Examples of using JavaScript anonymous functions and delegates_Basic knowledge

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Release： 2016-05-16 16:41:25

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<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
  <!-- C#匿名函数--> 
  <title></title> 
  <script type="text/javascript"> 
    var f1 = function (x, y) { //【1】 定义一个匿名函数，用变量f1来指向它(f1相当于一个委托，这个时候f1就可以当做一个函数来用了)  
      return x + y; 
    } 
 
    //调用这个匿名函数  
    alert(f1(5, 6)); //输出11  
    //【2】 还可声明匿名函数立即使用  
    alert(function (a, b) { return a + b } (10, 2)); //直接声明一个匿名函数function (a, b) { return a + b }，然后直接使用function (a, b) { return a + b } (10, 2)。连指向匿名函数function (a, b) { return a + b }的变量f1都不用了。这里输出12  
 
    //【3】 没有参数的匿名函数  
    var f2 = function () { alert("你好") }; 
    f2(); //这里输出“你好”  
 
    var f3 = function () { return 5 }; 
    alert( f3() + 5);//输出10 
  </script> 
</head> 
<body> 
 
</body> 
</html>

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