Replace all except first

Question

Is it possible to replace all occurrences except the first one? So 123.45.67..89.0 should become 123.4567890.

Edit: I'm looking for a regex. I know how to do it with concat or using the index.

Answer 1

You could use a positive lookbehind to achieve this:

(?<=\..*)\.

So your code would be

"123.45.67..89.0".replace(/(?<=\..*)\./g, '');

Answer 2

Using JS:

var str = "123.45.67.89.0";

var firstOccuranceIndex = str.search(/\./) + 1; // Index of first occurance of (.)

var resultStr = str.substr(0, firstOccuranceIndex) + str.slice(firstOccuranceIndex).replace(/\./g, ''); // Splitting into two string and replacing all the dots (.'s) in the second string

console.log(resultStr);

Hope this helps :)