javascript：在空格后获取最后一个字符串

Question

如果我有一个字符串，其中的任何项目都可以用空格分隔，即：“ ab abc”或“ ab abc abcd”，我该如何设置一个变量以始终抓住最后一块（第一种情况下为abc） ，第二种情况下是abcd）？

Answer 1

Split the array by whitespace. Grab the last element in the array.

eg.

s = "the fox went and did something";
arr = s.split(" ");
console.log(arr[arr.length-1]);

Answer 2

You can build a simple function like this:

function getLastWord(string) {
  var newString = string.split(" ");
  return newString[newString.length - 1];
}

and the call it with:

var word = getLastWord("My name is Simone"); /* Will result "Simone" */

Answer 3

Try

var str = "ab abc abcd", _str = str.substring(str.lastIndexOf(" ") + 1)

See String.prototype.substring() , String.prototype.lastIndexOf()

 var str = "ab abc abcd", _str = str.substring(str.lastIndexOf(" ") + 1); document.write(_str) 

Answer 4

Basic regular expression

"asdf asdfffffff".match(/\s([^\s]+)$/)[1]

• \\s Matches whitespace
• ([^\\s]+) Matches series of characters that are not a whitespace
• $ Matches end of line