Okay, I gotta throw my hat in the ring here... 

sub insert_after_first {
    my ($ndx, $arr, $elt, $ins) = (0, @_);
    $ndx > @$arr and return while $arr->[$ndx++] ne $elt;
    splice @$arr, $ndx, 0, $ins;
}

[download]

Update: Here's a version that is a little more efficient, removing one boolean comparison from the loop. 

sub insert_after_first {
    my ($ndx, $arr, $elt, $ins) = (0, @_);
    $arr->[$ndx++] eq $elt and last for 0 .. @$arr;
    splice @$arr, $ndx, 0, $ins if $ndx <= @$arr;
}

[download]

--DrWhy

"If God had meant for us to think for ourselves he would have given us brains. Oh, wait..."

In reply to Re: Inserting an element into an array after a certain element by DrWhy
in thread Inserting an element into an array after a certain element by saintmike

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