Merge two object literals in javascript -

i have 2 object literals:

var animal = {     eat: function() {         console.log("eating...");     } }  var dog = {     eat: "this has replaced when merged",     nroflegs: 4 } 

need merging function this:

dog = somemergingfunction(animal, dog); 

that produces:

{     eat: function() {         console.log("eating...");     },     nroflegs: 4 } 

one of object literals has replace identical properties.

how do in javascript?

// usage merged = somemergingfunction(a, b, c, d, ...) // keys in earlier args override keys in later args. // somemergingfunction({foo:"bar"}, {foo:"baz"}) //  ==> {foo:"bar"} function somemergingfunction () {   var o = {}   (var = arguments.length - 1; >= 0; --) {     var s = arguments[i]     (var k in s) o[k] = s[k]   }   return o }