Question

Trying to find folders that start with variables that are NOT case sensitive

var varname = ("BUI")
var stringMatch = "\\" + varname + "\\b";
if (FolderItems[i].name.match(stringMatch)) {
//do script
}

I find Regex pretty confusing, I know varname = \\\BUI\\\b, but what do I need to find a folder that begins with that variable? I’d like this to find a folder called 'Building_v02'

Answer 1

In the JavaScript regexp syntax, ^ is the anchor for the start of the string. Case insensitivity is indicated separately with the i flag:

var varname = "BUI";
var re = new RegExp("^" + varname, "i");
if (re.test(FolderItems[i].name)) {
    // do script
}

However, you should escape the string if it could contain any undesirable regexp metacharacter.

Also note that you may not have to use a regexp:

var varname = "BUI".toLowerCase();
if (FolderItems[i].name.toLowerCase().indexOf(varname) === 0) {
    // do script
}

To actually iterate over the array of items:

for (var i = 0; i < FolderItems.length; i++) {
    // ...
}