Class: Float

Inherits:
Object
  • Object
show all
Defined in:
lib/pretty_floats.rb

Instance Method Summary collapse

Instance Method Details

#prettify(place_sep: ',', radix_sep: '.', num_places: -1)) ⇒ Object

changes numbers like 1234567 to “1,234,567” or:

> -13321.23.prettify(num_places: 2)

> “-13,321.77”



7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
 
# File 'lib/pretty_floats.rb', line 7

def prettify(place_sep: ',', radix_sep: '.', num_places: -1)
  sign = self < 0 ? '-' : ''

  int = self
    .abs
    .to_i
    .to_s
    .chars
    .reverse
    .each_slice(3)
    .map{|slice| slice.join }
    .join(place_sep)
    .reverse

  max_precision = num_places == -1 ? self.to_s.split('.').last.length : num_places
  float = self % 1
  float = ("%.#{max_precision}f" % float)
    .split('.')
    .last

  sign + int + radix_sep + float
end