Bash trim string function

################################################################################
# Function:     trim
# Description:  Trims any/all whitespace from the beginning and end of a string
# Arguments:    $1 :- The string from which to trim whitespace
# Outputs:      Prints string with any leading/trailing whitespace removed
function trim {
    local str="$1"
    str="${str#"${str%%[![:space:]]*}"}"
    str="${str%"${str##*[![:space:]]}"}"
    echo "$1"
}