JS - merge 2 arrays of objects in JavaScript

JS - merge 2 arrays of objects in JavaScript
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soln1: Array.prototype.push.apply(arr1,arr2);
soln2: arr1 = arr1.concat(arr2);

eg: 
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); 

Output:

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

Ref: https://stackoverflow.com/questions/7146217/merge-2-arrays-of-objects