javascript - Using a variable as identifier in a json array -

i'm wondering if possible use assigned variables identifier in json array. when tried this, getting unexpected results:

(code simplified, parameters passed in different way)

  var parameter = 'animal'; var value = 'pony';  util.urlappendparameters (url, {parameter : value});   util.urlappendparameters = function(url, parameters) {     (var x in parameters) {         alert(x);     } } 

now alert popup says: 'parameter' instead of 'animal'. know use different method (creating array , assigning every parameter on new line), want keep code compact.

so question is: possible use variable identifier in json array, , if so, please tell me how?

thanks in advance!

no, can't use variable identifier within object literal that. parser expecting name there can't else provide string. couldn't this:

var parameter = 'animal'; var parameter = 'value'; //<- parser expects name, nothing more, original parameter not used name 

the work around if really want use object literal on single line use eval:

util.urlappendparameters (url, eval("({" + parameter + " : value})");