Ive spent probably a hour on this problem, and cant figure it out.
Let me explain the problem.
I run head -n5 datasets/q13data.txt and get this :
Now if we look above, we see "<-:::" in the first line, "<-::" in the second, "->:::" in the fourth, now I must use sed to filter this so I get a output like:
And this is the command ive written:
The output should be as above, but i am getting:
Whats wrong ? well the first three, compare them to the above, and the second thing thats wrong is that when there is a "->" it only prints ">"
Like in my previous sed post, your problem is the leading greedy .*
Because here is no constant next character, it is most easy to switch to perl and its least greedy .*?
Or let perl grep out a matching portion (always the first match, but need to add a line feed e.g. by means of the -l option)
Last edited by MadeInGermany; 06-22-2016 at 03:09 PM..
Reason: Another perl solution
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