Re^3: Does eval cause that much of a performance hit?

What are the alternatives

An alternative to your alternatives

  my $foo = defined($baz) ? $bar : undef;
[download]

or, with a sensible default, as an explicit undef is pretty dumb,

  my $foo = defined($baz) ? $bar : 0;
[download]

This saves at least a nextstate and an assignment, for no loss of readability.

• another intruder with the mooring in the heart of the Perl

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Re^4: Does eval cause that much of a performance hit? by BrowserUk (Patriarch) on May 06, 2009 at 13:50 UTC
I agree with you, except that we've now moved so far from the OPs point: prefer things like a three line if construct than a trailing if., and perrin's response that we're almost on a different subject. 'sides which, the same people that eshew the trailing if also tend to reject the ternary as too complex/confusing/unclear/short. as an explicit undef is pretty dumb, I'm not sure where you saw the explicit undef? Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice. "Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."	[reply]
Re^5: Does eval cause that much of a performance hit? by grinder (Bishop) on May 06, 2009 at 15:02 UTC
I don't think the topic has drifted. The point I wanted to make was that a ternary conditional is a viable alternative to introducing a scope (a 3-line if), if statement modifiers are not favoured by local shop practices. (Which is a reasonable edict, even if I don't agree with it myself). I'm not sure where you saw the explicit undef? There was none. It came about in my snippet from employing a ternary, which requires one to put something "in the else" part. • another intruder with the mooring in the heart of the Perl	[reply]


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