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node_modules/lodash/iteratee.js

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+var baseClone = require('./_baseClone'),
+    baseIteratee = require('./_baseIteratee');
+
+/** Used to compose bitmasks for cloning. */
+var CLONE_DEEP_FLAG = 1;
+
+/**
+ * Creates a function that invokes `func` with the arguments of the created
+ * function. If `func` is a property name, the created function returns the
+ * property value for a given element. If `func` is an array or object, the
+ * created function returns `true` for elements that contain the equivalent
+ * source properties, otherwise it returns `false`.
+ *
+ * @static
+ * @since 4.0.0
+ * @memberOf _
+ * @category Util
+ * @param {*} [func=_.identity] The value to convert to a callback.
+ * @returns {Function} Returns the callback.
+ * @example
+ *
+ * var users = [
+ *   { 'user': 'barney', 'age': 36, 'active': true },
+ *   { 'user': 'fred',   'age': 40, 'active': false }
+ * ];
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
+ * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.filter(users, _.iteratee(['user', 'fred']));
+ * // => [{ 'user': 'fred', 'age': 40 }]
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.map(users, _.iteratee('user'));
+ * // => ['barney', 'fred']
+ *
+ * // Create custom iteratee shorthands.
+ * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
+ *   return !_.isRegExp(func) ? iteratee(func) : function(string) {
+ *     return func.test(string);
+ *   };
+ * });
+ *
+ * _.filter(['abc', 'def'], /ef/);
+ * // => ['def']
+ */
+function iteratee(func) {
+  return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
+}
+
+module.exports = iteratee;