At 05:16 PM 5/10/00, Jimmy S. Lim wrote:
>can someone help a newbie understand what ($i{$_} ++) means below? Thanks!
>
>while (<IN>) {unless ($i{$_} ++) {push (@Unique, $_)}}
1. It means you need a new Perl coder who isn't so full of himself. <grin>
2: I assume you know while(<IN>) says read a line and put it in $_ and
execute the loop.
there is a hash %i
$i{$_} is a item in that hash
the ++ says increment it
However, since the ++ is after the symbol it says return zero if it doesn't
exist.
If zero (unless), create an array @Unique that contains all the keys.
Seems like the "keys" verb could have done this better, but since I don't
see how @Unique is used this might be too harsh.
You either need to fire this dude or let him go work with Larry Wall. <grin>
Frank
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