReversePairs"/></a> <a href="./questions/31997-extreme-parameter-intersection/README.md" target="_blank"><img src="https://img.shields.io/badge/-31997%E3%83%BBParameter%20Intersection-b11b8d" alt="31997・Parameter Intersection"/></a> <a href="./questions/33345-extreme-dynamic-route/README.md" target="_blank"><img 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src="https://img.shields.io/badge/-545%E3%83%BBprintf-de3d37" alt="545・printf"/></a> <a href="./questions/00651-hard-length-of-string-2/README.md" target="_blank"><img src="https://img.shields.io/badge/-651%E3%83%BBLength%20of%20String%202-de3d37" alt="651・Length of String 2"/></a> <a href="./questions/02059-hard-drop-string/README.md" target="_blank"><img src="https://img.shields.io/badge/-2059%E3%83%BBDrop%20String-de3d37" alt="2059・Drop String"/></a> <a href="./questions/19458-hard-snakecase/README.md" target="_blank"><img src="https://img.shields.io/badge/-19458%E3%83%BBSnakeCase-de3d37" alt="19458・SnakeCase"/></a> <a href="./questions/25747-hard-isnegativenumber/README.md" target="_blank"><img src="https://img.shields.io/badge/-25747%E3%83%BBIsNegativeNumber-de3d37" alt="25747・IsNegativeNumber"/></a> <a href="./questions/00151-extreme-query-string-parser/README.md" target="_blank"><img src="https://img.shields.io/badge/-151%E3%83%BBQuery%20String%20Parser-b11b8d" alt="151・Query String Parser"/></a> <a href="./questions/00274-extreme-integers-comparator/README.md" target="_blank"><img src="https://img.shields.io/badge/-274%E3%83%BBIntegers%20Comparator-b11b8d" alt="274・Integers Comparator"/></a> <a href="./questions/00476-extreme-sum/README.md" target="_blank"><img src="https://img.shields.io/badge/-476%E3%83%BBSum-b11b8d" alt="476・Sum"/></a> <a href="./questions/00517-extreme-multiply/README.md" target="_blank"><img src="https://img.shields.io/badge/-517%E3%83%BBMultiply-b11b8d" alt="517・Multiply"/></a> <a href="./questions/06228-extreme-json-parser/README.md" target="_blank"><img src="https://img.shields.io/badge/-6228%E3%83%BBJSON%20Parser-b11b8d" alt="6228・JSON Parser"/></a> </td></tr><tr><td><img src="https://img.shields.io/badge/-%23this-999" alt="#this"/></td><td><a href="./questions/00006-hard-simple-vue/README.md" target="_blank"><img src="https://img.shields.io/badge/-6%E3%83%BBSimple%20Vue-de3d37" alt="6・Simple Vue"/></a> <a href="./questions/01290-hard-pinia/README.md" target="_blank"><img src="https://img.shields.io/badge/-1290%E3%83%BBPinia-de3d37" alt="1290・Pinia"/></a> </td></tr><tr><td><img src="https://img.shields.io/badge/-%23tuple-999" alt="#tuple"/></td><td><a href="./questions/00018-easy-tuple-length/README.md" target="_blank"><img src="https://img.shields.io/badge/-18%E3%83%BBLength%20of%20Tuple-7aad0c" alt="18・Length of Tuple"/></a> <a href="./questions/03312-easy-parameters/README.md" target="_blank"><img src="https://img.shields.io/badge/-3312%E3%83%BBParameters-7aad0c" alt="3312・Parameters"/></a> <a href="./questions/00010-medium-tuple-to-union/README.md" target="_blank"><img src="https://img.shields.io/badge/-10%E3%83%BBTuple%20to%20Union-d9901a" alt="10・Tuple to Union"/></a> <a href="./questions/03188-medium-tuple-to-nested-object/README.md" target="_blank"><img src="https://img.shields.io/badge/-3188%E3%83%BBTuple%20to%20Nested%20Object-d9901a" alt="3188・Tuple to Nested Object"/></a> <a href="./questions/03192-medium-reverse/README.md" target="_blank"><img src="https://img.shields.io/badge/-3192%E3%83%BBReverse-d9901a" alt="3192・Reverse"/></a> <a href="./questions/03326-medium-bem-style-string/README.md" target="_blank"><img src="https://img.shields.io/badge/-3326%E3%83%BBBEM%20style%20string-d9901a" alt="3326・BEM style string"/></a> <a href="./questions/04471-medium-zip/README.md" target="_blank"><img src="https://img.shields.io/badge/-4471%E3%83%BBZip-d9901a" alt="4471・Zip"/></a> <a href="./questions/04484-medium-istuple/README.md" target="_blank"><img src="https://img.shields.io/badge/-4484%E3%83%BBIsTuple-d9901a" alt="4484・IsTuple"/></a> <a href="./questions/04499-medium-chunk/README.md" target="_blank"><img src="https://img.shields.io/badge/-4499%E3%83%BBChunk-d9901a" alt="4499・Chunk"/></a> <a href="./questions/04518-medium-fill/README.md" target="_blank"><img src="https://img.shields.io/badge/-4518%E3%83%BBFill-d9901a" alt="4518・Fill"/></a> <a href="./questions/07544-medium-construct-tuple/README.md" target="_blank"><img src="https://img.shields.io/badge/-7544%E3%83%BBConstruct%20Tuple-d9901a" alt="7544・Construct Tuple"/></a> <a href="./questions/21220-medium-permutations-of-tuple/README.md" target="_blank"><img src="https://img.shields.io/badge/-21220%E3%83%BBPermutations%20of%20Tuple-d9901a" alt="21220・Permutations of Tuple"/></a> <a href="./questions/27133-medium-square/README.md" target="_blank"><img