javascript - Merge two array of objects with same keys, some object won't have the same value?

Question

I want to merge two arrays of objects. The keys are the same but the values might not always be the same.

Any solution is appreciated preferably in javascript, but a python solution is fine as well.

Here is the sample data:

var g= [ 
    { id: 36, name: 'AAA', goal: 'yes' , 'random':27},
    { id: 40, name: 'BBB', goal: 'yes' },
    { id: 39, name: 'JJJ', goal: 'yes' },
    { id: 27, name: 'CCC', goal: 'yes' , lag: "23.3343"}];


var c= [ 
    { id: 36, name: 'AAA', goal: 'yes', color:"purple" },
    { id: 40, name: 'BBB', circle: 'yes', color:"purple" },
    { id: 100, name: 'JJJ', circle: 'yes'} ];

My expected output should be :

 var finalData = [{
 { id: 36, name: 'AAA', goal: 'yes' ,'random':27, color:"purple"},
 { id: 40, name: 'BBB', circle: 'yes', color:"purple"},
 { id: 39, name: 'JJJ', goal: 'yes' },
 { id: 27, name: 'CCC', goal: 'yes' ,lag: "23.3343"},
 { id: 100, name: 'JJJ', circle: 'yes' }

  }]

Here is my current code, it works to some degree but it doesn't add keys it might have missed.

var finalData = [];
for(var i in g){
   var shared = false;
   for (var j in c)
       if (c[j].name == g[i].name) {
           shared = true;
           break;
       }
   if(!shared) finalData.push(g[i])
}
finalData = finalData.concat(c); 

finalData

Answer 1

You could use a Map for keeping same id in the same object and Object.assign for creating independent objects.

var g = [{ id: 36, name: 'AAA', goal: 'yes', 'random': 27 }, { id: 40, name: 'BBB', goal: 'yes' }, { id: 39, name: 'JJJ', goal: 'yes' }, { id: 27, name: 'CCC', goal: 'yes', lag: "23.3343" }],
    c = [{ id: 36, name: 'AAA', goal: 'yes', color: "purple" }, { id: 40, name: 'BBB', circle: 'yes', color: "purple" }, { id: 100, name: 'JJJ', circle: 'yes' }],
    map = new Map,
    result = g.concat(c).reduce(function (r, o) {
        var temp;
        if (map.has(o.id)) {
            Object.assign(map.get(o.id), o);
        } else {
            temp = Object.assign({}, o);
            map.set(temp.id, temp);
            r.push(temp);
        }
        return r;
    }, []);

console.log(result);

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