js 闭包函数例子2个

  匿名函数式：

  var func = (function () {
var sum = 0;
return function (num) {
sum += num;
console.log(sum);
}
})();
func(5); //5
func(2);  //7
func(2);  //9
func(7);  //16
func(1);  //17
func(2);  //19

循环式：

function fun() {
var result=new Array();
var i=0;
for(;i<10;i++){
result[i] =function (num) {
return function () {
return num;
}
}(i)；
}
return result;
}
var k=fun();
console.log(k[2](5));  //2

console.log(k[9](5))； //9