The difference was confusing for me, as well, when I first started learning Perl. The discussion of speed, notwithstanding, it should be noted that tr// isn't as 'flexible' as s// because the former will only translate the exact number of characters in the original string as there are characters in the replacement list. So, beyond our replacement of '+' signs:
$toto = 'this+is+my+text';
$toto =~ tr/my/your/d;

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$toto will now equal 'this+is+yo+text'. Where: 
$toto = 'this+is+my+text';
$toto =~ s/my/your/;

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$toto will now equal 'this+is+your+text'. A helpful distinction that is not blatantly obvious in the reading of Perl docs.

—Brad
"A little yeast leavens the whole dough."

In reply to Re: Difference between tr// and s///? by bradcathey
in thread Difference between tr/// and s///? by kalamiti

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