Bump to v4.0.0.

isEqualWith.js

@@ -0,0 +1,44 @@
+define(['./internal/baseIsEqual'], function(baseIsEqual) {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /**
+   * This method is like `_.isEqual` except that it accepts `customizer` which is
+   * invoked to compare values. If `customizer` returns `undefined` comparisons are
+   * handled by the method instead. The `customizer` is invoked with up to seven arguments:
+   * (objValue, othValue [, index|key, object, other, stack]).
+   *
+   * @static
+   * @memberOf _
+   * @category Lang
+   * @param {*} value The value to compare.
+   * @param {*} other The other value to compare.
+   * @param {Function} [customizer] The function to customize comparisons.
+   * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+   * @example
+   *
+   * function isGreeting(value) {
+   *   return /^h(?:i|ello)$/.test(value);
+   * }
+   *
+   * function customizer(objValue, othValue) {
+   *   if (isGreeting(objValue) && isGreeting(othValue)) {
+   *     return true;
+   *   }
+   * }
+   *
+   * var array = ['hello', 'goodbye'];
+   * var other = ['hi', 'goodbye'];
+   *
+   * _.isEqualWith(array, other, customizer);
+   * // => true
+   */
+  function isEqualWith(value, other, customizer) {
+    customizer = typeof customizer == 'function' ? customizer : undefined;
+    var result = customizer ? customizer(value, other) : undefined;
+    return result === undefined ? baseIsEqual(value, other, customizer) : !!result;
+  }
+
+  return isEqualWith;
+});