Re: Warning-free numerification of a string

for ($val1, $val2) {
   $_--; $_++;
}
[download]

works, at least for most values, but

for ($val1, $val2) {
   no warnings 'numeric';
   $_ += 0;
}
[download]

is far less riskier and far more readable/maintainable.

Comment on Re: Warning-free numerification of a string Select or Download Code

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Re^2: Warning-free numerification of a string by oxone (Friar) on Aug 08, 2007 at 19:21 UTC
Thanks! Very sneaky, I like it. Probably a bit too sneaky to be considered maintainable, so I'll run with the latter. At least now I know I'm not missing a neat trick here. oxone \| www.datasalon.com	[reply]
Re^3: Warning-free numerification of a string by syphilis (Archbishop) on Aug 09, 2007 at 03:02 UTC
If `$_` is a string that that does not `look_like_number()`, then don't be fooled into thinking that `$_ + 0` will inevitably evaluate to zero: `$_ = '12*&&#$%'; $_ += 0; print $_, "\n"; # prints 12` [download] Cheers, Rob	[reply] [d/l] [select]
Re^3: Warning-free numerification of a string by varian (Chaplain) on Aug 08, 2007 at 22:09 UTC
Not sneaky at all, just contain the no-warnings to where you need it and the requirement is crystal-clear: `{ no warnings 'numeric'; $val1 = $val1+0; # force numeric }` [download]	[reply] [d/l]