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1

hi ,
i have follwing strings in a text file

hello i am cool
hey i am cool
arrey i am cool

in all the above 3 i wanna retrieve cool.......for this i used

split(/ /)
but it takes into consideration only one space.......is there any regular expression to do the trcik?

THANKS

regards
vivek.s

2

yes

$ more mr_cool
hello i am cool
hey i am cool
here is cool in the middle of a line
cool is at the beginning here...
$ sed 's/^.*\(cool\).*$/\1/g' mr_cool
cool
cool
cool
cool

Cheers
ZB

3

that was terrific yaar!i am awed by power unix and shell programmers :slight_smile:

but i wanted to do this in perl...sorry for not mentioning......

THANKS FOR UR KIND HELP

EDIT : SORRY I GUESS I CAN USE SED IN PERL TOO :slight_smile:

ZAZZY WHEN U FIND TIME CUD U EXPLAIN THAT REGULAR EXPRESSION OF URS?

regards
vivek.s

4 
$ perl -p -e "s/^.*(cool).*$/\1/" mr_cool
cool
cool
cool
cool

Add -i if it does what you want

Cheers
ZB

5

thank you very much

EDIT : WOULD THAT WORK IN PERL PROGRAM, I REMEMBER THAT, INLINE STRINGS WOULD NOT WORK IN A PROGRAM........

regards
vivek.s

6 
s/^.*(cool).*$/\1/

s/ - substitute
^ - beginning of line
.* - any number of anything
(cool) - if we find cool, remember that we find it - same as \(cool\) in sed
.* - any number of anything again
$ - end of line
/\1/ - replace the whole line with whatever we remembered

This is very "conceptual" - read a good regex book for more - you can have multiple \( \) and then shuffle the order of things about, e.g.

$ echo "three words here" | sed 's/^\([^ ]*\) \([^ ]*\) \([^ ]*\)/\2 \3 \1/'
words here three

Again, a full regular expression tutorial is beyond the scope of any thread... Google will be your friend here...

Cheers
ZB

7

Together with this thread, and your earlier thread on inline edits, you'll be able to solve this problem.

ZB

8

THANKS FOR HELP BOB.....I am bit more clear than i was b4!!anyway it wud take some time to comprehend the expression u gave!!:-)i wud search google for more info!!

I'll make use of both threads and solve :slight_smile:

THANK YOU

REGARDS
VIVEK>S