lazzy.ts/consumers/sum.d.ts

Fast and lightweight library for lazy operations with iterable objects.

export declare function sum<T, R, N>(iterator: Iterator<T, R, N>, ...select: T extends number ? [] : [(value: T) => number]): number;
export declare function sumAsync<T, R, N>(iterator: AsyncIterator<T, R, N>, ...select: T extends number ? [] : [(value: T) => number]): Promise<number>;
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