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Regular expression with sed

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# 1  
Old 10-21-2008
Regular expression with sed
Hi,

I'm trying following:
Code:
echo "test line XA24433 test" | sed 's/.*X\(.*[^ ]\)/X\1/'
XA24433 test

While I want the output as: XA24433

I want to grab the words starting with letter X till the next space, this word can be anywhere in the line.
# 2  
Old 10-21-2008
Code:
echo "test line XA24433 test" | sed 's/.*X\(.*[^ ]\)/X\1/'|awk '{print $1}'

# 3  
Old 10-21-2008
Code:
% echo "test line XA24433 test" | sed 's/.*\(X[^ ]*\).*/\1/'
XA24433

Or (if you have more than one X on the line and you want the first one):

Code:
sed 's/[^X]*\(X[^ ]*\).*/\1/'

With zsh:

Code:
% s="test line XA24433 test"
% print ${(M)${(z)s}:#X*}
XA24433

Last edited by radoulov; 10-21-2008 at 11:06 AM.. Reason: added zsh
# 4  
Old 10-21-2008
Thanks for your answers, last solution is perfect, I need some more assistance, file format is as follows:
Code:
ADMDN13EX84447619,"HUMMER H3 SUV, LEATHER SEAT",XAWBG020209,m,Kuwaiti,M,13/05/1969,39,Block Building

I need XAWBG020209 from this line, I can't use awk because sometimes XA string is in the third column, my part numbers are starting with XA or XG, I want to take these part numbers then lookup in another file acc.csv which contains the description of these parts, I want to match part number extracted from this line with that part number and show the description, I wanted to do it by myself but since 3 hours I'm not able to figure out anything.

Second file is properly formatted, few lines from that file are as follows:
Code:
XG96470024,04-05OP WHEEL (ALLOY)
XG96545706,05OP SPOILER A-RR# HB
XG96635210,EPICA SPOILER KIT-V250
XG96635230,EPICA BODY KIT-V250
XG96654234,"AVEO TIP A-EXHAUST,TAIL - T -2"
XG96664463,07EP BLUETOOTH
XG96806104,07EP REAR SPOILER
XG96806220,07EP BODY KIT
XG96816783,07EP EXHAUST TIP
XGCHCAP71,CHROME PACKAGE CAPRICE 08

Your help would be appreciated.
Last edited by nervous; 10-21-2008 at 11:19 AM..
# 5  
Old 10-21-2008
ok, so lets build a regex then:

so long as the part number isn't going to be in the first column and it is always going to be followed by a comma then it is fairly easy (when you know how <grin>)

/.*,X[AG][a-zA-Z0-9]*,.*/

should match want you want, and to pull out the part number part just surround it with () and use \1 as the replace parameter:

/.*,\(X[AG][a-zA-Z0-9]*\),.*/

Code:
echo 'ADMDN13EX84447619,"HUMMER H3 SUV, LEATHER SEAT", \
XAWBG020209,m,Kuwaiti,M,13/05/1969,39,Block Building' \
|sed 's/.*,\(X[AG][a-zA-Z0-9]*\),.*/\1/'

Last edited by wempy; 10-21-2008 at 11:29 AM.. Reason: syntax correction
# 6  
Old 10-21-2008
Code:
awk -F, 'NR == FNR {
  for (i=1; i<=NF; i++)
    if ($i ~ /^X[AG]/) {
      _[$i]
      break
    }
  }
$1 in _' first_file acc.csv

With GNU grep and process substitution (if available) you may write something like this:

Code:
grep -f  <(grep -o 'X[AG][^,]*' first_file) acc.csv

# 7  
Old 10-21-2008
Process substitution is available in ksh, zsh, and bash on OSes that have /dev/fd
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