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Modern Core Perl Slides

Here are the slides from the Modern Core Perl talk that I gave at the LPW yesterday.

A great day at the workshop as always. And what a lot of people there were! Thanks to everyone who organised, spoke or attended.

By Dave Cross

Dave Cross runs Magnum Solutions Ltd., a London Perl consultancy.

In 1998 he started London Perl Mongers, the first Perl Mongers group outside of Northern America.

He is the author of Data Munging with Perl and a co-author of Perl Template Toolkit.

3 replies on “Modern Core Perl Slides”

Hi,

First: thanks for sharing!

Second: I’m very happy to see notices I didn’t know, like the HTTP::Tiny in core, etc too many time without read delta or brew new versions…

Greetings!

Slide 24 of 61 Smart Match Examples

In Perl 5.10.0
perl -le ‘@a=(1,2,3); print “found\n” if @a ~~ 2;’
found

perl -le ‘@a=(1,2,3); print “found\n” if 2 ~~ @a;’
found

In Perl 5.10.1 and above:

perl -le ‘@a=(1,2,3); print “found\n” if @a ~~ 2;’
perl -le ‘@a=(1,2,3); print “found\n” if 2 ~~ @a;’
found

You example uses @foo ~~ bar which does not work since 5.10.0. To find scalar in array the array has to be the second.

You’re absolutely right, of course. In my defence, that slide is in the 5.10 section, so the code does work.

But I should reverse the order of the operands in all of those examples.

Thanks.

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