... with s///, consider the character class '[\$,]' in favour of the alternation '\$|,'. I expect, but don't know for certain, that the former would quicker ...

I certainly haven't Benchmark-ed it, but I think that with trie optimization for alternations (introduced with 5.10?), a humble alternation like  a|b|c gets compiled to  [abc] anyway. Even if not, any difference in speed would not, I think, be perceptible unless you were doing a gazillion matches.

... the '\r' modifier which allows you to chain s/// and y/// operations.

I knew about the  /r modifier, but I hadn't really thought about chaining these operations in this way! Come to think of it, such chaining was probably a signficant motive for adding this feature. Granted, the left-associativity of  =~ !~ looks a bit strange in conjunction with the right-assoc. of assignment (the RHS ends up in the middle of the expression), but I can live with that. Again, I've done no Benchmark-ing, but if forced, I think I'd say this trick was more likely to yield speed increases than attention to character class vs. alternation (at least in simple cases).

Give a man a fish:  <%-(-(-(-<

In reply to Re^2: Proper creation of a negative number by AnomalousMonk
in thread Proper creation of a negative number by insta.gator

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