lodash merge array of objects code example
Example 1: how to merge 2 object array by the same key with lodash
Lodash
var a = [
{ userId:"p1", item:1},
{ userId:"p2", item:2},
{ userId:"p3", item:4}
];
var b = [
{ userId:"p1", profile:1},
{ userId:"p2", profile:2},
{ userId:"p4", profile:4}
];
var merged = _.merge(_.keyBy(a, 'userId'), _.keyBy(b, 'userId'));
var values = _.values(merged);
console.log(values);
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Example 2: lodash merge
import merge from 'lodash/merge'
let object = { 'a': [{ 'b': 2 }, { 'd': 4 }]};
let other = { 'a': [{ 'c': 3 }, { 'e': 5 }]};
merge(object, other);
Example 3: lodash merge array of objects without duplicates
var c = _.map(a, function(obj) {
return _.assign(obj, _.find(b, {parentId: obj.aId}));
})