blob: 6d22d2785d45a5f55d24c5ccc10118facae74009 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
class Float < Numeric
# call-seq:
# flt.to_d -> bigdecimal
#
# Convert +flt+ to a BigDecimal and return it.
#
# require 'bigdecimal'
# require 'bigdecimal/util'
#
# 0.5.to_d
# # => #<BigDecimal:1dc69e0,'0.5E0',9(18)>
#
def to_d
BigDecimal(self.to_s)
end
end
class String
# call-seq:
# string.to_d -> bigdecimal
#
# Convert +string+ to a BigDecimal and return it.
#
# require 'bigdecimal'
# require 'bigdecimal/util'
#
# "0.5".to_d
# # => #<BigDecimal:1dc69e0,'0.5E0',9(18)>
#
def to_d
BigDecimal(self)
end
end
class BigDecimal < Numeric
# call-seq:
# a.to_digits -> string
#
# Converts a BigDecimal to a String of the form "nnnnnn.mmm".
# This method is deprecated; use BigDecimal#to_s("F") instead.
#
# require 'bigdecimal'
# require 'bigdecimal/util'
#
# d = BigDecimal.new("3.14")
# d.to_digits
# # => "3.14"
def to_digits
if self.nan? || self.infinite? || self.zero?
self.to_s
else
i = self.to_i.to_s
_,f,_,z = self.frac.split
i + "." + ("0"*(-z)) + f
end
end
end
class Rational < Numeric
# call-seq:
# r.to_d -> bigdecimal
# r.to_d(sig) -> bigdecimal
#
# Converts a Rational to a BigDecimal. Takes an optional parameter +sig+ to
# limit the amount of significant digits.
#
# r = (22/7.0).to_r
# # => (7077085128725065/2251799813685248)
# r.to_d
# # => #<BigDecimal:1a52bd8,'0.3142857142 8571427937 0154144999 105E1',45(63)>
# r.to_d(3)
# # => #<BigDecimal:1a44d08,'0.314E1',18(36)>
def to_d(nFig=0)
num = self.numerator.to_s
if nFig<=0
nFig = BigDecimal.double_fig*2+1
end
BigDecimal.new(num).div(self.denominator,nFig)
end
end
|
