随笔分类 - TypeScript
摘要：Implement the type version of Array.lastIndexOf, LastIndexOf<T, U> takes an Array T, any U and returns the index of the last U in Array T For example:
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摘要：Implement the type version of Array.join, Join<T, U> takes an Array T, string or number U and returns the Array T with U stitching up. type Res = Join
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摘要：Implement the type version of Array.indexOf, indexOf<T, U> takes an Array T, any U and returns the index of the first U in Array T. type Res = IndexOf
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摘要：Implement the type version of Math.trunc, which takes string or number and returns the integer part of a number by removing any fractional digits. For
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摘要：Implement the type version of Lodash.without, Without<T, U> takes an Array T, number or array U and returns an Array without the elements of U. type R
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摘要：Implement TrimRight<T> which takes an exact string type and returns a new string with the whitespace ending removed. For example: type Trimed = TrimRi
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摘要：Fill, a common JavaScript function, now let us implement it with types. Fill<T, N, Start?, End?>, as you can see,Fill accepts four types of parameters
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摘要：https://www.typescriptlang.org/docs/handbook/modules.html#ambient-modules Example for declare node.js "url" & "path" module: node.d.ts declare module
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摘要：https://www.typescriptlang.org/docs/handbook/modules.html#export--and-import--require When you export using `export = ` let numberRegexp = /^[0-9]+$/;
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摘要：Do you know lodash? Chunk is a very useful function in it, now let's implement it. Chunk<T, N> accepts two required type parameters, the T must be a t
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摘要：You might have some changes locally for 3rd party library. For the local implementation, you need to modify the types in order to resolve IDE issue. W
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摘要：Implement a type IsTuple, which takes an input type T and returns whether T is tuple type. For example: type case1 = IsTuple<[number]> // true type ca
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摘要：In This Challenge, You should implement a type Zip<T, U>, T and U must be Tuple type exp = Zip<[1, 2], [true, false]> // expected to be [[1, true], [2
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摘要：Implement type AllCombinations<S> that return all combinations of strings which use characters from S at most once. For example: type AllCombinations_
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摘要：In This Challenge, You should implement a type GreaterThan<T, U> like T > U Negative numbers do not need to be considered. For example GreaterThan<2,
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摘要：You can do some really, really neat stuff with assertion functions inside classes. Here, we assert that the user is logged in and get proper inference
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摘要：Implement a generic Fibonacci<T> that takes a number T and returns its corresponding Fibonacci number. The sequence starts: 1, 1, 2, 3, 5, 8, 13, 21,
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摘要：Implement the type of just-flip-object. Examples: Flip<{ a: "x", b: "y", c: "z" }>; // {x: 'a', y: 'b', z: 'c'} Flip<{ a: 1, b: 2, c: 3 }>; // {1: 'a'
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摘要：From T, pick a set of properties whose type are not assignable to U. For Example type OmitBoolean = OmitByType<{ name: string count: number isReadonly
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摘要：Implement the type version of binary tree inorder traversal. For example: const tree1 = { val: 1, left: null, right: { val: 2, left: { val: 3, left: n
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