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Merge pull request #10027 from maiermic/type-guards-in-Array.prototype.filter

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add Array.prototype.filter signature with type guard
This commit is contained in:
Mohamed Hegazy
2016-09-06 12:59:29 -07:00
committed by GitHub
parent 21736a1dbb dbd8dd5c88
commit a63c1c8ab2
1 changed files with 6 additions and 0 deletions
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src/lib/es5.d.ts
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@@ -1060,6 +1060,12 @@ interface ReadonlyArray<T> {
* @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
*/
map<U>(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => U, thisArg?: any): U[];
/**
* Returns the elements of an array that meet the condition specified in a callback function.
* @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
* @param thisArg An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.
*/
filter<S extends T>(callbackfn: (value: T, index: number, array: ReadonlyArray<T>) => value is S, thisArg?: any): S[];
/**
* Returns the elements of an array that meet the condition specified in a callback function.
* @param callbackfn A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.