Find first index of a string after index

Question

I have a string: "www.google.com.sdg.jfh.sd"

I want to find the first ".s" string that is found after "sdg".

so I have the index of "sdg", by:

var start_index = str.indexOf("sdg"); 

now I need to find the first ".s" index that is found after "sdg"

any help appreciated!

Answer 1

There's a second parameter which controls the starting position of search:

String.prototype.indexOf(arg, startPosition); 

So you can do

str.indexOf('s', start_index); 

Answer 2

This code might be helpful

var string = "www.google.com.sdg.jfh.sd",   preString = "sdg",   searchString = ".s",   preIndex = string.indexOf(preString),   searchIndex = preIndex + string.substring(preIndex).indexOf(searchString); 

You can test it HERE