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How to chose certain character in a word?

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# 1  
Old 09-19-2010
How to chose certain character in a word?
Hi Expert,

I would like to know on how to export only the first 6 character of below

0050569868B7
ABCDEFGHTY

to
005056
ABCDEF

Thank you.
Reggy
# 2  
Old 09-19-2010
Code:
$ ruby -ne 'print "#{$_[0,6]}\n"' file
005056
ABCDEF

This User Gave Thanks to kurumi For This Post:
regmaster
# 3  
Old 09-19-2010
Don't forget to use code tags.

Code:
grep -o "^.\{6\}" infile
awk '{print substr($0,0,6)}' infile

This User Gave Thanks to rdcwayx For This Post:
regmaster
# 4  
Old 09-19-2010
You guys are genius!

Many Thanks!

---------- Post updated at 06:48 PM ---------- Previous update was at 06:38 PM ----------

One more question, how do I pass the answer that I get from above and compare to existing file and match string , then produce output.

e.g
005056

grep 005056 textfile

But it has to be imported from above answer?

Thanks!
# 5  
Old 09-19-2010
Code:
grep -o "^.\{6\}" infile |xargs -i grep {} textfile

This User Gave Thanks to rdcwayx For This Post:
regmaster
# 6  
Old 09-20-2010
Prompt reply and superb!

Thanks!
# 7  
Old 09-20-2010
Code:
ruby -ne 'BEGIN{s=[]};s<<$_[0,6];END{File.readlines("textfile").each{|l|s.each{|y| puts l if l.match(y) }  }}' infile

This User Gave Thanks to kurumi For This Post:
regmaster
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