osx - Build Bash variable name -

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this question has answer here:

i want create function colored output (just learn bash little better)

here works

esc_seq="\x1b[" # foreground red fg_red="${esc_seq}31;" # background yellow bg_yellow="43;" # style bold fs_bold="1m" # echo echo -e "${fg_red}${bg_yellow}${fs_bold}hello world!"

no try build function

function ext_echo()  {     // lets $1 red, $2 yellow, $3 bold     // need ...     echo -e "${fg_$1}${bg_$2}${fs_$3}hello world!" }

how can build echo execution parameters?

the following script should enough starting point:

#!/bin/bash   ext_echo() {   declare -a colors    colors=(     [red]="<red>"     [blue]="<blue>"   )    c in "$@";     echo ${colors[$c]}   done }  ext_echo red blue

output

<red> <blue>

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