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| Problems? Is your data what you think it is? | |
| PerlMonks |
Re^3: Nested greps w/ Perlby kennethk (Abbot) |
| on Dec 19, 2016 at 22:45 UTC ( [id://1178135]=note: print w/replies, xml ) | Need Help?? |
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I'm unclear on the particulars on your math, you should note that grep -c Z does not count the number of Z's, but rather the number of lines that contain a Z. If this takes you 10 years, then you have very slow drive access. The majority of processor time for the code block I posted is consumed by the slurp and memory access unless you've done something very wrong.
#11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.
In Section
Seekers of Perl Wisdom
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