19 Oct

Thousand separator regex

s/\d{1,3}(?=(\d{3})+(?!\d))/$&,/g

The amount of code that goes in to formatting numbers can be silly sometimes, especially when you realise it can be done as a regex.

Note that if the number has a DP longer than 2, it’ll format it – I suggest splitting out the DP first, and bash them back together.

You should follow me on Twitter here I'll tweet about JavaScript, HTML 5 and other such gems (amongst usual tweet-splurges)

2 Responses to “Thousand separator regex”

Amazing! Recursion in Regexps November 6th, 2007 at 10:07 pm

[...] GeekTool output, you need to patch the source to interpret command output as utf-8. Original Post Sample Implementation [...]
Adam Backstrom February 10th, 2011 at 11:50 pm

Ahhh, thanks for that. There are some truly awful code samples around for adding thousand separators to a number, this left me with a warm fuzzy feeling at the end of the day.