note BrowserUk <blockquote><i>So this is a 3-dimensional array...</i></blockquote> <p>Not the way you shown it isn't: <code> @inner1 = (0, 1, 2); @inner2 = (1, 4, 7); @inner3 = (2, 5, 8); @inner4 = (6, 7, 9); @array1 = (@inner1, @inner2, @inner3, @inner4);; print @array1;; 0 1 2 1 4 7 2 5 8 6 7 9 @array2 = (@inner1, @inner2, @inner3, @inner4);; print @array2;; 0 1 2 1 4 7 2 5 8 6 7 9 %hash = (array1, @array1, array2, @array2);; pp \%hash;; { "0" => 1, "1" => 4, "2" => 5, "4" => 7, "5" => 8, "6" => 7, "7" => 9, "8" => 6, "9" => "array2", "array1" => 0, } </code> <p>If that's the way you are building it in your program; it is little wonder your attempt to sort it didn't work? <div class="pmsig"><div class="pmsig-171588"> <hr /> <font size=1 > <div>With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'</div> <div>Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.</div> <div>"Science is about questioning the status quo. Questioning authority". </div> <div>In the absence of evidence, opinion is indistinguishable from prejudice. <p align=right> [http://thebottomline.cpaaustralia.com.au/|RIP Neil Armstrong]</p></div> </font> </div></div>font size=1 1001665 1001665