Add a thousands separator to a total with Javascript or jQuery?

Question

I have a function that sums a column of data in an html table. It does so admirably only I would like to have it put the commas in there that are needed to separate the thou

Answer 1

This is how I do it:

// 2056776401.50 = 2,056,776,401.50
function humanizeNumber(n) {
  n = n.toString()
  while (true) {
    var n2 = n.replace(/(\d)(\d{3})($|,|\.)/g, '$1,$2$3')
    if (n == n2) break
    n = n2
  }
  return n
}

Or, in CoffeeScript:

# 2056776401.50 = 2,056,776,401.50
humanizeNumber = (n) ->
  n = n.toString()
  while true
    n2 = n.replace /(\d)(\d{3})($|,|\.)/g, '$1,$2$3'
    if n == n2 then break else n = n2
  n