Re^2: pull out num from str

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Re^3: pull out num from str by aaron_baugher (Curate) on Apr 23, 2012 at 17:01 UTC
If it works with all the formats your data includes, that's what's important. As jwkrahn pointed out, by removing your leading `.`, I did change the effect of yours in any case where there is more than one matching number in a string: `$str = 'This sentence has two numbers, +13 and -15.'; $str =~ /([+-]?\d+)/; # matches +13, first match found $str =~ /.([+-]?\d+)/; # matches -15 because .* is greedy` [download] So which of those you use depends on whether you want to find the first number or the last number in a line. If your lines only have one number, it won't matter. Aaron B. My Woefully Neglected Blog, where I occasionally mention Perl.	[reply] [d/l] [select]

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Re^3: pull out num from str
by aaron_baugher (Curate) on Apr 23, 2012 at 17:01 UTC

If it works with all the formats your data includes, that's what's important. As jwkrahn pointed out, by removing your leading .*, I did change the effect of yours in any case where there is more than one matching number in a string:

$str = 'This sentence has two numbers, +13 and -15.';
$str =~ /([+-]?\d+)/;   # matches +13, first match found
$str =~ /.*([+-]?\d+)/; # matches -15 because .* is greedy
[download]

So which of those you use depends on whether you want to find the first number or the last number in a line. If your lines only have one number, it won't matter.

Aaron B.
My Woefully Neglected Blog, where I occasionally mention Perl.

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