获取字符串的最后3个字符 [英] Getting the last 3 characters of a string

问题描述

请问，如何在javascript中提取字符串的最后三(3)个字符?
可以说:
我有:var name;

如果重新分配名称，则名称始终可以更改；我想从右边获取最后的三(3).例如，如果名称="JAMES"，我想获取"MES"

谢谢.

Please, how can I extract the last three(3) characters for a changing string in javascript?
lets say:
I have: var name;

name can alsways changed if it is reassigned; I want to get the last three(3) from the right. example if name = "JAMES", I want to get "MES"

Thanks.

推荐答案

使用string.substring.

参见 http://www.w3schools.com/jsref/jsref_substring.asp [

Use string.substring.

See http://www.w3schools.com/jsref/jsref_substring.asp[^]

尝试 ^ ].

顺便说一句，AFAIR，不支持跨浏览器.因此，请进行相应的检查/使用看起来现在所有浏览器都支持它.现在 [ ^ ].

嗯，试试看:

Try Javascript substring method[^].

BTW, AFAIR, it''s not crossbrowser supported. So, do check/use it accordingly Looks like it is supported by all browsers now[^].

Hmmm, try this:

name.substr(-3); // should return MES

查看此网页上的子字符串方法；
http://www.electrictoolbox.com/javascript-substr/ [

Check out this web page for substrings method;
http://www.electrictoolbox.com/javascript-substr/[^]

So maybe at first you can get the string length by using name.length and then use the substring method.

这篇关于获取字符串的最后3个字符的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！