Remove Duplicates From Json Array And Combine Its Id's Using Node.js

In the following code newData print as follows var newData =(JSON.parse(jobData)); console.log(newData); currently it contains 5 values.it may varying [{ mode: daily, id:

Solution 1:

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