Documentation

Trim a string (drop spaces, tabs and newlines at both sides).

A simple (but inefficient) regex replace funcion

A simple regex split function. The resulting list will contain no empty strings.

Find the first instance of needle (must be non-empty) in haystack. We return the prefix of haystack before needle is matched.

Examples:

needlePrefix "cd" "abcde" = "ab"

needlePrefix "ab" "abc" = ""

needlePrefix "ab" "xxab" = "xx"

needlePrefix "a" "xx" = "xx"