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[Typescript] 31. Medium - Length of String

Compute the length of a string literal, which behaves like String#length. /* _____________ Your Code Here _____________ */ type LengthOfString<S extends string, ACC extends any[] = []> = S extends '' ? ACC['length']: S extends `

[Typescript Challenges] 28. Medium - Replace

Implement Replace<S, From, To> which replace the string From with To once in the given string S For example type replaced = Replace<'types are fun!', 'fun', 'awesome'> // expected to be 'types are awesome!�

[Typescript] 23. Medium - Promise.all

Type the function PromiseAll that accepts an array of PromiseLike objects, the returning value should be Promise<T> where T is the resolved result array. const promise1 = Promise.resolve(3); const promise2 = 42; const promise3 = new Promise<strin

[Typescript] 18. Medium - Deep Readonly

Implement a generic DeepReadonly<T> which make every parameter of an object - and its sub-objects recursively - readonly. You can assume that we are only dealing with Objects in this challenge. Arrays, Functions, Classes and so on do not need to be

[Typescript] 13. Easy - Unshift

Implement the type version of Array.unshift For example: type Result = Unshift<[1, 2], 0> // [0, 1, 2,]   /* _____________ Your Code Here _____________ */ type Unshift<T extends unknown[], U> = [ U, ...T ] /* _____________ Test Cases __

[Typescript] 14. Easy - Parameters

Implement the built-in Parameters generic without using it. For example: const foo = (arg1: string, arg2: number): void => {} type FunctionParamsType = MyParameters<typeof foo> // [arg1: string, arg2: number]   /* _____________ Your Code Here __

[Typescript Challenges] 10. Medium - Include

Implement the JavaScript Array.includes function in the type system. A type takes the two arguments. The output should be a boolean true or false. For example: type isPillarMen = Includes<['Kars', 'Esidisi', 'Wamuu', 

[Typescript Challenges] 4. Easy - First of Array

Implement a generic First<T> that takes an Array T and returns it's first element's type. type arr1 = ['a', 'b', 'c'] type arr2 = [3, 2, 1] type head1 = First<arr1> // expected to be 'a' type

[Typescript Challenges] 5. Easy - Length of Tuple

For given a tuple, you need create a generic Length, pick the length of the tuple For example: type tesla = ['tesla', 'model 3', 'model X', 'model Y'] type spaceX = ['FALCON 9', 'FALCON HEAVY', &

[Typescript Challenges] 6 Easy - Exclude

Implement the built-in Exclude<T, U> For example: type Result = MyExclude<'a' | 'b' | 'c', 'a'> // 'b' | 'c'   /* _____________ Your Code Here _____________ */ type MyExclude<T,

[Typescript Challenges] 7. Easy - Awaited

If we have a type which is wrapped type like Promise. How we can get a type which is inside the wrapped type? For example: if we have Promise<ExampleType> how to get ExampleType? type ExampleType = Promise<string> type Result = MyAwaited<E

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