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Postings from March 2000
JVromans@squirrel.nl (Johan Vromans) wrote > It is even worse. The following program compiles and runs with only > one warning: that @a[2] should be written as $a[2]. @a->[2] is > accepted, without complaint, to apparently mean $a[2]. I recall from the last time this came up that it's an accidental feature. If the LHS of -> is an array or hash, it's treated as if it were a reference to that array or hash. I think it hasn't been removed for fear of breakage. But it certainly ought to be documented. Patch attached. And I wouldn't mind seeing a warning for that. > And I cannot > see why 'scalar(@x)->[2]' produces the 3rd element of array @x. Where does it say anything about scalar context? Mike Guy --- ./pod/perlop.pod.orig Mon Mar 13 21:39:26 2000 +++ ./pod/perlop.pod Fri Mar 17 14:20:58 2000 @@ -101,7 +101,10 @@ symbolic reference to an array, a hash, or a subroutine respectively. (Or technically speaking, a location capable of holding a hard reference, if it's an array or hash reference being used for -assignment.) See L<perlreftut> and L<perlref>. +assignment.) See L<perlreftut> and L<perlref>. Currently, +the left hand side may also be an array or hash; it's treated as +if it were a reference to that array or hash. But that's an +accidental feature which may disappear in future Perls. Otherwise, the right side is a method name or a simple scalar variable containing either the method name or a subroutine reference, End of patch