var b = '1';
How can I create a variable name using the contents of variable b? I am doing this in a each loop, so b will change.
I am wanting the final product to be something like:
var trip1 = '';
How would I accomplish something like that?
var trip + b = '';
var trip.b = '';
No, but you can do it with properties of an object:
var obj = {};
obj.b = '1'
obj['trip' + obj.b] = '';
// or
var obj = {};
var b = '1'
obj['trip' + b] = '';
In JavaScript, you can access properties in two ways:
Using a dot and a literal property name, e.g. obj.trip1.
Using brackets and a string property name, e.g. obj['trip1'].
In the latter case, the string doesn't have to be a string literal, it can be the result of any expression, hence the examples above.
I am doing this in a each loop
Since you are iterating over them, the best way to do this is to use an array.
var trip = [1,2,3,4,5];
for (var i = 0; i < trip.length; i++){
alert(trip[i]);
}
To address your question, you could store your values as properties of an object:
var obj = {};
var b = '1';
obj['trip' + b] = "";
If you are doing this in the global scope, you could also add the variable as a property of the global object:
var b = '1';
window['trip' + b] = "";
trip1; // == ""
you can access global variables via the window object, using a dynmamic key like this:
var b = '1';
trip1 = 'hello';
console.log(window['trip'+b]);
It sounds like you are looking for the eval() method.
var b = '1';
(eval('var trip'+b+' = 3')); // Is the same as writing var trip1 = 3;
console.log(trip1);
//Output of variable trip1 is 3
Although, do a quick google search for why eval(); is bad before you employ this technique.