src="https://img.shields.io/badge/-27133%E3%83%BBSquare-d9901a" alt="27133・Square"/></a> <a href="./questions/27152-medium-triangular-number/README.md" target="_blank"><img src="https://img.shields.io/badge/-27152%E3%83%BBTriangular%20number-d9901a" alt="27152・Triangular number"/></a> <a href="./questions/00399-hard-tuple-filter/README.md" target="_blank"><img src="https://img.shields.io/badge/-399%E3%83%BBTuple%20Filter-de3d37" alt="399・Tuple Filter"/></a> <a href="./questions/00472-hard-tuple-to-enum-object/README.md" target="_blank"><img src="https://img.shields.io/badge/-472%E3%83%BBTuple%20to%20Enum%20Object-de3d37" alt="472・Tuple to Enum Object"/></a> <a href="./questions/00730-hard-union-to-tuple/README.md" target="_blank"><img src="https://img.shields.io/badge/-730%E3%83%BBUnion%20to%20Tuple-de3d37" alt="730・Union to Tuple"/></a> <a href="./questions/02822-hard-split/README.md" target="_blank"><img src="https://img.shields.io/badge/-2822%E3%83%BBSplit-de3d37" alt="2822・Split"/></a> <a href="./questions/30178-hard-unique-items/README.md" target="_blank"><img src="https://img.shields.io/badge/-30178%E3%83%BBUnique%20Items-de3d37" alt="30178・Unique Items"/></a> <a href="./questions/31797-hard-sudoku/README.md" target="_blank"><img src="https://img.shields.io/badge/-31797%E3%83%BBSudoku-de3d37" alt="31797・Sudoku"/></a> <a href="./questions/32427-hard-unbox/README.md" target="_blank"><img src="https://img.shields.io/badge/-32427%E3%83%BBUnbox-de3d37" alt="32427・Unbox"/></a> <a href="./questions/07561-extreme-subtract/README.md" target="_blank"><img src="https://img.shields.io/badge/-7561%E3%83%BBSubtract-b11b8d" alt="7561・Subtract"/></a> </td></tr><tr><td><img src="https://img.shields.io/badge/-%23union-999" alt="#union"/></td><td><a href="./questions/00004-easy-pick/README.md" target="_blank"><img src="https://img.shields.io/badge/-4%E3%83%BBPick-7aad0c" alt="4・Pick"/></a> <a href="./questions/00043-easy-exclude/README.md" target="_blank"><img src="https://img.shields.io/badge/-43%E3%83%BBExclude-7aad0c" alt="43・Exclude"/></a> <a href="./questions/00003-medium-omit/README.md" target="_blank"><img src="https://img.shields.io/badge/-3%E3%83%BBOmit-d9901a" alt="3・Omit"/></a> <a href="./questions/00010-medium-tuple-to-union/README.md" target="_blank"><img src="https://img.shields.io/badge/-10%E3%83%BBTuple%20to%20Union-d9901a" alt="10・Tuple to Union"/></a> <a href="./questions/00062-medium-type-lookup/README.md" target="_blank"><img src="https://img.shields.io/badge/-62%E3%83%BBType%20Lookup-d9901a" alt="62・Type Lookup"/></a> <a href="./questions/00296-medium-permutation/README.md" target="_blank"><img src="https://img.shields.io/badge/-296%E3%83%BBPermutation-d9901a" alt="296・Permutation"/></a> <a href="./questions/00531-medium-string-to-union/README.md" target="_blank"><img src="https://img.shields.io/badge/-531%E3%83%BBString%20to%20Union-d9901a" alt="531・String to Union"/></a> <a href="./questions/01042-medium-isnever/README.md" target="_blank"><img src="https://img.shields.io/badge/-1042%E3%83%BBIsNever-d9901a" alt="1042・IsNever"/></a> <a href="./questions/01097-medium-isunion/README.md" target="_blank"><img src="https://img.shields.io/badge/-1097%E3%83%BBIsUnion-d9901a" alt="1097・IsUnion"/></a> <a href="./questions/03326-medium-bem-style-string/README.md" target="_blank"><img src="https://img.shields.io/badge/-3326%E3%83%BBBEM%20style%20string-d9901a" alt="3326・BEM style string"/></a> <a href="./questions/04260-medium-nomiwase/README.md" target="_blank"><img src="https://img.shields.io/badge/-4260%E3%83%BBAllCombinations-d9901a" alt="4260・AllCombinations"/></a> <a href="./questions/05117-medium-without/README.md" target="_blank"><img src="https://img.shields.io/badge/-5117%E3%83%BBWithout-d9901a" alt="5117・Without"/></a> <a href="./questions/08987-medium-subsequence/README.md" target="_blank"><img src="https://img.shields.io/badge/-8987%E3%83%BBSubsequence-d9901a" alt="8987・Subsequence"/></a> <a href="./questions/09142-medium-checkrepeatedchars/README.md" target="_blank"><img src="https://img.shields.io/badge/-9142%E3%83%BBCheckRepeatedChars-d9901a" alt="9142・CheckRepeatedChars"/></a> <a href="./questions/21220-medium-permutations-of-tuple/README.md" target="_blank"><img src="https://img.shields.io/badge/-21220%E3%83%BBPermutations%20of%20Tuple-d9901a" alt="21220・Permutations of Tuple"/></a> <a href="./questions/27862-medium-cartesianproduct/README.md" target="_blank"><img src="https://img.shields.io/badge/-27862%E3%83%BBCartesianProduct-d9901a" alt="27862・CartesianProduct"/></a> <a href="./questions/27932-medium-mergeall/README.md" target="_blank"><img src="https://img.shields.io/badge/-27932%E3%83%BBMergeAll-d9901a" alt="27932・MergeAll"/></a> <a href="./questions/00730-hard-union-to-tuple/README.md" target="_blank"><img