Referencing a JavaScript variable

Question

I have 2 variables in a script tag that get populated with string values. I also have an .each loop that goes through each select box I have on the page. I want a way to append the index value of the loop to the name of the variable, and retrieve its value.

var secQuestion1 = "bla"
var secQuestion2 = "bla"

    selectbox.each(function( index ) {
       var question = ['secQuestion' + (index+1) ];
       console.log("question = ", ['secQuestion' + (index+1)] )
    });

I thought I might be able to use bracket notation to retrieve the value. Any ideas on how to do this, so on each index in the loop I would get my questions values?

Interesting, I don't see any jQuery here. Have you looked at the documentation at all? docs.jquery.com — Hogan
– Hogan, Commented Jul 27, 2012 at 19:27

Alex Weinstein · Accepted Answer · 2012-07-27 19:27:24Z

2

I'd use an array here, for example:

var arrQuestions = ["question A", "question B", "questionC"];

selectbox.each(function( index ) {
   var question = arrQuestions[index];
}

answered Jul 27, 2012 at 19:27

Alex Weinstein

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Comments

hackattack · Accepted Answer · 2012-07-27 19:30:31Z

1

it depends in what context your code is running, if your variables are global then you can do

window['secQuestion' + (index+1)]

you can also put them in an object and access them that way

var obj = {
    secQuestion1: "bla",
    secQuestion2: "bla"
};
selectbox.each(function( index ) {
   console.log("question = ", obj['secQuestion' + (index+1)] )
});

answered Jul 27, 2012 at 19:30

hackattack

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3 Comments

Alex Weinstein Over a year ago

That's a terrible, unmaintainable technique. Please stop advocating global variables to a newbie.

hackattack Over a year ago

@Alex Weinstein, I answered his question, I did not advocate anything. Just because you don't like global variables does not mean people should not know about them and understand how to use them.

Chapsterj Over a year ago

I here you Alex about the global variable using the window approach but the var obj approach works perfectly and the variable is not global as its inside a jquery ready function. Thanks again.

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