In truth, the use Carp; (and the associated test for oddness) was tacked in the just for posting, it would always appear at the top of the program in real code. Does use have a huge runtime cost? I was under the impression that use was effectively a compile time directive?

Personnally, coming from a C-background, I find ... if @_ & 1; an eminently readable and obvious test for 'oddness'. It wasn't done as an optimisation, it's just the clearest test for oddness that I know of. YMMV.

The version of the code in my private library doesn't contain the oddness test at all. Though I think I will go back and add it, it already has a use Carp; atthe top anyway. I'll still use @_ & 1 though :)

the while loop still avoids building a 1 .. @_ / 2 list, thus still saving effort.

Aren't you just trading a >> and building one list, for building a local array and the then converting that back to list to return it? I doubt there's much in it in performance terms either way, but using an unnecessary intermediate variable seems very un-Aristotle-like:)

re: # let's remove the multiple calls to print() and make the use of a map justifiable, shall we?

As you pointed out yourself in your earlier post, your alternative wouldn't have demonstrated the problem I was describing, which was the only purpose of the code.

Examine what is said, not who speaks.

The 7th Rule of perl club is -- pearl clubs are easily damaged. Use a diamond club instead.

In reply to Re: Re: Problem emulating built-ins like map and grep. by BrowserUk
in thread Problem emulating built-ins like map and grep. by BrowserUk

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