src="https://img.shields.io/badge/-730%E3%83%BBUnion%20to%20Tuple-de3d37" alt="730・Union to Tuple"/></a> <a href="./questions/01383-hard-camelize/README.md" target="_blank"><img src="https://img.shields.io/badge/-1383%E3%83%BBCamelize-de3d37" alt="1383・Camelize"/></a> <a href="./questions/05423-hard-intersection/README.md" target="_blank"><img src="https://img.shields.io/badge/-5423%E3%83%BBIntersection-de3d37" alt="5423・Intersection"/></a> <a href="./questions/31797-hard-sudoku/README.md" target="_blank"><img src="https://img.shields.io/badge/-31797%E3%83%BBSudoku-de3d37" alt="31797・Sudoku"/></a> </td></tr><tr><td><img src="https://img.shields.io/badge/-%23utils-999" alt="#utils"/></td><td><a href="./questions/00268-easy-if/README.md" target="_blank"><img src="https://img.shields.io/badge/-268%E3%83%BBIf-7aad0c" alt="268・If"/></a> <a href="./questions/01042-medium-isnever/README.md" target="_blank"><img src="https://img.shields.io/badge/-1042%E3%83%BBIsNever-d9901a" alt="1042・IsNever"/></a> <a href="./questions/05821-medium-maptypes/README.md" target="_blank"><img src="https://img.shields.io/badge/-5821%E3%83%BBMapTypes-d9901a" alt="5821・MapTypes"/></a> <a href="./questions/00055-hard-union-to-intersection/README.md" target="_blank"><img src="https://img.shields.io/badge/-55%E3%83%BBUnion%20to%20Intersection-de3d37" alt="55・Union to Intersection"/></a> <a href="./questions/00057-hard-get-required/README.md" target="_blank"><img src="https://img.shields.io/badge/-57%E3%83%BBGet%20Required-de3d37" alt="57・Get Required"/></a> <a href="./questions/00059-hard-get-optional/README.md" target="_blank"><img src="https://img.shields.io/badge/-59%E3%83%BBGet%20Optional-de3d37" alt="59・Get Optional"/></a> <a href="./questions/00089-hard-required-keys/README.md" target="_blank"><img src="https://img.shields.io/badge/-89%E3%83%BBRequired%20Keys-de3d37" alt="89・Required Keys"/></a> <a href="./questions/00090-hard-optional-keys/README.md" target="_blank"><img src="https://img.shields.io/badge/-90%E3%83%BBOptional%20Keys-de3d37" alt="90・Optional Keys"/></a> <a href="./questions/00223-hard-isany/README.md" target="_blank"><img src="https://img.shields.io/badge/-223%E3%83%BBIsAny-de3d37" alt="223・IsAny"/></a> <a href="./questions/00270-hard-typed-get/README.md" target="_blank"><img src="https://img.shields.io/badge/-270%E3%83%BBTyped%20Get-de3d37" alt="270・Typed Get"/></a> <a href="./questions/02828-hard-classpublickeys/README.md" target="_blank"><img src="https://img.shields.io/badge/-2828%E3%83%BBClassPublicKeys-de3d37" alt="2828・ClassPublicKeys"/></a> <a href="./questions/02857-hard-isrequiredkey/README.md" target="_blank"><img src="https://img.shields.io/badge/-2857%E3%83%BBIsRequiredKey-de3d37" alt="2857・IsRequiredKey"/></a> <a href="./questions/05181-hard-mutable-keys/README.md" target="_blank"><img src="https://img.shields.io/badge/-5181%E3%83%BBMutable%20Keys-de3d37" alt="5181・Mutable Keys"/></a> <a href="./questions/32427-hard-unbox/README.md" target="_blank"><img src="https://img.shields.io/badge/-32427%E3%83%BBUnbox-de3d37" alt="32427・Unbox"/></a> <a href="./questions/00005-extreme-readonly-keys/README.md" target="_blank"><img src="https://img.shields.io/badge/-5%E3%83%BBGet%20Readonly%20Keys-b11b8d" alt="5・Get Readonly Keys"/></a> </td></tr><tr><td><img src="https://img.shields.io/badge/-%23variadic-999" alt="#variadic"/></td><td><a href="./questions/31997-extreme-parameter-intersection/README.md" target="_blank"><img src="https://img.shields.io/badge/-31997%E3%83%BBParameter%20Intersection-b11b8d" alt="31997・Parameter Intersection"/></a> </td></tr><tr><td><img src="https://img.shields.io/badge/-%23vue-999" alt="#vue"/></td><td><a href="./questions/00006-hard-simple-vue/README.md" target="_blank"><img src="https://img.shields.io/badge/-6%E3%83%BBSimple%20Vue-de3d37" alt="6・Simple Vue"/></a> <a href="./questions/00213-hard-vue-basic-props/README.md" target="_blank"><img src="https://img.shields.io/badge/-213%E3%83%BBVue%20Basic%20Props-de3d37" alt="213・Vue Basic Props"/></a> <a href="./questions/01290-hard-pinia/README.md" target="_blank"><img src="https://img.shields.io/badge/-1290%E3%83%BBPinia-de3d37" alt="1290・Pinia"/></a> </td></tr><tr><td><code>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</code></td><td></td></tr></tbody></table></details><br><details><summary>By Plain Text</summary><br><h3>warm-up (1)</h3><ul><li><a href="./questions/00013-warm-hello-world/README.md" target="_blank">13・Hello World</a> </li></ul><h3>easy (13)</h3><ul><li><a href="./questions/00004-easy-pick/README.md" target="_blank">4・Pick</a> </li><li><a href="./questions/00007-easy-readonly/README.md" target="_blank">7・Readonly</a> </li><li><a href="./questions/00011-easy-tuple-to-object/README.md" target="_blank">11・Tuple to Object</a> </li><li><a href="./questions/00014-easy-first/README.md" target="_blank">14・First