extMask

Given an array of file names, extMask will return an array of all the filenames with the given extension.

jpal.extMask(files,ext);

files is an array of file names

ext is the extension you're looking for. You can also specify a list of extensions with a | (vertical bar) delineated list.

Example:

var textFiles = jpal.extMask({"a.txt","b.jpg","c.text"},"txt|text");

textFiles will contain {"a.txt","c.text"}