jQuery Grid Plugin - jqGrid - Topic: sortArrayData - will not reverse sorting?

tony on sortArrayData - will not reverse sorting?

Mon, 15 Feb 2010 16:04:26 +0200

Hello,

Already done in GitHub

http://github.com/tonytomov/jq.....dcd50b0c9c

Thanks.

Best Regards

Tony

Les on sortArrayData - will not reverse sorting?

Mon, 15 Feb 2010 15:50:23 +0200

I wanted to add more detail. When I click consecutively on the column header to sort grid data, the code below inside sortData() is called.

rows.sort(function(a, b) {

if (a.sortKey < b.sortKey) {return -newDir;}

if (a.sortKey > b.sortKey) {return newDir;}

return 0;

});

This code is not efficient because it sorts an already sorted array. When the array is sorted and we want to sort it (on the client) in reverse order (by clicking on the same column header), the rows.reverse() method should be used.

rows.reverse()

Les on sortArrayData - will not reverse sorting?

Sun, 14 Feb 2010 15:40:02 +0200

I believe there's an inefficiency in the sortArrayData() function. This method is not reversing results of an already sorted array, but it instead it sorts it again.

Reversing an already sorted array is much faster, so the rows.reverse() method should be used when rows are sorted and we want to reverse the order.