local scope

Arguments and formal parameters of a function# Optional Parameters```if (a = = = undefined) a = [];```Equivalent to```A = a | | [];```These two sentences are completely equivalent, except that the latter need to declare a in advance.If the parameter

By reading the "JS Advanced Program Design" This book, the scope of JS and the scope of the chain knowledge has a preliminary understanding and understanding, ready to take notes for your reference, notes in more words, but personally think the

1. Introduction to Functions Why should there be a function? Because in the normal writing code, if there is no function, then there will be many duplicate code, so the code reuse rate is relatively low ... And this kind of code maintenance is also

This article illustrates the ANGULARJS global scope and isolate scope communication usage. Share to everyone for your reference, specific as follows: At the time of project development, the global scope and Directive local scope usage is not clear

I'll demonstrate how micro-optimization (micro optimization) can improve the execution speed of Python code 5%. 5%! It will also offend anyone who maintains your code. But in fact, this article simply explains the code that you occasionally

In Python, variables are not the same type, which is not the same as most of the editing languages you've seen before. When you use a variable, you don't need to declare it in advance, just assign a value to that variable. However, when you use a

jquery Plug-in development model jquery Plug-ins typically have three ways of developing: Extend jquery through $.extend () Adding new methods to jquery via $.fn Creating a part Factory by $.widget () applying the jquery UI The

As we all know, the identifier of the name function expression is only valid in the local scope of the function. But As we all know, the identifier of the name function expression is only valid in the local scope of the function. But what does the

Directives are one of the techniques we use to extend browser capabilities. During DOM compilation, the instructions associated with the HTML element are detected and executed. This allows the instruction to specify the behavior for the DOM, or to

AngularJS global scope and Isolatescope communication usage example this article describes AngularJS global scope and Isolate scope communication usage. We will share this with you for your reference. The details are as follows: During project

20150516A header file, with a suffix of H, a declaration that contains functions, data (including data type definitions), classes, and so on.The "iostream" header file is referenced more than once in the example in order to share the input-output

I'll demonstrate how micro-optimization (micro optimization) can improve the execution speed of Python code 5%. 5%! It also angers anyone who maintains your code. But in fact, this article simply explains the code that you occasionally encounter in

In Python, there are no types of variables, which are different from most editing languages that you've seen in the past. When using a variable, you do not need to declare it in advance, just assign a value to the variable. However, when you use a

The old driver will show you the jQuery plug-in development process and the jquery plug-in process Jquery plug-in Development Mode Jquery plug-ins generally have three development methods: Use $. extend () to extend jQuery Add a new method to

1. Introduction to Functions Why do you have a function? Because when writing code in peacetime, if there is no function, then there will be a lot of duplicate code, so the code reuse rate is relatively low ... And this kind of code is also very

Usually, when we define a global variable (well, I'm saying this because the need for explanation--the global variables are bad), we use a function to access them that can be understood by Python: bar = 42def foo (): print Bar Here we use the

In JavaScript, the execution environment defines the other data that variables and functions have the right to do, and determines their respective behavior; scope is the range of variables and functions that can be accessed, divided into global

There are a lot of articles on the scope of python on the Internet, so the article I will share with you today allows you to easily get the scope of Python by learning these five knowledge points, for more information, see. There are a lot of

This article mainly introduces the detailed explanation of the variables and scopes in Python, which is very good and has reference value. if you need it, you can refer to the introduction of the scope. In python, the scope is divided into four

Python functions (II): python Functions Continue to explain the function today:Directory: 1. function object 2. Function nesting 3. namespace and scope 4. Closure 5. decorator 6. iterator 7. Generator 8. built-in functions  Part 1: Function