Bump to v3.0.0.

lodash._baseflatten/index.js

@@ -0,0 +1,84 @@
+/**
+ * lodash 3.0.0 (Custom Build) <https://lodash.com/>
+ * Build: `lodash modern modularize exports="npm" -o ./`
+ * Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
+ * Based on Underscore.js 1.7.0 <http://underscorejs.org/LICENSE>
+ * Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+ * Available under MIT license <https://lodash.com/license>
+ */
+var isArguments = require('lodash.isarguments'),
+    isArray = require('lodash.isarray');
+
+/**
+ * Checks if `value` is object-like.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ */
+function isObjectLike(value) {
+  return (value && typeof value == 'object') || false;
+}
+
+/**
+ * Used as the maximum length of an array-like value.
+ * See the [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.max_safe_integer)
+ * for more details.
+ */
+var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
+
+/**
+ * The base implementation of `_.flatten` with added support for restricting
+ * flattening and specifying the start index.
+ *
+ * @private
+ * @param {Array} array The array to flatten.
+ * @param {boolean} [isDeep] Specify a deep flatten.
+ * @param {boolean} [isStrict] Restrict flattening to arrays and `arguments` objects.
+ * @param {number} [fromIndex=0] The index to start from.
+ * @returns {Array} Returns the new flattened array.
+ */
+function baseFlatten(array, isDeep, isStrict, fromIndex) {
+  var index = (fromIndex || 0) - 1,
+      length = array.length,
+      resIndex = -1,
+      result = [];
+
+  while (++index < length) {
+    var value = array[index];
+
+    if (isObjectLike(value) && isLength(value.length) && (isArray(value) || isArguments(value))) {
+      if (isDeep) {
+        // Recursively flatten arrays (susceptible to call stack limits).
+        value = baseFlatten(value, isDeep, isStrict);
+      }
+      var valIndex = -1,
+          valLength = value.length;
+
+      result.length += valLength;
+      while (++valIndex < valLength) {
+        result[++resIndex] = value[valIndex];
+      }
+    } else if (!isStrict) {
+      result[++resIndex] = value;
+    }
+  }
+  return result;
+}
+
+/**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This function is based on ES `ToLength`. See the
+ * [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
+ * for more details.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
+ */
+function isLength(value) {
+  return typeof value == 'number' && value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+}
+
+module.exports = baseFlatten;