s/// at the end of a map()
Me too. And I'll probably continue to do it even after perl 5.14 is released. The new /r modifier was introduced in perl 5.13.2 perlop:
If the /r (non-destructive) option is used then it will perform the substitution on a copy of the string and return the copy whether or not a substitution occurred. The original string will always remain unchanged in this case. The copy will always be a plain string, even If the input is an object or a tied variable. 
@foo = map { s/this/that/r } @bar   # /r is very useful in maps

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In reply to Re: Stupid mistakes I repeatedly make (map s///r) by toolic
in thread Stupid mistakes I repeatedly make by brian_d_foy

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