Re: Linked lists as arrays: inserting values

I was pretty sure there was something for this in List::MoreUtils, but as it turned out there isn't. So I came up with this:

sub insert_array_elem 
{
  my ($ra, $elem, $index) = @_; # insert $elem before $ra->[$index]
  my $idx = 0;

  insert_after { $idx++ == $index-1; } $elem => @{$ra};
}
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This doesn't work for the edge cases (first and last element), but hey, that's what pop and friends are there for. Maybe you could write an email to the author of List::MoreUtils to provide an insert_at_index function?.

holli, /regexed monk/

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Re^2: Linked lists as arrays: inserting values by radiantmatrix (Parson) on Sep 25, 2006 at 17:13 UTC
I had checked List::MoreUtils and noted it didn't do that, and it might be nice for completeness. But given the other replies here, I think splice is about perfect as-is. <–radiant.matrix–> A collection of thoughts and links from the minds of geeks The Code that can be seen is not the true Code I haven't found a problem yet that can't be solved by a well-placed trebuchet	[reply]
Re^3: Linked lists as arrays: inserting values by holli (Abbot) on Sep 26, 2006 at 07:00 UTC
Yup. I benchmarked my solution against the other two and it is way slower. But: It looks best ;-) holli, /regexed monk/	[reply] [d/l]