removing a space

[inderPunj]

Hi All,

i wants to removing a space from my string by script.Like i have a=inder, if there is space like a= inder . before and after inder. Then i wants to remove that space.Please tell me the script how to do this. Thanks ...

[wje_lf]

Could you give us a very short but complete example of a script in which you anticipate finding a string with such an unwanted space? This gives us a context in which to help you.

[inderPunj]

Let i have a file aa.txt

$cat aa.txt
main= in (SPACE AT END AND START OF IN)
end= cc (SPACE AT END AND START OF CC)

How can i remove the space after = sign.

If you wants more specification, please let me know.

Thanks ...

[hugortega]

cat aa.txt | sed "s/= /=/g" > aa_replaced.txt

[wje_lf]

cat aa.txt | sed "s/= /=/g" > aa_replaced.txt

For more information, follow this link for the Useless Use of Cat Award.

Better:

sed "s/= /=/g" aa.txt > aa_replaced.txt

You can eliminate multiple spaces thus:

sed "s/= */=/g" aa.txt > aa_replaced.txt

[inderPunj]

Thanks

[ghostdog74]

using bash for not too large input file

while read line
do
 echo ${line/= /=}
done < "file"

[ghostdog74]

cat aa.txt | sed "s/= /=/g" > aa_replaced.txt

For more information, follow this link for the Useless Use of Cat Award.

for this case, i think it doesn't really matter, as performance wise, they are both quite the same. sed takes in standard input also.

# wc -l file
15830725 file
# time cat file | sed "s/= /=/g"  > cattest

real    0m47.755s
user    0m46.723s
sys     0m1.004s
# time sed "s/= /=/g" file > sedtest

real    0m48.812s
user    0m46.343s
sys     0m0.756s

[wje_lf]

Correct. It doesn't matter performancewise. But in general, the simpler the code, the better. The fewer pieces, the better. It makes code easier to maintain. It's this sort of practical esthetics that led Randal Schwartz to hand out awards for useless uses of cat. That's a bit of an ad hominem argument, sure, but he has a very good point, one with which I quite agree.

[drl]

Hi.

... uses of cat. That's a bit of an ad hominem argument ...

I'd call it ad Felis -- couldn't resist ... cheers, drl