My JavaScript array is structured like this:
var data_tab = [[1,id_1001],[4,id_1004],[3,id_1003],[2,id_1002],[5,id_1005]]
I am looking to organize and sort them based on the first value in each pair:
1,id_1001
2,id_1002
3,id_1003
4,id_1004
5,id_1005
Is there a way I can achieve this sorting in JavaScript?
The
sort()function arranges the elements of an array in a particular order and then returns the sorted array. The sorting may not be stable, with the default sort order being lexicographic rather than numeric.
console.log(tab_data.sort(function(first, second) {
return first[0] - second[0];
}));
Result
[ [ 1, 'item_001' ],
[ 2, 'item_002' ],
[ 3, 'item_003' ],
[ 4, 'item_004'],
[ 5, 'item_005'] ]
var data_tab = [[5,"id_1005"],[4,"id_1004"],[3,"id_1003"],[2,"id_1002"],[1,"id_1001"]]
function rearrangeData(first,second) {
if (first[0] < second[0])
return -1;
if (first[0] > second[0])
return 1;
return 0;
}
data_tab.sort(rearrangeData);
Experiment with this technique:
data_tab.sort((a, b) => a[0] - b[0]);
DEMONSTRATION:
var data_tab = [[1,'id_1001'],[4,'id_1004'],[3,'id_1003'],[2,'id_1002'],[5,'id_1005']];
data_tab = data_tab.sort((a, b) => a[0] - b[0]);
console.log(data_tab);
# Expected output: [[1,'id_1001'],[2,'id_1002'],[3,'id_1003'],[4,'id_1004'],[5,'id_1005']]
sorted_data_tab = data_tab.sort(function(a,b){return a[0]-b[0];});
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