Bump to v3.0.0.

collection/find.js

@@ -0,0 +1,57 @@
+import baseCallback from '../internal/baseCallback';
+import baseEach from '../internal/baseEach';
+import baseFind from '../internal/baseFind';
+import findIndex from '../array/findIndex';
+import isArray from '../lang/isArray';
+
+/**
+ * Iterates over elements of `collection`, returning the first element
+ * `predicate` returns truthy for. The predicate is bound to `thisArg` and
+ * invoked with three arguments; (value, index|key, collection).
+ *
+ * If a property name is provided for `predicate` the created "_.property"
+ * style callback returns the property value of the given element.
+ *
+ * If an object is provided for `predicate` the created "_.matches" style
+ * callback returns `true` for elements that have the properties of the given
+ * object, else `false`.
+ *
+ * @static
+ * @memberOf _
+ * @alias detect
+ * @category Collection
+ * @param {Array|Object|string} collection The collection to search.
+ * @param {Function|Object|string} [predicate=_.identity] The function invoked
+ *  per iteration. If a property name or object is provided it is used to
+ *  create a "_.property" or "_.matches" style callback respectively.
+ * @param {*} [thisArg] The `this` binding of `predicate`.
+ * @returns {*} Returns the matched element, else `undefined`.
+ * @example
+ *
+ * var users = [
+ *   { 'user': 'barney',  'age': 36, 'active': false },
+ *   { 'user': 'fred',    'age': 40, 'active': true },
+ *   { 'user': 'pebbles', 'age': 1,  'active': false }
+ * ];
+ *
+ * _.result(_.find(users, function(chr) { return chr.age < 40; }), 'user');
+ * // => 'barney'
+ *
+ * // using the "_.matches" callback shorthand
+ * _.result(_.find(users, { 'age': 1 }), 'user');
+ * // => 'pebbles'
+ *
+ * // using the "_.property" callback shorthand
+ * _.result(_.find(users, 'active'), 'user');
+ * // => 'fred'
+ */
+function find(collection, predicate, thisArg) {
+  if (isArray(collection)) {
+    var index = findIndex(collection, predicate, thisArg);
+    return index > -1 ? collection[index] : undefined;
+  }
+  predicate = baseCallback(predicate, thisArg, 3);
+  return baseFind(collection, predicate, baseEach);
+}
+
+export default find;