转换指定的字符串到小写。

Converts the specified string to uppercase.

Invokes the iterator function once for each item in obj collection, which can be either an object or an array. The iterator function is invoked with iterator(value, key), where value is the value of an object property or an array element and key is the object property key or array element index. Specifying a context for the function is optional.

Extends the destination object dst by copying all of the properties from the src object(s) to dst. You can specify multiple src objects.

A function that performs no operations. 这个函数在使用函数风格写代码时很有用。

     Function foo(callback) {
       var result = calculateResult();
       (callback || angular.noop)(result);
     }

A function that returns its first argument. This function is useful when writing code in the functional style.

检测引用是否未定义。

检测引用是否已定义。

检测引用是否为一个Object. Unlike typeof in JavaScript, nulls are not considered to be objects. Note that JavaScript arrays are objects.

检测引用是否是一个 String.

检测引用是否是一个 Number.

检测值是否为日期。

检测引用是否为一个Array.

检测引用是否是一个 Function.

检测引用是否为一个DOM元素（或是封装的jQuery元素）。

Creates a deep copy of source, which should be an object or an array.

Determines if two objects or two values are equivalent. Supports value types, regular expressions, arrays and objects.

Returns a function which calls function fn bound to self (self becomes the this for fn). You can supply optional args that are prebound to the function. This feature is also known as partial application, as distinguished from function currying.

Serializes input into a JSON-formatted string. Properties with leading $$ characters will be stripped since angular uses this notation internally.

反序列化JSON字符串。

Use this function to manually start up angular application.

Creates an injector function that can be used for retrieving services as well as for 依赖注入 (see 依赖注入).

Wraps a raw DOM element or HTML string as a jQuery element.

The angular.module is a global place for creating, registering and retrieving Angular modules. All modules (angular core or 3rd party) that should be available to an application must be registered using this mechanism.