Regex: Match all decimals but the first one

Question

What would the regex pattern be to match all decimals but the first one? I'm using javascript's replace(), and would like to remove all but the first decimal in a string.

Examples:

1.2.3.4.5 --> 1.2345

.2.3.4.5 --> .2345

1234.. --> 1234.

Answer 1

You could do something like this:

function parseAndNormalizeDecimal(dec) {
  var i = 0;
  var result = dec.replace(/\./g, function(all, match) { return i++===0 ? '.' : ''; });
  return result;
}