Get a substring from a string using a wildcard in javascript

Question

I have a string like /test/file/sometext/public/image and a second string /test1/file/sometext1/public/image1 .

I want to get the substring starting from file and ending on public .

So the first string should return file/sometext/public/ and from the 2nd string it should return file/sometext1/public/ .

In every string this file and public is static.

How will I do this in javascript?

Basically I need this

str = '/test/file/sometext/public/image';
var str1 = str.replace("file/sometext/public/", "");

But I need here a wildcard so that sometext can be replaces whatever text comes between file and public . Hope you get my point.

Answer 1

You could use split() to splits a string into an array of strings, with slice() that returns a shallow copy of a portion of an array into a new array object and finally the join() to joins all elements of an array into a final string :

 var parts = '/test/file/sometext/public/image'.split('/'); console.log( parts.slice(2, 5).join('/') ); 

Answer 2

If all strings follow the same folder structure you can split them in to an array and rebuild it with the required parts, like this:

 var arr = str = '/test/file/sometext/public/image'.split('/'); var str1 = arr[2] + '/' + arr[3] + '/' + arr[4] + '/'; console.log(str1); 

Answer 3

You can do this by using Regular Expression.

 var str = '/test/file/sometext/public/image'; var reg = /file\\/[^\\/]*\\/public/i; var replace = str.replace(reg, 'something'); console.log('before',str); console.log('after',replace);