Creating String from words in a file

deepakthaman · #1 (**permalink**) 09-15-2009

Hi i have a file called search.txt

Which contains text like

Car
Bus
Cat
Dog

Now i have to create a string from the file which should look like

Car,Bus,Cat,Dog

( appending , is essential part) String must be stored in some variable so i can pass it as argument to some other command.

my attempt so far

while read line
do
var1=$(awk '{print $NF}')
var2=','
var3=$var1$var2
done

cat var3

but no out put .... plz help
Thnx in advance

durden_tyler · #2 (**permalink**) 09-15-2009

Code:

$
$ cat f1
Car
Bus
Cat
Dog
$
$ cat f1 | tr '\n' ',' | sed 's/,$/\n/'
Car,Bus,Cat,Dog
$
$

tyler_durden

ripat · #3 (**permalink**) 09-15-2009

Hi, try to integrate this in your script:

Code:

awk -F"\n" -v RS="" '{for(i=1;i<=NF;i++) printf "%s%s",(i==1)?"":",",$i}'

durden_tyler · #4 (**permalink**) 09-15-2009

Yet another awk script:

Code:

$
$ awk '{s=s","$0}END{sub(/^,/,"",s); print s}' f1
Car,Bus,Cat,Dog
$
$

Or some Perl:

Code:

$
$ perl -nle 'chomp; push @x,$_; END{print join(",",@x)}' f1
Car,Bus,Cat,Dog
$

tyler_durden

deepakthaman · #5 (**permalink**) 09-15-2009

hi tyler_durden
plz can u explain the code i am new to awk

awk '{s=s","$0}END{sub(/^,/,"",s); print s}' f1

??

durden_tyler · #6 (**permalink**) 09-15-2009

Quote:

Originally Posted by deepakthaman

...
i am new to awk
...

If you are new to awk, then I recommend some reading up:

The GNU Awk User's Guide + lots of playing around with that (and other) scripts.

Everything about awk you seek is there in that one web page.

tyler_durden

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