JavaScript学习记录总结（六）——js函数闭包特性

<script type="text/javascript">
function arrdemo(){
var arr=["hello","text","java"];
for(var i=0;i<arr.length;i++){
arr[i]=function(){
alert(i);
};
}
return arr;
}
var arr=arrdemo();
arr[0](); //3
arr[1](); //3
arr[2](); //3
</script>

<script type="text/javascript">
function arrdemo(){
var arr=["hello","text","java"];
for(var i=0;i<arr.length;i++){
arr[i]=iteratorI(i);
}
function iteratorI(j){
alert(j);
};
return arr;
}
var arr=arrdemo();
arr[0](); //0
arr[1](); //1
arr[2](); //2
</script>

<script type="text/javascript">
function arrdemo(){
var arr=["hello","text","java"];
for(var i=0;i<arr.length;i++){
arr[i]=function (i){
alert("i="+i);
};
}
return arr;
}
var arr=arrdemo();
arr[0](3); //i=3
arr[1](5); //i=5
arr[2](7); //i=7
</script>