Re: Answer: How do I match a number range?

in reply to Re: How do I match a number range?
in thread How do I match a number range?

> my $range = join '|', 5278..5391;
> my $number = 5300;
> print "Matched\n" if $range =~ /\b$number\b/;
[download]

You want $number =~ /^($range)$/ instead.

Also, you need to create a potentially large list in memory then turn it into a large string. For numbers of this size, this isn't really a problem, but what if you are trying to match unix time values, that's 780k just to match a one day time frame.

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(tye)Re: Answer: How do I match a number range? by tye (Sage) on Nov 28, 2000 at 22:54 UTC
I disagree. If you wanted to see if a number fell within a certain range, then a regex would be a really bad tool to use. However, if you wanted to match all occurances within some larger string of numbers that fell within a certain range, then the pain of using a regex to match a number range might pay off. So I think the original answer was closer to correct than yours. But I think mine is even closer: `/(^\|\D)($range)(\D\|$)/` [download] since the original doesn't find the number in "x5300x". - tye (but my friends call me "Tye")	[reply] [d/l]

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(tye)Re: Answer: How do I match a number range?
by tye (Sage) on Nov 28, 2000 at 22:54 UTC

I disagree. If you wanted to see if a number fell within a certain range, then a regex would be a really bad tool to use. However, if you wanted to match all occurances within some larger string of numbers that fell within a certain range, then the pain of using a regex to match a number range might pay off. So I think the original answer was closer to correct than yours. But I think mine is even closer:

/(^|\D)($range)(\D|$)/
[download]

tye

[reply]
[d/l]

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