Bump to v4.0.0.

toLength.js

@@ -0,0 +1,36 @@
+define(['./internal/baseClamp', './toInteger'], function(baseClamp, 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-262/6.0/#sec-tolength).
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to convert.
+   * @return {number} Returns the converted integer.
+   * @example
+   *
+   * _.toLength(3);
+   * // => 3
+   *
+   * _.toLength(Number.MIN_VALUE);
+   * // => 0
+   *
+   * _.toLength(Infinity);
+   * // => 4294967295
+   *
+   * _.toLength('3');
+   * // => 3
+   */
+  function toLength(value) {
+    return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
+  }
+
+  return toLength;
+});