我有两个对象字面值：
var animal = {
eat: function() {
console.log("eating...");
}
}
var dog = {
eat: "this has to be replaced when merged",nrOfLegs: 4
}
需要这样的合并功能：
dog = someMergingFunction(animal,dog);
这产生：
{
eat: function() {
console.log("eating...");
},nrOfLegs: 4
}
如何在Javascript中执行此操作？
解决方法
// 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 = {}
for (var i = arguments.length - 1; i >= 0; i --) {
var s = arguments[i]
for (var k in s) o[k] = s[k]
}
return o
}