of Array</a> </li><li><a href="./questions/00018-easy-tuple-length/README.md" target="_blank">18・Length of Tuple</a> </li><li><a href="./questions/00043-easy-exclude/README.md" target="_blank">43・Exclude</a> </li><li><a href="./questions/00189-easy-awaited/README.md" target="_blank">189・Awaited</a> </li><li><a href="./questions/00268-easy-if/README.md" target="_blank">268・If</a> </li><li><a href="./questions/00533-easy-concat/README.md" target="_blank">533・Concat</a> </li><li><a href="./questions/00898-easy-includes/README.md" target="_blank">898・Includes</a> </li><li><a href="./questions/03057-easy-push/README.md" target="_blank">3057・Push</a> </li><li><a href="./questions/03060-easy-unshift/README.md" target="_blank">3060・Unshift</a> </li><li><a href="./questions/03312-easy-parameters/README.md" target="_blank">3312・Parameters</a> </li></ul><h3>medium (103)</h3><ul><li><a href="./questions/00002-medium-return-type/README.md" target="_blank">2・Get Return Type</a> </li><li><a href="./questions/00003-medium-omit/README.md" target="_blank">3・Omit</a> </li><li><a href="./questions/00008-medium-readonly-2/README.md" target="_blank">8・Readonly 2</a> </li><li><a href="./questions/00009-medium-deep-readonly/README.md" target="_blank">9・Deep Readonly</a> </li><li><a href="./questions/00010-medium-tuple-to-union/README.md" target="_blank">10・Tuple to Union</a> </li><li><a href="./questions/00012-medium-chainable-options/README.md" target="_blank">12・Chainable Options</a> </li><li><a href="./questions/00015-medium-last/README.md" target="_blank">15・Last of Array</a> </li><li><a href="./questions/00016-medium-pop/README.md" target="_blank">16・Pop</a> </li><li><a href="./questions/00020-medium-promise-all/README.md" target="_blank">20・Promise.all</a> </li><li><a href="./questions/00062-medium-type-lookup/README.md" target="_blank">62・Type Lookup</a> </li><li><a href="./questions/00106-medium-trimleft/README.md" target="_blank">106・Trim Left</a> </li><li><a href="./questions/00108-medium-trim/README.md" target="_blank">108・Trim</a> </li><li><a href="./questions/00110-medium-capitalize/README.md" target="_blank">110・Capitalize</a> </li><li><a href="./questions/00116-medium-replace/README.md" target="_blank">116・Replace</a> </li><li><a href="./questions/00119-medium-replaceall/README.md" target="_blank">119・ReplaceAll</a> </li><li><a href="./questions/00191-medium-append-argument/README.md" target="_blank">191・Append Argument</a> </li><li><a href="./questions/00296-medium-permutation/README.md" target="_blank">296・Permutation</a> </li><li><a href="./questions/00298-medium-length-of-string/README.md" target="_blank">298・Length of String</a> </li><li><a href="./questions/00459-medium-flatten/README.md" target="_blank">459・Flatten</a> </li><li><a href="./questions/00527-medium-append-to-object/README.md" target="_blank">527・Append to object</a> </li><li><a href="./questions/00529-medium-absolute/README.md" target="_blank">529・Absolute</a> </li><li><a href="./questions/00531-medium-string-to-union/README.md" target="_blank">531・String to Union</a> </li><li><a href="./questions/00599-medium-merge/README.md" target="_blank">599・Merge</a> </li><li><a href="./questions/00612-medium-kebabcase/README.md" target="_blank">612・KebabCase</a> </li><li><a href="./questions/00645-medium-diff/README.md" target="_blank">645・Diff</a> </li><li><a href="./questions/00949-medium-anyof/README.md" target="_blank">949・AnyOf</a> </li><li><a href="./questions/01042-medium-isnever/README.md" target="_blank">1042・IsNever</a> </li><li><a href="./questions/01097-medium-isunion/README.md" target="_blank">1097・IsUnion</a> </li><li><a href="./questions/01130-medium-replacekeys/README.md" target="_blank">1130・ReplaceKeys</a> </li><li><a href="./questions/01367-medium-remove-index-signature/README.md" target="_blank">1367・Remove Index Signature</a> </li><li><a href="./questions/01978-medium-percentage-parser/README.md" target="_blank">1978・Percentage Parser</a> </li><li><a href="./questions/02070-medium-drop-char/README.md" target="_blank">2070・Drop Char</a> </li><li><a href="./questions/02257-medium-minusone/README.md" target="_blank">2257・MinusOne</a> </li><li><a href="./questions/02595-medium-pickbytype/README.md" target="_blank">2595・PickByType</a> </li><li><a href="./questions/02688-medium-startswith/README.md" target="_blank">2688・StartsWith</a> </li><li><a href="./questions/02693-medium-endswith/README.md" target="_blank">2693・EndsWith</a> </li><li><a href="./questions/02757-medium-partialbykeys/README.md" target="_blank">2757・PartialByKeys</a> </li><li><a href="./questions/02759-medium-requiredbykeys/README.md" target="_blank">2759・RequiredByKeys</a> </li><li><a href="./questions/02793-medium-mutable/README.md" target="_blank">2793・Mutable</a> </li><li><a