This method converts a[.b[.c[.d]]]] to 00a[00b[00c[00d]]]] (Where abcd are digits.) by executing a string from a StringRegExpReplace function. It works on a 1D or 2D array. #include <Array.au3> Local $aVersionsAndReleases[6][2] = [["0.2.8.9", "Release #2"], ["0.2.9.10", "Release #1"], ["0.2.8", "Release #1"], _ ["0.2.7.10", "Release #1"], ["0.2.9.11", "Release #2"], ["0.3", "Release #1"]] ; Or try ;Local $aVersion