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Shell Programming and Scripting

command paste with variables

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# 22  
Old 03-27-2009
samos, what's the OS you're working on?
# 23  
Old 03-27-2009
CentOS
# 24  
Old 03-27-2009
could just anyone explain me how to store the variable a in file open by exec? because there is a function paste which do everything i need but only with files...all would be solved if i can put variables somehow in the files (which a canot create) and then use paste...
# 25  
Old 03-27-2009
The paste command works with std. input as well.
# 26  
Old 03-27-2009
Try this one out...
Code:
echo "$var1"
var1line1
var1line2
var1line3
var1line4

Code:
echo "$var2"
var2line1
var2line2
var2line3

Code:
echo "$var1" | awk '{print $1;print a}' a="$var2" | paste - - - - | awk '{print $1, $(NR+1)}'
var1line1 var2line1
var1line2 var2line2
var1line3 var2line3
var1line4

Last edited by shamrock; 03-27-2009 at 05:52 PM.. Reason: Ignore post as it won't work
# 27  
Old 03-27-2009
Or, as I already stated, with process substitution if your shell supports it:

Code:
$ printf '%s\n' "$v1"
var1line1
var1line2
var1line3
var1line4
$ printf '%s\n' "$v2"
var2line1
var2line2
var2line3
$ paste <(printf '%s' "$v1") <(printf '%s' "$v2")
var1line1       var2line1
var1line2       var2line2
var1line3       var2line3
var1line4       
$

Assuming default CentOS installation the code above will work with bash.
Last edited by radoulov; 03-27-2009 at 07:39 PM..
# 28  
Old 03-27-2009
yout code is working but only for lines without spaces...
e.g. var1='asd asd
fasd asd'
var2='das asd
f a '
result is:
asd das
fasd f

it concatenate only first words before space...
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