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Arrays in unix

 
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# 1  
Old 04-26-2011
Arrays in unix
hi all,

is there any method to declare each line of a text file to array variable.

my text file is:

Code:
123
222
333

so,
Code:
a[0]=123
a[1]=222
a[2]=333

can anyone help me out pls...

thanks in advance,
Arun ManasSmilie
Moderator's Comments:
Mod Comment
Please use code tags when posting data and code samples!
Last edited by vgersh99; 04-26-2011 at 03:14 PM.. Reason: code tags, please!
# 2  
Old 04-26-2011
Hello, not sure what language you wanted it in. Here's the ksh version.

Code:
#!/bin/ksh
 
n=0
while read line
do
    a[$n]="$line"
    n=$(expr $n + 1)
done < infile
 
n=0
while [ $n -lt ${#a[*]} ]
do
    echo "a[$n]=${a[$n]}"
    n=$(expr $n + 1)
done

# 3  
Old 04-26-2011
Much simpler way to do that in KSH:

Code:
IFS=$'\n' set -A ARR `cat wtf`

Or in BASH:

Code:
OLDIFS="${IFS}"
IFS=$'\n'
ARR=( `cat wtf` )
IFS="${OLDIFS}"

I don't feel quite so bad about using cat when the output is supposed to be completely stored in local variables.
# 4  
Old 04-27-2011
hi all,

am using bash shell..

is that code differs from wat u ve posted????
# 5  
Old 04-27-2011
I've already showed you one way to do it in bash and labeled it as 'or in BASH'.
 
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