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Viewing: toLength.js

var baseClamp = require('./_baseClamp'),
    toInteger = require('./toInteger');

/** Used as references for the maximum length and index of an array. */
var MAX_ARRAY_LENGTH = 4294967295;

/**
 * Converts `value` to an integer suitable for use as the length of an
 * array-like object.
 *
 * **Note:** This method is based on
 * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to convert.
 * @returns {number} Returns the converted integer.
 * @example
 *
 * _.toLength(3.2);
 * // => 3
 *
 * _.toLength(Number.MIN_VALUE);
 * // => 0
 *
 * _.toLength(Infinity);
 * // => 4294967295
 *
 * _.toLength('3.2');
 * // => 3
 */
function toLength(value) {
  return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
}

module.exports = toLength;

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