Uri Guttman <[email protected]> writes: > On 11/09/2016 02:04 PM, Bill Ricker wrote: >> I think Uri and Ricky have it nailed. >> >> You can >> wrap with do{ no warnings; ... } or >> protect the concatenation with 42 . ($b//q()); or equivalent ?: or or >> use $b .= 42 ; if order doesn't matter (it usually does, though) >> or initialized $b to '' instead of undef, knowing it will be >> concatenated (but in that case be sure it's tested for Truth not >> Definedness) >> >> > just to add on, i use .= so often. i like to build up strings and then > return the whole string. i never initialize them to '' as i know .= > works without warning. this is true for scalars and data structures as > i said before. any lvalue undef can be used in this way. > > uri >
Thanks everyone. Especially thanks for relating it to +=. I have trouble remembering the handy special cases but when it's somewhat systematic that helps. -- Mike Small [email protected] _______________________________________________ Boston-pm mailing list [email protected] http://mail.pm.org/mailman/listinfo/boston-pm
