In the following example, is a new variable 'y' created for each iteration through the for..in loop? Or is the variable declaration hoisted to the top of the function, and re-used for each iteration?
function example() {
var x;
for(x in obj) {
var y = obj[x];
}
}
Thanks
y is the same variable being replaced. to make a new one you would use
function example() {
var x;
var y= new Array;
for(x in obj) {
y[x] = obj[x];
}
}
var y and y[x] = obj[x], and then read the value of y between those two statements, you'll find that y still contains the array. Ie, it is not a new undefined variable.
var keyword?You can test this for yourself:
var obj = {
name: "Dan",
surname: "Tao"
};
var x;
for (x in obj) {
var y = obj[x];
}
alert(y);
An alert box will appear with the text Tao, indicating that y is accessible outside the scope of the for loop.
