Question

I am using a small script that adds custom selections to a dropbox using the following code

if (typeof customsum1 != "undefined") { editsummAddOptionToDropdown(dropdown, customsum1); }
if (typeof customsum2 != "undefined") { editsummAddOptionToDropdown(dropdown, customsum2); }
if (typeof customsum3 != "undefined") { editsummAddOptionToDropdown(dropdown, customsum3); }

and so on. This is expandable by adding more lines, but since the variables have the same format, is there a way to condense this to theoretically allow infinite custom selections as long as the set variables follow the customsum# format?

Answer 1

Use an array and a loop:

var sums = [customsum1, customsum2, customsum3];

for (var i=0; i<sums.length; i++) {
    if (typeof sums[i] !== 'undefined') {
         editsummAddOptionToDropdown(dropdown, sums[i]);
    }
}