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Confuse on how to use array and eval..

 
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Top Forums UNIX for Dummies Questions & Answers Confuse on how to use array and eval..
# 1  
Old 02-11-2005
Confuse on how to use array and eval..
Hi,
Can anyone advise me on how to use array on Bash? I am really confuse in how eval is link to array... What i wan to do is let say i have an index of an array of 50. Store either 'N' or 'Y' or "NA" in each index. how to i go about doing it.. then lastly how to i print all the values out in a line... Smilie
# 2  
Old 02-11-2005
Code:
bash-2.05b$
bash-2.05b$ declare -a xyz[50]
bash-2.05b$ xyz[4]="y"
bash-2.05b$ xyz[7]="n"
bash-2.05b$ echo ${xyz[4]}
y
bash-2.05b$ k=7
bash-2.05b$ echo ${xyz[k]}
n
bash-2.05b$ xyz[k]=q
bash-2.05b$ echo ${xyz[k]}
q
bash-2.05b$ xyz[22]="na"
bash-2.05b$ echo ${xyz[*]}
y q na
bash-2.05b$

eval is not "a link to array" whatver that means. You don't need that declare, You can just start using the array and it will pop into existence. You can add the [50] to the declare for documentation reasons, but bash ignores it and will grow the array as required.
# 3  
Old 02-14-2005
Hi,
thank you a lot of your reply. Smilie I appreciate a lot

Regards,
valerie.
 
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