8 lines
347 B
TypeScript
8 lines
347 B
TypeScript
interface Array<T> {
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reduce(callbackfn: (previousValue: T, currentValue: T, currentIndex: number, array: T[]) => T,
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initialValue?: T): T;
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reduce<U>(callbackfn: (previousValue: U, currentValue: T, currentIndex: number, array: T[]) => U,
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initialValue: U): U;
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}
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var a: Array<string>;
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var r5 = a.reduce((x, y) => x + y); |