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Get the substring

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# 8  
Old 09-07-2010
SORRY, YOU ARE WRONG.
Quote:
Originally Posted by Damon_Qu
Hi All,

I have a ouput string likes 'u8wos' or 'u10acsd' or somthing else 'u{number}{any characters}'and I want to get the number behind the letter 'u' by bash shell.



Thanks
Damon
other sed script:
Code:
sed 's/\(u\)\([0-9]+\)\(.*\)/\2\1\3/' infile

should be literally

Code:
sed 's/u\([0-9]+\).*/\1u/' infile

Last edited by john1212; 09-07-2010 at 02:20 AM..
# 9  
Old 09-07-2010
Quote:
Originally Posted by frans
same behaviour as above
Code:
for S in u8wos u10acsd
do
   echo "S='${S//[a-z]/}'"
done

if something different comes before the 'u' and/or after the numbers
Code:
for S in u8wos u10acsd
do
   S=${S#*u}
   echo "S='${S%%[a-z]*}'"
done

Nice.

---------- Post updated at 11:43 AM ---------- Previous update was at 11:41 AM ----------
Quote:
Originally Posted by Damon_Qu
Hi All,

I have a ouput string likes 'u8wos' or 'u10acsd' or somthing else 'u{number}{any characters}'and I want to get the number behind the letter 'u' by bash shell.



Thanks
Damon
Please post sample output.
# 10  
Old 09-07-2010
Quote:
Originally Posted by frans
same behaviour as above
Code:
for S in u8wos u10acsd
do
   echo "S='${S//[a-z]/}'"
done

if something different comes before the 'u' and/or after the numbers
Code:
for S in u8wos u10acsd
do
   S=${S#*u}
echo "S='${S%%[a-z]*}'"
done

I have bash.
I done:
Code:
for S in u8wos u10acsd
do
   echo "S='${S//[a-z]/}'"
done

result:
Code:
S='8'
S='10'

next I done:
Code:
for S in u8wos u10acsd
do
   S=${S#*u}
echo "S='${S%%[a-z]*}'"
done

result:
Code:
S='u8uuu'
S='u10uuuu'

Now I do:
Code:
for S in u8wos u10acsd
do
   echo "S='${S//[a-z]/}u'"
done

result:
Code:
S='8u'
S='10u'

# 11  
Old 09-07-2010
John1212, what shell and version are you using on what OS?
Code:
$ for S in u8wos u10acsd; do S=${S#*u}; echo "S='${S%%[a-z]*}'"; done
S='8'
S='10'

# 12  
Old 09-07-2010
Quote:
Originally Posted by Scrutinizer
John1212, what shell and version are you using on what OS?
Code:
$ for S in u8wos u10acsd; do S=${S#*u}; echo "S='${S%%[a-z]*}'"; done
S='8'
S='10'

VERY SORRY.
YOU'RE RIGHT.
I had to commit a mistake when typing. Sorry.
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