choose jquery variable to change

Question

#date is a select tag (dropdown menu).

I already have a variable date001 and I want to change its value according to new value of dropdown menu.

$("#date").change(function() {
    var a = $("#room").html();  // result is `001` - it's ok
    var $("date" + a) = $(this).val(); // doesn't work !
});

This is not a variable, it's a `jQuery` object: `$("date" + a)` — emerson.marini, Jan 07 '15 at 17:47
Also, if you already have a variable, by using `var` you just created another one in this scope. — emerson.marini, Jan 07 '15 at 17:48
@MelanciaUK, what is the correct way? I need to change the value of `date001` var. — qadenza, Jan 07 '15 at 17:49
possible duplicate of [JavaScript: Get local variable dynamicly by name string](http://stackoverflow.com/questions/1920867/javascript-get-local-variable-dynamicly-by-name-string) — emerson.marini, Jan 07 '15 at 17:50

score 2 · Accepted Answer · answered Jan 07 '15 at 17:49

$("date" + a) is a jQuery selector; it's not doing what you think it's doing.

What's more likely is doing something like this:

window['date' + a] = $(this).val();

This isn't good practice, so perhaps you should attach your date001 variable, and others like it, to an object and reference them that way.

myObj['date' + a] = $(this).val();

choose jquery variable to change

1 Answers1