href="./questions/02852-medium-omitbytype/README.md" target="_blank">2852・OmitByType</a> </li><li><a href="./questions/02946-medium-objectentries/README.md" target="_blank">2946・ObjectEntries</a> </li><li><a href="./questions/03062-medium-shift/README.md" target="_blank">3062・Shift</a> </li><li><a href="./questions/03188-medium-tuple-to-nested-object/README.md" target="_blank">3188・Tuple to Nested Object</a> </li><li><a href="./questions/03192-medium-reverse/README.md" target="_blank">3192・Reverse</a> </li><li><a href="./questions/03196-medium-flip-arguments/README.md" target="_blank">3196・Flip Arguments</a> </li><li><a href="./questions/03243-medium-flattendepth/README.md" target="_blank">3243・FlattenDepth</a> </li><li><a href="./questions/03326-medium-bem-style-string/README.md" target="_blank">3326・BEM style string</a> </li><li><a href="./questions/03376-medium-inordertraversal/README.md" target="_blank">3376・InorderTraversal</a> </li><li><a href="./questions/04179-medium-flip/README.md" target="_blank">4179・Flip</a> </li><li><a href="./questions/04182-medium-fibonacci-sequence/README.md" target="_blank">4182・Fibonacci Sequence</a> </li><li><a href="./questions/04260-medium-nomiwase/README.md" target="_blank">4260・AllCombinations</a> </li><li><a href="./questions/04425-medium-greater-than/README.md" target="_blank">4425・Greater Than</a> </li><li><a href="./questions/04471-medium-zip/README.md" target="_blank">4471・Zip</a> </li><li><a href="./questions/04484-medium-istuple/README.md" target="_blank">4484・IsTuple</a> </li><li><a href="./questions/04499-medium-chunk/README.md" target="_blank">4499・Chunk</a> </li><li><a href="./questions/04518-medium-fill/README.md" target="_blank">4518・Fill</a> </li><li><a href="./questions/04803-medium-trim-right/README.md" target="_blank">4803・Trim Right</a> </li><li><a href="./questions/05117-medium-without/README.md" target="_blank">5117・Without</a> </li><li><a href="./questions/05140-medium-trunc/README.md" target="_blank">5140・Trunc</a> </li><li><a href="./questions/05153-medium-indexof/README.md" target="_blank">5153・IndexOf</a> </li><li><a href="./questions/05310-medium-join/README.md" target="_blank">5310・Join</a> </li><li><a href="./questions/05317-medium-lastindexof/README.md" target="_blank">5317・LastIndexOf</a> </li><li><a href="./questions/05360-medium-unique/README.md" target="_blank">5360・Unique</a> </li><li><a href="./questions/05821-medium-maptypes/README.md" target="_blank">5821・MapTypes</a> </li><li><a href="./questions/07544-medium-construct-tuple/README.md" target="_blank">7544・Construct Tuple</a> </li><li><a href="./questions/08640-medium-number-range/README.md" target="_blank">8640・Number Range</a> </li><li><a href="./questions/08767-medium-combination/README.md" target="_blank">8767・Combination</a> </li><li><a href="./questions/08987-medium-subsequence/README.md" target="_blank">8987・Subsequence</a> </li><li><a href="./questions/09142-medium-checkrepeatedchars/README.md" target="_blank">9142・CheckRepeatedChars</a> </li><li><a href="./questions/09286-medium-firstuniquecharindex/README.md" target="_blank">9286・FirstUniqueCharIndex</a> </li><li><a href="./questions/09616-medium-parse-url-params/README.md" target="_blank">9616・Parse URL Params</a> </li><li><a href="./questions/09896-medium-get-middle-element/README.md" target="_blank">9896・GetMiddleElement</a> </li><li><a href="./questions/09898-medium-zhao-chu-mu-biao-shu-zu-zhong-zhi-chu-xian-guo-yi-ci-de-yuan-su/README.md" target="_blank">9898・Appear only once</a> </li><li><a href="./questions/09989-medium-tong-ji-shu-zu-zhong-de-yuan-su-ge-shu/README.md" target="_blank">9989・Count Element Number To Object</a> </li><li><a href="./questions/10969-medium-integer/README.md" target="_blank">10969・Integer</a> </li><li><a href="./questions/16259-medium-to-primitive/README.md" target="_blank">16259・ToPrimitive</a> </li><li><a href="./questions/17973-medium-deepmutable/README.md" target="_blank">17973・DeepMutable</a> </li><li><a href="./questions/18142-medium-all/README.md" target="_blank">18142・All</a> </li><li><a href="./questions/18220-medium-filter/README.md" target="_blank">18220・Filter</a> </li><li><a href="./questions/21104-medium-findall/README.md" target="_blank">21104・FindAll</a> </li><li><a href="./questions/21106-medium-zu-he-jian-lei-xing-combination-key-type/README.md" target="_blank">21106・Combination key type</a> </li><li><a href="./questions/21220-medium-permutations-of-tuple/README.md" target="_blank">21220・Permutations of Tuple</a> </li><li><a href="./questions/25170-medium-replace-first/README.md" target="_blank">25170・Replace First</a> </li><li><a href="./questions/25270-medium-transpose/README.md" target="_blank">25270・Transpose</a> </li><li><a href="./questions/26401-medium-json-schema-to-typescript/README.md" target="_blank">26401・JSON