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es-toolkit

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A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.

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import { identity } from '../../function/identity.mjs'; import { range } from '../../math/range.mjs'; import { isArrayLike } from '../predicate/isArrayLike.mjs'; function forEach(collection, callback = identity) { if (!collection) { return collection; } const keys = isArrayLike(collection) || Array.isArray(collection) ? range(0, collection.length) : Object.keys(collection); for (let i = 0; i < keys.length; i++) { const key = keys[i]; const value = collection[key]; const result = callback(value, key, collection); if (result === false) { break; } } return collection; } export { forEach };