es-toolkit/dist/compat/array/slice.mjs

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

import { isIterateeCall } from '../_internal/isIterateeCall.mjs';
import { isArrayLike } from '../predicate/isArrayLike.mjs';
import { toInteger } from '../util/toInteger.mjs';

function slice(array, start, end) {
    if (!isArrayLike(array)) {
        return [];
    }
    const length = array.length;
    if (end === undefined) {
        end = length;
    }
    else if (typeof end !== 'number' && isIterateeCall(array, start, end)) {
        start = 0;
        end = length;
    }
    start = toInteger(start);
    end = toInteger(end);
    if (start < 0) {
        start = Math.max(length + start, 0);
    }
    else {
        start = Math.min(start, length);
    }
    if (end < 0) {
        end = Math.max(length + end, 0);
    }
    else {
        end = Math.min(end, length);
    }
    const resultLength = Math.max(end - start, 0);
    const result = new Array(resultLength);
    for (let i = 0; i < resultLength; ++i) {
        result[i] = array[start + i];
    }
    return result;
}

export { slice };