Sorting Arrays

1

Does anyone out there know how to sort a sub array based on one element within it? I have an array which contains a number of sub arrays. The sub arrays each have an element consisting of a single number. I need to sort the sub arrays within the “mother” array using this number as the key.

Any ideas?

2

maybe you can work out something off this. mother is an array containg arrays one, two, and three with values 4, 2, and 7. the for loop goes through each element in mother and prints them out.

mother = new Array();
one = newArray();
two = newArray();
three = new Array();
one = 4; two = 2; three = 7;
mother = [one, two, three];

for(i=0; i<mother.length; i++) {
//your sorting algorithm here
trace(mother*);
}

chris

3

Thanks Chris.

The problem is my sub arrays each contain several elements. The element I wish to sort on contains a number from 1 to 23. I need to do something like:

myMotherArray.sort (subArray [2]);

Where the third element in the subArrays is the element that needs sorting on.

I know this is nonsense and wouldn’t work but that’s the kind of thing I want to do

Thanks

Boondogger

4

if its always the same index eg 2 you could use
function myfunction(a, b) {
return (b[2]<a[2]);
}
motherArray.sort(myfunction);

5

Yes, that worked fine. Thanks for that.