TypeScript/src/lib/es2019.array.d.ts at main · unknownDev31/TypeScript · GitHub

Repository navigation

History

type FlatArray<Arr, Depth extends number> = {

"done": Arr,

"recur": Arr extends ReadonlyArray<infer InnerArr>

? FlatArray<InnerArr, [-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20][Depth]>

: Arr

}[Depth extends -1 ? "done" : "recur"];

interface ReadonlyArray<T> {

/**

* Calls a defined callback function on each element of an array. Then, flattens the result into

* a new array.

* This is identical to a map followed by flat with depth 1.

* @param callback A function that accepts up to three arguments. The flatMap method calls the

* callback function one time for each element in the array.

* @param thisArg An object to which the this keyword can refer in the callback function. If

* thisArg is omitted, undefined is used as the this value.

flatMap<U, This = undefined> (

callback: (this: This, value: T, index: number, array: T[]) => U | ReadonlyArray<U>,

thisArg?: This

): U[]

/**

* Returns a new array with all sub-array elements concatenated into it recursively up to the

* specified depth.

* @param depth The maximum recursion depth

flat<A, D extends number = 1>(

this: A,

depth?: D

): FlatArray<A, D>[]

}

interface Array<T> {

/**