parent scope

Lexical scopes are the scopes that have been formed at the time of lexical analysis. This time has been set to die. If a function is declared at the global level, her parent scope is the global scope. The scope of a function can only exist in a

The following small series will bring you a JavaScript function execution process. I think it is quite good. Now I will share it with you and give you a reference. Let's take a look at it with xiaobian. 1.Every JavaScript Function is an instance of

Lin Bingwen Evankaka Original works. Reprint please specify the source Http://blog.csdn.net/evankakaAbstract: This paper introduces the use of data sharing, inheritance and communication in controller in Angularjs.This tutorial uses the ANGULARJS

execution context (execution context, referred to as EC)Concept every time the controller arrives at the ECMAScript executable code, it enters an execution context. In JavaScript, EC is divided into three types: global level Code (Global execution

650) this.width=650; "Src=" http://images2015.cnblogs.com/blog/636325/201704/636325-20170412123508158-766265493. PNG "style=" margin:0px;padding:0px;border:0px; "/>Angularjs was born in 2009 and is used in many of our familiar Google apps, such as

What is Angularjs?Angularjs is a front-end JavaScript framework with Google support behind it. The framework was first released in 09 and subsequently developed rapidly, especially recently, with high prevalence. Unlike other frameworks, Angularjs

How to understand the scope of JS, closures, private variables, the This object concept?Let's start with a classic face test!Title: Create 10 tags, click time to pop up the corresponding serial numberThink about it, then open it. // think about

From how the browser compiles the JS code.I've been thinking for a long time, when we give the code to the browser, how the browser transforms the code into a vivid Web page. JS engine before executing our code, what the browser did to our code, the

First, the parsing sequence of JavaScriptThe code that we all understand is executed from top to bottom, but it's actually not. Let's take a look at the following code.1 alert (a); 2 var a = 1;If the execution order is from top to bottom, pops up a

LetIt is well known that the keyword declaring a variable is only var before ES6. var declaring a variable is either global or function-level, not block-level. varA=1; Console.log (a); //1Console.log (WINDOW.A);//1functionTest () {varb=2;

We know that when using Ng-app or Ng-controller directives, a new scope ($rootScope or $scope) is created, and scopes created with the Ng-controller directive inherit the parent scope ($ Rootscope or $scope) all methods and properties.But the

# function Destroy# Global Function Destruction# redefine function with the same name# del statement Delete function object# at the end of the programdef foo (xyz=[], u= ' abc ', Z=123): Xyz.append (1) return XYZPrint (ID (foo))def foo

Today's main content1. Dynamic Parameters2. Namespace or name space3. Nesting of functions4. Keywords Global and nonlocalDynamic functionsDynamic Parameters *args, **kwargs(1) *argsReceives all positional parameters corresponding to the argument

First, the name spacedefinition : Name-to-object mapping. A namespace is an implementation of a dictionary, a key is a variable name, and a value is a value that corresponds to a variable. The namespaces are independent of each other and cannot have

001. How to understand heap and stack?JS variables are stored in the stack storage and heap storage, the basic data types of variables stored in the stack, reference data types of variables stored in the heap reference type data address also exists

Definition of the function:Functions are well-organized, reusable, code snippets for single, or associated functionalityRole of the function:function can improve the modularity of the application, and the reuse of the CodeAny incoming parameter and

Use functions in JS to note three points:1, when the function is invoked, it is run in the grammatical environment when he is declared; 2, the function can not run itself, it is always called by the object, the function runs, the function body of

You can use number as function/variable name, the numberic name can ' t is accessed from the parent scope, and can be accessed B Y ' this ' in private scope.var o= { attr1:' value of attr1 ', 1: ' Private attr, the index is 1 ', 3

Less is a style language that gives CSS the properties of dynamic languages such as variables, inheritance, operations, and functions. Less can be run on the client (support Ie6+,webkit,firefox) or on the server with node. js or Rhino. Less as a

Closures are the characteristics of many languages, in JS, closures are mainly related to JS a few other features: scope chain, garbage (memory) recycling mechanism, function nesting, and so on.Prior to understanding closures. It is better to