Version 3 of commas added to numbers

Updated 2005-11-10 00:12:59

What: commas added to numbers

 Where: From the contact
 Description: Tiny Tcl regsub comma to add commas to numbers, taking
        leading white space, - or +, and decimal points into account.
 Updated:
 Contact: mailto:[email protected] (John Allen)

In Bag of algorithms there's a one-liner alternative by Peter Spjuth (in the Tcl chatroom, 2004-10-05) using modern regexp features:

 proc commify number {regsub -all {\d(?=(\d{3})+($|\.))} $number {\0,}}

Comment: commify only works for numbers with less than 3 digits after decimal point e.g.

 () 4 % commify 1234567.123456
 1,234,567.123,456

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