Schema to TypeScript</a> </li><li><a href="./questions/27133-medium-square/README.md" target="_blank">27133・Square</a> </li><li><a href="./questions/27152-medium-triangular-number/README.md" target="_blank">27152・Triangular number</a> </li><li><a href="./questions/27862-medium-cartesianproduct/README.md" target="_blank">27862・CartesianProduct</a> </li><li><a href="./questions/27932-medium-mergeall/README.md" target="_blank">27932・MergeAll</a> </li><li><a href="./questions/27958-medium-checkrepeatedtuple/README.md" target="_blank">27958・CheckRepeatedTuple</a> </li><li><a href="./questions/28333-medium-public-type/README.md" target="_blank">28333・Public Type</a> </li><li><a href="./questions/29650-medium-extracttoobject/README.md" target="_blank">29650・ExtractToObject</a> </li><li><a href="./questions/29785-medium-deep-omit/README.md" target="_blank">29785・Deep Omit</a> </li><li><a href="./questions/30301-medium-isodd/README.md" target="_blank">30301・IsOdd</a> </li><li><a href="./questions/30430-medium-tower-of-hanoi/README.md" target="_blank">30430・Tower of hanoi</a> </li><li><a href="./questions/30958-medium-pascals-triangle/README.md" target="_blank">30958・Pascal's triangle</a> </li><li><a href="./questions/30970-medium-shitariteraru/README.md" target="_blank">30970・IsFixedStringLiteralType</a> </li><li><a href="./questions/34007-medium-compare-array-length/README.md" target="_blank">34007・Compare Array Length</a> </li><li><a href="./questions/34857-medium-defined-partial-record/README.md" target="_blank">34857・Defined Partial Record</a> </li><li><a href="./questions/35045-medium-longest-common-prefix/README.md" target="_blank">35045・Longest Common Prefix</a> </li><li><a href="./questions/35191-medium-trace/README.md" target="_blank">35191・Trace</a> </li><li><a href="./questions/35252-medium-isalphabet/README.md" target="_blank">35252・IsAlphabet</a> </li><li><a href="./questions/35991-medium-myuppercase/README.md" target="_blank">35991・MyUppercase</a> </li></ul><h3>hard (55)</h3><ul><li><a href="./questions/00006-hard-simple-vue/README.md" target="_blank">6・Simple Vue</a> </li><li><a href="./questions/00017-hard-currying-1/README.md" target="_blank">17・Currying 1</a> </li><li><a href="./questions/00055-hard-union-to-intersection/README.md" target="_blank">55・Union to Intersection</a> </li><li><a href="./questions/00057-hard-get-required/README.md" target="_blank">57・Get Required</a> </li><li><a href="./questions/00059-hard-get-optional/README.md" target="_blank">59・Get Optional</a> </li><li><a href="./questions/00089-hard-required-keys/README.md" target="_blank">89・Required Keys</a> </li><li><a href="./questions/00090-hard-optional-keys/README.md" target="_blank">90・Optional Keys</a> </li><li><a href="./questions/00112-hard-capitalizewords/README.md" target="_blank">112・Capitalize Words</a> </li><li><a href="./questions/00114-hard-camelcase/README.md" target="_blank">114・CamelCase</a> </li><li><a href="./questions/00147-hard-c-printf-parser/README.md" target="_blank">147・C-printf Parser</a> </li><li><a href="./questions/00213-hard-vue-basic-props/README.md" target="_blank">213・Vue Basic Props</a> </li><li><a href="./questions/00223-hard-isany/README.md" target="_blank">223・IsAny</a> </li><li><a href="./questions/00270-hard-typed-get/README.md" target="_blank">270・Typed Get</a> </li><li><a href="./questions/00300-hard-string-to-number/README.md" target="_blank">300・String to Number</a> </li><li><a href="./questions/00399-hard-tuple-filter/README.md" target="_blank">399・Tuple Filter</a> </li><li><a href="./questions/00472-hard-tuple-to-enum-object/README.md" target="_blank">472・Tuple to Enum Object</a> </li><li><a href="./questions/00545-hard-printf/README.md" target="_blank">545・printf</a> </li><li><a href="./questions/00553-hard-deep-object-to-unique/README.md" target="_blank">553・Deep object to unique</a> </li><li><a href="./questions/00651-hard-length-of-string-2/README.md" target="_blank">651・Length of String 2</a> </li><li><a href="./questions/00730-hard-union-to-tuple/README.md" target="_blank">730・Union to Tuple</a> </li><li><a href="./questions/00847-hard-string-join/README.md" target="_blank">847・String Join</a> </li><li><a href="./questions/00956-hard-deeppick/README.md" target="_blank">956・DeepPick</a> </li><li><a href="./questions/01290-hard-pinia/README.md" target="_blank">1290・Pinia</a> </li><li><a href="./questions/01383-hard-camelize/README.md" target="_blank">1383・Camelize</a> </li><li><a href="./questions/02059-hard-drop-string/README.md" target="_blank">2059・Drop String</a> </li><li><a href="./questions/02822-hard-split/README.md" target="_blank">2822・Split</a> </li><li><a href="./questions/02828-hard-classpublickeys/README.md" target="_blank">2828・ClassPublicKeys</a> </li><li><a