Reference: JavaPoint BeginnerBook What is Binding Connecting a method call to the method body is known as binding. There are two types of binding static binding (also known as early binding): binding solved at compile time dynamic binding (also known…

static binding/dynamic binding class Person { private void who() { System.out.println("Inside private method Person(who)"); } public static void whoAmI() { System.out.println("Inside static method, Person(whoAmI)"); } public void whoAr…

get_called_class--后期静态绑定("Late Static Binding")类的名称 string get_called_class ( void ) 获取静态方法调用的类名. 返回类的名称,如果不是在类中调用则返回 FALSE. <?php  class Person{     public $username;     public $age;     public $height;     public $weight;     static public…

在我们以往中,在类中使用self关键字的时候都是指向了被调用方法定义时的类,而非原始的调用类. 例如: class Animal{ static $IQ_lv_avg = 1; public static function myiqlvavg(){ echo self::$IQ_lv_avg.PHP_EOL; } public static function test(){ self::myiqlvavg(); } } class Dog extends Animal{ static $IQ_l…

含有Collider和RigidBody的GameObject, Unity视之为Dynamic 含有Collider的GameObject, Unity视之为Static 如果Static的物体发生位移上的变化,Unity每一帧都会去重新缓存Static物体的Collider状态,这会消耗资源 所以只含有Collider的物体,就不要让他发生位置上的移动.或者给它加一个RigidBody的组件,把Gravity去掉,并且把IsKineMatic勾选上(该选项使得该物体不会因为其他物体的影响而发…

partition是hive提供的一种机制:用户通过指定一个或多个partition key,决定数据存放方式,进而优化数据的查询 一个表可以指定多个partition key,每个partition在hive中以文件夹的形式存在. 实例(static partition): 编辑文件:/home/work/data/test3.txt; /home/work/data/test4.txt; $ cat /home/work/data/test3.txt 1,zxm 2,ljz 3,cds 4,…

xmlns:sys="clr-namespace:System;assembly=mscorlib" <Window.Resources> <Style TargetType="TextBlock"> <Setter Property="Margin" Value="10"/> <Setter Property="FontSize" Value="150&…

限制绑定器 数据源…

JVM & Bytecode Has-a or Is-a relationship(inheritance or composition) 如果想利用新类内部一个现有类的特性,而不想使用它的接口,通常应选择合成.也就是说,我们可嵌入一个对象,使自己能用它实现新类的特性.但新类的用户会看到我们已定义的接口,而不是来自嵌入对象的接口.考虑到这种效果,我们需在新类里嵌入现有类的private对象.有些时候,我们想让类用户直接访问新类的合成.也就是说,需要将成员对象的属性变为public.成员对象会将自…

Programming language evolves always along with Compiler's evolvement JVM as Additional Indirection Introduction to Object Everthing is an object. Think of an object as a fancy variable; it stores data, but you can “make requests” to that object, aski…