Programming :: Perl Only Matching Single-character Regex Patterns?

Jan 20, 2009

I'm having a small issue with regex matching in Perl. I'm pretty certain it's a simple fix, but it all looks correct to me...

If I run the following:

Code:

It prints out all the lines containing a 'P', as one would expect. But when the regex is

Code:

I get zero lines printed. It seems to match only single-character patterns.

The file I'm reading is: (It has the same effect whether I leave it with Windows linebreaks or convert them to unix).

Code:

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Mar 19, 2010

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Feb 23, 2011

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Oct 4, 2010

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Code:

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I am trying to compare a list of patterns from one file and grep them against another file and print out only the unique patterns. Unfortunately these files are so large that they have yet to run to completion. Here's the command that I used:

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Code:
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Code:
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