正序
for (var i in arr.sort()) {
console.log(`Hello, `+arr[i]+`!`);
}
倒序
arr.reverse();
倒序更新
arr.sort()
for (var i in arr.reverse()) {
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年轮与灯
正序
for (var i in arr.sort()) {
console.log(`Hello, `+arr[i]+`!`);
}
倒序
for (var i in arr.sort()) {
arr.reverse();
console.log(`Hello, `+arr[i]+`!`);
}