# Sample of using array as command

# Search script for using find and grep together to browse
# directories searching for extension, then search for pattern.

search() {
    local OPTIND=0 _o _usage _debug=false
    local -a _t _g _cmd=(find)
    read -rN9999 _usage <<-EOUsage
	Usage: $FUNCNAME [-a] [-d] [-i] [-I] [-H] [-l] [-t type [-t type]] \\ 
	        /path/ [path2/ ../path3/] pattern
	    -t .ext specifying an extension to search for
	    -d      debug, will dump command variable before execution
	    -[aiIHl] are 'grep' argument, see: man grep.
	    many type and many path could be given but only one pattern.
	EOUsage
    while getopts 't:aiIHld' _o ;do
        case $_o in
	    d) _debug=true ;;
	    t) _t+=(${_t+-o} -name \*.${OPTARG}) ;;
	    [aiIHl]) _g+=(-$_o) ;;
	    *) echo "${_usage%$'\n'}" ; return 1 ;;
        esac
    done
    _cmd+=(${@:OPTIND:$#-$OPTIND} -type f)
    ((${#_t[@]})) && _cmd+=(\( "${_t[@]}" \))
    _cmd+=(-exec grep ${_g[@]} ${@:$#} {} +)
    $_debug && declare -p _cmd
    "${_cmd[@]}"
}