out of scope examples

According to the survey, the current failure rate of various IT projects in China is very high. Gartner Group conducted a survey of Fortune 500 companies in 2001, and the results showed that it projects. More than 72% is a failure. According to some

http://www.cnblogs.com/wolf-lifeng/p/3156936.html2.3 Global Scope 2.3.1 OverviewThe global scope is the largest namespace scope, unlike the user-defined namespace scope, where the global scope does not need to be defined, and it naturally exists in

The first three paragraphs describe the scope of the code ========== example 1========== var scope= ' global '; function fn () { alert (scope); var scope= ' local '; alert (scope); } fn (); Output results? alert (scope);//output

Preface: Before read a saying, if cannot take the knowledge to a person to parse clearly, the explanation actually also did not understand. The code is as follows Copy Code The first three paragraphs describe the scope of

The scope and scope chain of JavaScript. In the beginning of JavaScript, think it is no different from other languages, especially the scope of this piece, take for granted that "global variables are accessible anywhere in the program, that is, the

1. Scope chain 1.1. What is a scopeTalking about the scope chain, we have to start from the scope. Because the so-called scope chain is made up of multiple scopes. So, what is a scope?1.1.1 Scope is the execution environment of a function during the

a summary of the basic functions of JS including lexical scope and module Foundation.  1 Compiler---scope---engine The compiler is responsible for parsing and code generation, and the scope is responsible for maintaining a series of queries that

Javascript this keyword is generally not unfamiliar to everyone, but we need to think carefully about how to better use the Javascript this keyword. I hope this article will be helpful to the majority of programmers. Summary This series of blog

I. Description of scopeThere is an incisive description of scopes in the JavaScript authoritative guide: "The functions in JavaScript run in their defined scopes, not in the scopes they are executed in." ”In JavaScript, the concept of scopes is

As a programmer, you may have been used to the reference (or pointer) of the current object in object-oriented language ), As a programmer, you may have been used to the reference (or pointer) of the current object in object-oriented language, such