Bump to v3.0.0.

array/flatten.js

@@ -0,0 +1,32 @@
+define(['../internal/baseFlatten', '../internal/isIterateeCall'], function(baseFlatten, isIterateeCall) {
+
+  /**
+   * Flattens a nested array. If `isDeep` is `true` the array is recursively
+   * flattened, otherwise it is only flattened a single level.
+   *
+   * @static
+   * @memberOf _
+   * @category Array
+   * @param {Array} array The array to flatten.
+   * @param {boolean} [isDeep] Specify a deep flatten.
+   * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
+   * @returns {Array} Returns the new flattened array.
+   * @example
+   *
+   * _.flatten([1, [2], [3, [[4]]]]);
+   * // => [1, 2, 3, [[4]]];
+   *
+   * // using `isDeep`
+   * _.flatten([1, [2], [3, [[4]]]], true);
+   * // => [1, 2, 3, 4];
+   */
+  function flatten(array, isDeep, guard) {
+    var length = array ? array.length : 0;
+    if (guard && isIterateeCall(array, isDeep, guard)) {
+      isDeep = false;
+    }
+    return length ? baseFlatten(array, isDeep) : [];
+  }
+
+  return flatten;
+});