hi,
i was practising with javascript closure, i tried out one example as
follows
function globalMethod(){
var num = 200;
inc = function(){
num+= 10;
}
divBy2 = function(){
num/=2;
}
var alertNum = function(){
alert(" THE NUMBER IS "+num);
}
return alertNum;
}
var fn26 = function(){
var ee = globalMethod();
ee();
inc();
ee();
divBy2();
ee();
}
window.onload = fn26 ();
this works fine, from above example what i understood is, even if
function "globalMethod" returned closure function which holds the
reference of local variable "num" , the value of num is not lost even
if we manipulate the "num" using functions in global scope as function
"inc()",
now when i tried the next example , it gives a problem, it is as
follows
function buildList(list){
var arrFun = new Array();
for(var x = 0; x < list.length; x++){
arrFun[x] = function()
{ alert(" NUMBER "+list[x]); }
}
return arrFun;
}
function fn27(){
var arr = buildList([23,45,67]);
for(var x = 0; x < arr.length; x++){
arr[x]();
}
}
window.onload = fn27();
here, on page onload there is a three times alert as "NUMBER
undefined",
why so ?
why list[x] is not holding the value which was assigned initially.
waiting for the reply
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