html运行实例（jsck_map_3）-搜寻教程库

代码示例：（标识：jsck_map_3）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 数组</h1>

<p>用旧数组中每个人的全名计算一个新数组：</p>

<p id="demo"></p>

<script>
const persons = [
  {firstname : "Malcom", lastname: "Reynolds"},
  {firstname : "Kaylee", lastname: "Frye"},
  {firstname : "Jayne", lastname: "Cobb"}
];

document.getElementById("demo").innerHTML = persons.map(getFullName);

function getFullName(item) {
  return [item.firstname,item.lastname].join(" ");
}
</script>

</body>
</html>