循环访问对象文字并替换字符串

有人能帮我讲解如何使用jQuery$.each遍历对象文本并替换每个项目中匹配的字符串的语法吗？

如果我有：

var foo = {
    item1: "Mary had a little lamb",
    item2: "Whose fleece was white as snow",
    item3: "Johnny ha a little lamb",
    item4: "What's the deal with lambs?"
}

并且我想将单词lamb替换为lion，在$.each函数中，我要替换该项吗？

我已尝试：

$.each(foo, function(key, value){
     return value.replace(/lamb/, "lion");
}

但它不会替换这些项目？

---

解决方案

使用字符串replace方法替换文本&&；更新对象的值

数据-lang="js"数据-隐藏="假"数据-控制台="真"数据-巴贝尔="假">

var foo = {
  item1: "Mary had a little lamb",
  item2: "Whose fleece was white as snow",
  item3: "Johnny has a little lamb",
  item4: "What's the deal with lambs?"
}
$.each(foo, function(i) {
  foo[i] = foo[i].replace('lamb', 'lion')
});
console.log(foo)

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>