You're almose there, just add a one after that comma after $p. The splice would then look like this: 
splice @picturelist, $p, 1;

[download]
The 1 in the above splice is used as a length; it tells how many elements to delete. To learn more about splice, just click one of the multiple links in the above paragraph.

Update: Well, I was concentrating on your syntax, tachyon provides a much more idiomatic answer; I'd go with his if I were you

The 15 year old, freshman programmer,
Stephen Rawls

In reply to Re: finding and deleting item from an array by srawls
in thread finding and deleting item from an array by Anonymous Monk

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