javascript - Get Second to last character position from string using jQuery - Stack Overflow

admin管理员组

文章数量:1291098

I have a dynamically formed string like - part1.abc.part2.abc.part3.abc

In this string I want to get the substring based on second to last occurrence of "." so that I can get and part3.abc

Is there any direct method available to get this?

I have a dynamically formed string like - part1.abc.part2.abc.part3.abc

In this string I want to get the substring based on second to last occurrence of "." so that I can get and part3.abc

Is there any direct method available to get this?

• javascript
• jquery
• string
• substring
• indexof

Share Improve this question Follow asked Nov 5, 2013 at 5:03 OkkyOkky 10.5k1515 gold badges7777 silver badges123123 bronze badges 1

• Are the lengths of each part dynamic? Or are they known? – William Riley Commented Nov 5, 2013 at 5:08

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 8

You could use:

'part1.abc.part2.abc.part3.abc'.split('.').splice(-2).join('.'); // 'part3.abc'

You don't need jQuery for this.

Nothing to do with jQuery. You can use a regular expression:

var re = /[^\.]+\.[^\.]+$/;
var match = s.match(re);
if (match) {
  alert(match[0]);
}

or

'part1.abc.part2.abc.part3.abc'.match(/[^.]+\.[^.]+$/)[0];

but the first is more robust.

You could also use split and get the last two elements from the resulting array (if they exist).

本文标签： javascriptGet Second to last character position from string using jQueryStack Overflow