Bump to v3.0.0.

lodash.isempty/index.js

@@ -0,0 +1,87 @@
+/**
+ * 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'),
+    isFunction = require('lodash.isfunction'),
+    isString = require('lodash.isstring'),
+    keys = require('lodash.keys');
+
+/**
+ * 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;
+
+/**
+ * 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;
+}
+
+/**
+ * Checks if `value` is empty. A value is considered empty unless it is an
+ * `arguments` object, array, string, or jQuery-like collection with a length
+ * greater than `0` or an object with own enumerable properties.
+ *
+ * @static
+ * @memberOf _
+ * @category Lang
+ * @param {Array|Object|string} value The value to inspect.
+ * @returns {boolean} Returns `true` if `value` is empty, else `false`.
+ * @example
+ *
+ * _.isEmpty(null);
+ * // => true
+ *
+ * _.isEmpty(true);
+ * // => true
+ *
+ * _.isEmpty(1);
+ * // => true
+ *
+ * _.isEmpty([1, 2, 3]);
+ * // => false
+ *
+ * _.isEmpty({ 'a': 1 });
+ * // => false
+ */
+function isEmpty(value) {
+  if (value == null) {
+    return true;
+  }
+  var length = value.length;
+  if (isLength(length) && (isArray(value) || isString(value) || isArguments(value) ||
+      (isObjectLike(value) && isFunction(value.splice)))) {
+    return !length;
+  }
+  return !keys(value).length;
+}
+
+module.exports = isEmpty;