formatting number with commas

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Member function: str.AddCommasToNumbers

Code:

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function$
;Adds commas to large numbers.  
;Note: the number must become a string before sending to this funcion.

;str s="1234567.1234567"
;s.AddCommasToNumbers
;out s


strrev this
this.replacerx("(\d{3})(?=\d+($|[^\.\w]))" "$1,")
strrev this