JAVASCRIPT

merge array of objects javascript

Object.keys(arrayObject).map(key=>arrayObject[key]).reduce((old,item)=>(
          {...old,...item}
),{})

merge 2 array of object by key

let arr1 = [
    { id: "abdc4051", date: "2017-01-24" },
    { id: "abdc4052", date: "2017-01-22" }
];

let arr2 = [
    { id: "abdc4051", name: "ab" },
    { id: "abdc4052", name: "abc" }
];

let arr3 = arr1.map((item, i) => Object.assign({}, item, arr2[i]));

console.log(arr3);
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Merge two array of Object in JavaScript

var arr1 = [{name: "lang", value: "English"},{name: "age", value: "18"}];
var arr2 = [{name : "childs", value: '5'}, {name: "lang", value: "German"}];

Array.prototype.push.apply(arr1,arr2); 

console.log(arr1);  // final merged result will be in arr1


/*
[{"name":"lang","value":"English"},
{"name":"age","value":"18"},
{"name":"childs","value":"5"},
{"name":"lang","value":"German"}]
*/

Merge array of objects into one object

const arrObj = [{a: 1, b: 2}, {c: 3, d: 4}, {e: 5, f: 6}];

console.log(arrObj.reduce(function(result, current) {
  return Object.assign(result, current);
}, {}));

// If you prefer arrow functions, you can make it a one-liner ;-)
console.log(arrObj.reduce(((r, c) => Object.assign(r, c)), {}));

// Thanks Spen from the comments. You can use the spread operator with assign
console.log(Object.assign({}, ...arrObj));
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