Collection of useful string functions for BASH programming

functions-str.sh

#!/bin/bash
# Author: Maxwel Leite
# file-name: functions-str.sh
# Website: http://needforbits.tumblr.com/
# Description: Collection of useful string functions for BASH programming
# License: GPLv3

# Description: Remove leading and trailing whitespace characters
# @param string source string
# usage: result="$(trim "  a  b c  d    ")" 
trim(){
	[ -z "$1" ] && return
	printf "$(echo "$1" | sed -e 's/^[[:space:]]*//g;s/[[:space:]]*$//g')"
}