In the instance you have provided below yes it will cause an error as by the time you loop over "test_array" the first index is no longer there and is undefined. Even though you are deleting it the length of the array is still 2 so the first time it loops, "item" will be undefined and because it is undefined or whatever, the method "each()" is not available for a null value.
To do it properly you should use splice() (https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Objec ts/Array/splice) You should really tidy up your array creation also // Create the arrays array0 = ['00','01']; array1 = ['10','11']; // COPY the arrays into new memory space to make sure // dont have a conflict when you remove the array later test_array = [$A(array0), $A(array1)] ; // Remove the first item in the array test_array.splice(0,1) // Test output test_array.each(function(items, row){ items.each(function(i, r){ document.write(r + " : " + i + "<br />" ); }); }); Steve -----Original Message----- From: Shrike [mailto:martin.sile...@gmail.com] Sent: Thursday, 6 August 2009 8:39 PM To: MooTools Users Subject: [Moo] each error on IE Hello, can you help me to solve the IE error on this script? http://mooshell.net/gYxKu/ no errors with firefox or chrome var array0 = new Array(); array0[0] = '00'; array0[1] = '01'; var array1 = new Array(); array1[0] = '10'; array1[1] = '11'; var test_array = new Array(); test_array[0] = array0; test_array[1] = array1; delete test_array[0]; test_array.each(function(items, row){ items.each(function(i, r){ // IE error alert(i); }); });
