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Full Discussion: [BASH - KSH] Passing array to a function
Top Forums Shell Programming and Scripting [BASH - KSH] Passing array to a function Post 302186038 by ripat on Wednesday 16th of April 2008 10:28:38 AM
Old 04-16-2008
[BASH - KSH] Passing array to a function
Passing a array to a function, a basic feature in modern language, seems to be only possible in KSH. Not in BASH. Depite all my efforts I couldn't come to a solution. See the following examples:

It works perfectly in KSH:
Code:
#!/usr/bin/ksh

function print_array {
    # assign array by indirect variable reference (namerefs)
    typeset -n array=$1

    # display array content
    echo "${array[*]}"
}

colors=('Pink' 'Light Gray' 'Green')

print_array "colors"

But this one gave me headhache:
Code:
#!/bin/bash

function print_array {
    # trying to assign array by indirect variable reference
    declare -a array=${!1}
    # local array=${!1}         # doesn't work either

    # display array content
    echo "${array[*]}"
}

colors=('Pink' 'Light Gray' 'Green')

print_array "colors"

Some reference in the manual for using indirect reference in BASH:
http://tldp.org/LDP/abs/html/bashver2.html#VARREFNEW
 

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LEARN ABOUT LINUX

desktop_palette

desktop_palette(3alleg4)					  Allegro manual					  desktop_palette(3alleg4)

NAME

       desktop_palette - The palette used by the Atari ST low resolution desktop. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       extern PALETTE desktop_palette;

DESCRIPTION

       The  palette  used by the Atari ST low resolution desktop. I'm not quite sure why this is still here, except that the grabber and test pro-
       grams use it. It is probably the only Atari legacy code left in Allegro, and it would be a shame to remove it :-)

       The contents of this palette are 16 colors repeated 16 times. Color entry zero is equal to color entry 16, which is equal  to  color  entry
       24, etc.

	  Index      Color	 RGB values
	    0	  White 	 63  63  63
	    1	  Red		 63   0   0
	    2	  Green 	  0  63   0
	    3	  Yellow	 63  63   0
	    4	  Blue		  0   0  63
	    5	  Pink		 63   0  63
	    6	  Cyan		  0  63  63
	    7	  Grey		 16  16  16
	    8	  Light grey	 31  31  31
	    9	  Light red	 63  31  31
	   10	  Light green	 31  63  31
	   11	  Light yellow	 63  63  31
	   12	  Light blue	 31  31  63
	   13	  Light pink	 63  31  63
	   14	  Light cyan	 31  63  63
	   15	  Black 	  0   0   0

SEE ALSO

       default_palette(3alleg4), black_palette(3alleg4)

Allegro 							   version 4.4.2					  desktop_palette(3alleg4)
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