static scoping example

This seems to deviate from the general design idea of modern programming language. Like what def Foo (): x = 1 def Inner (): return x + 1 x = 3 Print Inner () Reply content:This code is lexical scoping, the static scope is that

Python is a static scope language, although it is itself a dynamic language. That is, the scope of a variable in Python is determined by its location in the source code, which is similar to C, but the scope difference between Python and C is quite

  Source: http://blog.sina.com.cn/s/blog_5d90e82f01018ge9.html     The interpreter is in-depth. Although I tried to start from the basic principle and try to make this article independent of other knowledge, this tutorial is not an entry to

static (static) keywords are used to define statics and properties and static can also be used to define static variables and later static bindings. 1. static variable variable A static variable exists only in a local function field, but its value

1.mysql Package ClassDefine parameters for initializing database connections in a constructor "because the parameter passed in when instantiating an object is the only parameter entry for that object"But instead of redundant definitions in the

Do you know the value of alert following JavaScript execution? var foo = 1; function Bar () { if (!foo) { var foo =; alert (foo); } Bar (); If you're surprised by the result of "10," you might want to take a good look at this article: var a =

Class Test{public static function A () {}Public Function B () {}}$obj = new test;Calling codeTest::a ();$obj->a ();$obj->b ();Examples of examples that require static variablesClass MyObject {public static $mystaticvar = 0;function MyMethod () {::

First of all, the so-called SQL dynamic and static, refers to when SQL statements are compiled and executed, both are used in SQL embedded programming, which is referred to as embedded refers to the SQL statement embedded in the high-level language,

Python Language Specification Pychecker? Run Pychecker definition for your code: Pychecker is a tool for finding bugs in Python source code. For less dynamic C and C + + languages, these bugs are usually captured by the compiler. Pychecker and lint

In this paper, we first explain the concept of closure in Lua, then summarize the application of closure, and finally discuss the implementation principle of the closure in Lua.The concept of closuresIn Lua, closures (closure) consist of a function