On Tue, 24 Sep 2002, David Samuelsson (PAC) wrote: > @array = grep !/^\s*$/, @array; > This will return an array of elements (removing all elements that are either filled >with spaces or are blank) > > George. > > i read that it wasnt so good to use this in ther perlfaq:
There is nothing wrong in using grep or map if you want to process all the elements in the array. It is ineffecient if you are performing a first match kind of operation. In your original post you did not have a last statement in the for loop, leading us to believe that you are processing all the elements in the array. For your problem it is better to use a hash instead with the usernames as keys. To remove a users information delete that key (perldoc -f delete) > > Please do not use > > ($is_there) = grep $_ eq $whatever, @array; > or worse yet > > ($is_there) = grep /$whatever/, @array; > These are slow (checks every element even if the first matches), inefficient (same >reason), and potentially buggy > (what if there are regex characters in $whatever?). To get around this place $whatever in between a \Q and a \E in the pattern. (perldoc perlre) -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
