[Solved] remove duplicates from json array and combine its id’s using node.js

by


There are syntax errors in your code, missing , and quotes for mode values, after fixing the errors, you can try the following, neu array’s id properties are arrays and o here refers to the original array. 

var neu = [], l = o.length;

for (var i = 0; i < l; i++) {
    var f = neu.filter(function(e, _) {
       return e.os === o[i].os;
    });   
    if (f.length) {
        f[0].id.push(o[i].id);
    } else {
        neu.push({
            os: o[i].os,
            id: [o[i].id],
            mode: o[i].mode
        });
    }
}

jsFiddle

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solved remove duplicates from json array and combine its id’s using node.js