JS實現字符串翻轉的方法分析

1. 字符串的完全翻轉:

function reverseStr(param){
var arr = param.split(" ");
var newArr = [];
for(i=0;i<arr.length;i++){
newArr[arr.length-i] = arr[i];
}
return newArr.join(" ");
}
document.write(reverseStr("smile at life"));

結果：efil ta elims

2. 翻轉字符串中單詞順序,但單詞字母順序不變:

function reverseStr(param){
var arr = param.split(" ");
var newArr = [];
for(i=0;i<arr.length;i++){
newArr[arr.length-i] = arr[i];
}
return newArr.join(" ");
}
document.write(reverseStr("smile at life"));

結果：life at smile