javascript extjs array group multi value

Question

i have a problem. i don't understand how group an array multidimensional for two o more values and then sum the field. i just tried with underscore.js but it allows only grouped by value. i'm use extjs 4. i have a grid and i wnat group record for the grid

    var records = Etx.getCmp('grdCorpoFatturaVendita').store.getRange();
    var castellettoDataArray = [];
    for (var x = 0; x < records.length; x++) {
        console.log(records[x]);
        castellettoDataArray.push(records[x].data);
    }

var groupedData = _.groupByMulti(castellettoDataArray, 'CodiceContoContabile');
console.log(groupedData );

Answer 1

I don't understand you very well, but i think that you are trying to group on a grid for one field:

sencha api: grid grouping

You need to add one feature on your grid view definition:

features: [{
    id: 'group',
    ftype: 'groupingsummary',
    groupHeaderTpl: '{name} ({rows.length})', //print the number of items in the group
    hideGroupedHeader: false
}],

One example on Sencha Api: Example