href="./questions/02857-hard-isrequiredkey/README.md" target="_blank">2857・IsRequiredKey</a> </li><li><a href="./questions/02949-hard-objectfromentries/README.md" target="_blank">2949・ObjectFromEntries</a> </li><li><a href="./questions/04037-hard-ispalindrome/README.md" target="_blank">4037・IsPalindrome</a> </li><li><a href="./questions/05181-hard-mutable-keys/README.md" target="_blank">5181・Mutable Keys</a> </li><li><a href="./questions/05423-hard-intersection/README.md" target="_blank">5423・Intersection</a> </li><li><a href="./questions/06141-hard-binary-to-decimal/README.md" target="_blank">6141・Binary to Decimal</a> </li><li><a href="./questions/07258-hard-object-key-paths/README.md" target="_blank">7258・Object Key Paths</a> </li><li><a href="./questions/08804-hard-two-sum/README.md" target="_blank">8804・Two Sum</a> </li><li><a href="./questions/09155-hard-validdate/README.md" target="_blank">9155・ValidDate</a> </li><li><a href="./questions/09160-hard-assign/README.md" target="_blank">9160・Assign</a> </li><li><a href="./questions/09384-hard-maximum/README.md" target="_blank">9384・Maximum</a> </li><li><a href="./questions/09775-hard-capitalize-nest-object-keys/README.md" target="_blank">9775・Capitalize Nest Object Keys</a> </li><li><a href="./questions/13580-hard-replace-union/README.md" target="_blank">13580・Replace Union</a> </li><li><a href="./questions/14080-hard-fizzbuzz/README.md" target="_blank">14080・FizzBuzz</a> </li><li><a href="./questions/14188-hard-run-length-encoding/README.md" target="_blank">14188・Run-length encoding</a> </li><li><a href="./questions/15260-hard-tree-path-array/README.md" target="_blank">15260・Tree path array</a> </li><li><a href="./questions/19458-hard-snakecase/README.md" target="_blank">19458・SnakeCase</a> </li><li><a href="./questions/25747-hard-isnegativenumber/README.md" target="_blank">25747・IsNegativeNumber</a> </li><li><a href="./questions/28143-hard-optionalundefined/README.md" target="_blank">28143・OptionalUndefined</a> </li><li><a href="./questions/30178-hard-unique-items/README.md" target="_blank">30178・Unique Items</a> </li><li><a href="./questions/30575-hard-bitwisexor/README.md" target="_blank">30575・BitwiseXOR</a> </li><li><a href="./questions/31797-hard-sudoku/README.md" target="_blank">31797・Sudoku</a> </li><li><a href="./questions/31824-hard-length-of-string-3/README.md" target="_blank">31824・Length of String 3</a> </li><li><a href="./questions/32427-hard-unbox/README.md" target="_blank">32427・Unbox</a> </li><li><a href="./questions/32532-hard-binary-addition/README.md" target="_blank">32532・Binary Addition</a> </li><li><a href="./questions/33763-hard-union-to-object-from-key/README.md" target="_blank">33763・Union to Object from key</a> </li><li><a href="./questions/34286-hard-take-elements/README.md" target="_blank">34286・Take Elements</a> </li><li><a href="./questions/35314-hard-valid-sudoku/README.md" target="_blank">35314・Valid Sudoku</a> </li></ul><h3>extreme (17)</h3><ul><li><a href="./questions/00005-extreme-readonly-keys/README.md" target="_blank">5・Get Readonly Keys</a> </li><li><a href="./questions/00151-extreme-query-string-parser/README.md" target="_blank">151・Query String Parser</a> </li><li><a href="./questions/00216-extreme-slice/README.md" target="_blank">216・Slice</a> </li><li><a href="./questions/00274-extreme-integers-comparator/README.md" target="_blank">274・Integers Comparator</a> </li><li><a href="./questions/00462-extreme-currying-2/README.md" target="_blank">462・Currying 2</a> </li><li><a href="./questions/00476-extreme-sum/README.md" target="_blank">476・Sum</a> </li><li><a href="./questions/00517-extreme-multiply/README.md" target="_blank">517・Multiply</a> </li><li><a href="./questions/00697-extreme-tag/README.md" target="_blank">697・Tag</a> </li><li><a href="./questions/00734-extreme-inclusive-range/README.md" target="_blank">734・Inclusive Range</a> </li><li><a href="./questions/00741-extreme-sort/README.md" target="_blank">741・Sort</a> </li><li><a href="./questions/00869-extreme-distributeunions/README.md" target="_blank">869・DistributeUnions</a> </li><li><a href="./questions/00925-extreme-assert-array-index/README.md" target="_blank">925・Assert Array Index</a> </li><li><a href="./questions/06228-extreme-json-parser/README.md" target="_blank">6228・JSON Parser</a> </li><li><a href="./questions/07561-extreme-subtract/README.md" target="_blank">7561・Subtract</a> </li><li><a href="./questions/31447-extreme-countreversepairs/README.md" target="_blank">31447・CountReversePairs</a> </li><li><a href="./questions/31997-extreme-parameter-intersection/README.md" target="_blank">31997・Parameter Intersection</a> </li><li><a href="./questions/33345-extreme-dynamic-route/README.md" target="_blank">33345・Dynamic Route</a> </li></ul></details><br> <!