15 lines
242 B
TypeScript
15 lines
242 B
TypeScript
// @declaration: true
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/*
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var n: number[];
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interface Array<T> {
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map<U>(callbackfn: (value: T, index: number, array: T[]) => U, thisArg?: any): U[];
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}
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interface String{
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length: number;
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}
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*/
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var lengths = ["a", "b", "c"].map(x => x.length);
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