add thousands separators to numbers

jmoses (jon) — Fri, 09 Sep 2005 22:32:56 GMT

I've finally figured out how to add thousands separators.

If there's a built in for this (like a `sprintf` parameters) I don't want to hear it. I just don't, ok?



def ts( st )

  st = st.reverse

  r = ""

  max = if st[-1].chr == '-'

    st.size - 1

  else

    st.size

  end

  if st.to_i == st.to_f

    1.upto(st.size) {|i| r << st[i-1].chr ; r << ',' if i%3 == 0 and i < max}

  else

    start = nil

    1.upto(st.size) {|i|

      r << st[i-1].chr

      start = 0 if r[-1].chr == '.' and not start

      if start

        r << ',' if start % 3 == 0 and start != 0  and i < max

        start += 1

      end

    }

  end

  r.reverse

end

That's it.



puts ts('100')

puts ts('1')

puts ts('1000')

puts ts('1000000.01')

puts ts('100046546510000.022435451')

puts ts('-100')

puts ts('-1')

puts ts('-1000')

puts ts('-1000000.01')

puts ts('-100046546510000.022435451')

outputs:



100

1

1,000

1,000,000.01

100,046,546,510,000.022435451

-100

-1

-1,000

-1,000,000.01

-100,046,546,510,000.022435451

It's ugly, yeah, but it works.

Python Comma Separated

jamwt (Jamie Turner) — Thu, 01 Sep 2005 17:39:14 GMT

Separate a list of string in english-language list fashion, just like the Ruby snippet listed earlier.



def textList(listtext, sep1=', ', sep2=', and '):

        return (len(listtext) > 1 

        and ("%s%s%s" % (sep1.join(listtext[:-1]), sep2, listtext[-1])) 

        or listtext[0])

['one'] -> "one"
['one', 'two', 'three'] -> "one, two, and three"

DZone Snippets: separator code

add thousands separators to numbers

Python Comma Separated