Re^2: An efficient way to gather a common portion of several strings' beginnings

The m[(^\0+)] match results in an undefined value for $mask when there is no common base substring at all, which then hiccups a "Use of uninitialized..." warning in the substr expression (if warnings are enabled). Happily, this is easily fixed by using m[(^\0*)] instead!

Give a man a fish: <%-{-{-{-<

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Re^3: An efficient way to gather a common portion of several strings' beginnings by BrowserUk (Patriarch) on Nov 15, 2015 at 17:38 UTC
Good catch and nice solution; but if the OP is expecting there to be a common prefix to his lines, then that warning might be a godsend in the event of a dataset where that is not the case. With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday' Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". I knew I was on the right track :) In the absence of evidence, opinion is indistinguishable from prejudice.	[reply]

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Re^3: An efficient way to gather a common portion of several strings' beginnings
by BrowserUk (Patriarch) on Nov 15, 2015 at 17:38 UTC

Good catch and nice solution; but if the OP is expecting there to be a common prefix to his lines, then that warning might be a godsend in the event of a dataset where that is not the case.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority". I knew I was on the right track :)

In the absence of evidence, opinion is indistinguishable from prejudice.

[reply]