jQuery dynamically increment variable name inside a for-loop

Question

is it possible to add i to a var inside a for-loop? in wrong syntax it would look like the code below

for(i=1; i<=countProjects; i++){

    var test + i = $(otherVar).something();

};

Thanks!

Please elaborate. Increment the variable, or the variable name? — Jivings
– Jivings, Commented Mar 26, 2012 at 10:37
sorry if I was unclear, the variable name. So if i == 3 you'll get test1, test2 and test3 — Matthias O.
– Matthias O., Commented Mar 26, 2012 at 10:39

Joel Lundberg · Accepted Answer · 2012-03-26 10:47:56Z

6

It would be best to use an array for this:

var test = [];

for (i = 1; i <= countProjects; i++) {
    test[i] = $(otherVar).something();
};

Then you could access the values like this:

console.log(test[1]);
console.log(test[2]);
etc...

If you have really good reason to have named variables for each value, you can create them like this:

for (i = 1; i <= countProjects; i++) {
    window["test" + i] = $(otherVar).something();
};

console.log(test1);

answered Mar 26, 2012 at 10:47

Joel Lundberg

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1 Comment

joncys Over a year ago

window["test"...] will only be accessible in global scope, if no scope indication is used on the trace (console.log(window.test1);. You shouldn't assume it's always global scope, IMHO.

2 revs · Accepted Answer · 2017-05-23 11:53:31Z

5

As Mat stated, you should be using arrays for this type of functionality:

var projects = [];
for (var i = 0; i <= countProjects; i++) {
    projects.push($(otherVar).something());
}

You could craft variable names, using object["varname"] syntax. But it's _generally_ bad practice:

var varName;
for (var i = 0; i <= countProjects; i++) {
    varName = "test" + i.toString();
    this[varName] = $(otherVar).something();
}
console.log(test1);

edited May 23, 2017 at 11:53

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