提取字符串结尾-Javascript

Question

Say I have a string 12.13.14

How can I get the characters after the last dot. (in this case 14)?

There can be more than 2 characters.

Examples would be
34.45.657
10.11.46256

So after the last dot could be any amount of characters.

I've messed around with .slice() but can't get anywhere.

Answer 1

You have a bunch of options. One is split and pop :

 var str = "12.13.14"; var last = str.split('.').pop(); document.body.innerHTML = last; 

Another is a regular expression

 var str = "12.13.14"; var match = /\\.([^.]+)$/.exec(str); var last = match && match[1]; document.body.innerHTML = last; 

Or a rex and replace:

 var str = "12.13.14"; var last = str.replace(/^.*\\.([^.]+)$/, "$1"); document.body.innerHTML = last; 

Or lastIndexOf and substring , as Ananth shows .

Answer 2

var str = '34.45.657';
console.log(str.substring(str.lastIndexOf('.') + 1));

Answer 3

You can do that in multiple ways:

First way:

var myString = '12.13.14';
var lastItem = myString.split('.').pop();
console.log(lastItem);

Second Way:

var myString = '12.13.14';
var lastItem = myString.slice(myString.lastIndexOf('.')+1);
console.log(lastItem);

Third Way:

var myString = '12.13.14';
var lastItem = myString.substring(myString.lastIndexOf('.') + 1);
console.log(lastItem);

and so on ,...

Answer 4

An easy solution would be to use split() which takes a delimiter.

You could split your string on dots and since split returns an array you could use pop() to get the last result.

eg

'34.345.3456'.split('.').pop(); // 3456

Answer 5

Easy solution to get your answer like this

var txt= document.getElementById("Text1").value;
var s1 = txt.lastIndexOf(".");
txt = txt.substring(0, s1);