Re: 2 minutes and 8 second (how do i convert it to 02:08)??
Rob Coops wrote:
$text = "2 minutes, and 8 seconds";
$text =~ /(\d{1,2}).*?(\d{1,2}).*/;
-^^
When you are extracting stuff, .* is _always_ redundant in the beginning
or end of a regex.
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Re: 2 minutes and 8 second (how do i convert it to 02:08)??
On 6/11/09 Thu Jun 11, 2009 1:51 AM, "Michael Alipio"
scribbled:
>
> Hi,
>
> I have a program that computes the number of elapsed minutes and seconds.
>
>
> if the outputs are:
>
> 2 minutes, and 8 seconds.
>
> How do I print those two values to look like "Elapsed time: 02:08"
This is how I would do it (untested):
my $text = '2 minutes, and 8 seconds';
if( $text =~ m{ (\d+) \s* minutes .* and \s* (\d+) \s* seconds }x ) {
printf "Elapsed time: %02d:%02d\n";
}else{
print "Invalid format: $text\n", $1, $2;
}
Note that it is important to test whether the regular expression matches
before using the capture variables $1 and $2.
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Re: 2 minutes and 8 second (how do i convert it to 02:08)??
On Thu, Jun 11, 2009 at 10:51 AM, Michael Alipio wrote:
>
> Hi,
>
> I have a program that computes the number of elapsed minutes and seconds.
>
>
> if the outputs are:
>
> 2 minutes, and 8 seconds.
>
> How do I print those two values to look like "Elapsed time: 02:08"
>
> Thanks!
>
>
>
>
> --
> To unsubscribe, e-mail: beginners-unsubscr...@perl.org
> For additional commands, e-mail: beginners-h...@perl.org
> http://learn.perl.org/
>
>
>
What I would do (though there are many other ways of course)
$text = "2 minutes, and 8 seconds";
$text =~ /(\d{1,2}).*?(\d{1,2}).*/;
$text = sprintf("%02d:%02d", $1, $2);
print "Elapsed time: $text\n";
Using a regular expresion I take the first 1 or 2 digits, then anything in
the middle is ignored, and the next 1 or 2 digits are taken out. Then then
in text I using sprintf place the two values captured in the regex,
prepending a 0 in case it is only one digit putting a : in the middle.
Then all I do is print the thing and you are done.
Of course you can as I said do it in many different ways but this is the
simplest...
2 minutes and 8 second (how do i convert it to 02:08)??
Hi, I have a program that computes the number of elapsed minutes and seconds. if the outputs are: 2 minutes, and 8 seconds. How do I print those two values to look like "Elapsed time: 02:08" Thanks! -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