--challenges-end--> > ✨ [Upcoming challenges](https://github.com/type-challenges/type-challenges/issues?q=is%3Aissue+is%3Aopen+label%3Anew-challenge) > 🔥 Start the challenge in [TypeScript Playground](https://www.typescriptlang.org/play?install-plugin=%40type-challenges%2Fplayground-plugin) > 🚀 Start the challenge locally in [your IDE or text editor with TypeScript language support](#play-locally) > ⚡️ Start the challenge in [VS Code Extension](https://marketplace.visualstudio.com/items?itemName=YRM.type-challenges) ## Recommended Readings ### Official - [The TypeScript Handbook](https://www.typescriptlang.org/docs/handbook/intro.html) - [Unions and Intersection Types](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#union-types) - [Literal Types](https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#literal-types) - [Utility Types](https://www.typescriptlang.org/docs/handbook/utility-types.html) - [Advanced Types](https://www.typescriptlang.org/docs/handbook/2/types-from-types.html) - [The New Handbook](https://github.com/microsoft/TypeScript-Website/tree/v2/packages/documentation/copy/en/handbook-v2) ### Articles - [Learn Advanced TypeScript Types](https://medium.com/free-code-camp/typescript-curry-ramda-types-f747e99744ab) - [The Art of Type Programming](https://mistlog.medium.com/the-art-of-type-programming-cfd933bdfff7) - [Type Query: jQuery Style Type Manipulation](https://mistlog.medium.com/type-query-jquery-style-type-manipulation-497ce26d93f) - [TypeScript Deep Dive](https://basarat.gitbook.io/typescript/) ### Talks - [Type Level Programming in Typescript](https://www.youtube.com/watch?reload=9&v=vGVvJuazs84) ### Projects / Solutions - [🎥 Video Explanations and Solutions for every challenge!](https://www.youtube.com/playlist?list=PLOlZuxYbPik180vcJfsAM6xHYLVxrEgHC) - [Type Challenges Solutions](https://github.com/ghaiklor/type-challenges-solutions) - [Type Gymnastics](https://github.com/g-plane/type-gymnastics) - [TypeType Examples](https://github.com/mistlog/typetype-examples) ### Books - [Effective TypeScript](https://effectivetypescript.com/) - [Learning TypeScript](https://www.learningtypescript.com/) - [TypeScript in 50 Lessons](https://typescript-book.com/) - [TypeScript Cookbook](https://typescript-cookbook.com/) ## How to Contribute There are several ways you can contribute to this project - Share your answers / solutions - Propose new challenges - Add more test cases to the existing challenges - Provide learning resources or ideas of how to solve challenges - Share the problems you have faced in real-world projects, regardless you having the solution or not - the community would help you as well - Help with others by discussion in issues - Contribute the infra of this project [TODOs.md](./TODOs.md) Just [open an issue](https://github.com/type-challenges/type-challenges/issues/new/choose) and choose the corresponding template. Thanks! ## Play Locally You can build the challenges and play locally using your preferred IDE or text editor with TypeScript language support. To do that, you will need the latest version of [Node.js](https://nodejs.org/) and [pnpm](https://pnpm.io/) installed. After cloning the repo, installed the dependencies by: ```bash pnpm install ``` Then and run the `generate` script: ```bash pnpm generate ``` It will prompt you to select the desired language, then you can find the generated challenges in the `./playground` folder. Later if you want to update playground while keeping your changes: ```bash pnpm generate --keep-changes ``` OR ```bash pnpm generate -K ``` ## Thanks This project was born from solving real-world types problem with [@hardfist](https://github.com/hardfist) and [@MeCKodo](https://github.com/MeCKodo). And great thanks to [@sinoon](https://github.com/sinoon) who contributed a lot while giving early feedback on this project. ### Inspired by - [piotrwitek/utility-types](https://github.com/piotrwitek/utility-types) - [psmyrdek/typescript-challenges](https://github.com/psmyrdek/typescript-challenges) - [andnp/SimplyTyped](https://github.com/andnp/SimplyTyped) ### [Contributors](https://github.com/type-challenges/type-challenges/graphs/contributors)  ## [Star History](https://github.com/type-challenges/type-challenges/stargazers) <picture> <source media="(prefers-color-scheme: dark)" srcset="https://api.star-history.com/svg?repos=type-challenges/type-challenges&type=Date&theme=dark" /> <source media="(prefers-color-scheme: light)" srcset="https://api.star-history.com/svg?repos=type-challenges/type-challenges&type=Date" /> <img alt="Star History Chart" src="https://api.star-history.com/svg?repos=type-challenges/type-challenges&type=Date" /> </picture> ## License MIT ", Assign "at most 3 tags" to the expected json: {"id":"2150","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"