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##
# Numeric
#
# ISO 15.2.7
class Numeric
include Comparable
##
# Returns the receiver simply.
#
# ISO 15.2.7.4.1
def +@
self
end
##
# Returns the receiver's value, negated.
#
# ISO 15.2.7.4.2
def -@
0 - self
end
##
# Returns the absolute value of the receiver.
#
# ISO 15.2.7.4.3
def abs
if self < 0
-self
else
self
end
end
end
##
# Integral
#
# mruby special - module to share methods between Floats and Integers
# to make them compatible
module Integral
##
# Calls the given block once for each Integer
# from +self+ downto +num+.
#
# ISO 15.2.8.3.15
def downto(num, &block)
return to_enum(:downto, num) unless block
i = self.to_i
while i >= num
block.call(i)
i -= 1
end
self
end
##
# Returns self + 1
#
# ISO 15.2.8.3.19
def next
self + 1
end
# ISO 15.2.8.3.21
alias succ next
##
# Calls the given block +self+ times.
#
# ISO 15.2.8.3.22
def times &block
return to_enum :times unless block
i = 0
while i < self
block.call i
i += 1
end
self
end
##
# Calls the given block once for each Integer
# from +self+ upto +num+.
#
# ISO 15.2.8.3.27
def upto(num, &block)
return to_enum(:upto, num) unless block
i = self.to_i
while i <= num
block.call(i)
i += 1
end
self
end
##
# Calls the given block from +self+ to +num+
# incremented by +step+ (default 1).
#
def step(num=nil, step=1, &block)
raise ArgumentError, "step can't be 0" if step == 0
return to_enum(:step, num, step) unless block
i = if num.kind_of? Float then self.to_f else self end
if num == nil
while true
block.call(i)
i+=step
end
return self
end
if step > 0
while i <= num
block.call(i)
i += step
end
else
while i >= num
block.call(i)
i += step
end
end
self
end
end
##
# Integer
#
# ISO 15.2.8
class Integer
include Integral
##
# Returns the receiver simply.
#
# ISO 15.2.8.3.14
def ceil
self
end
##
# Returns the receiver simply.
#
# ISO 15.2.8.3.17
def floor
self
end
##
# Returns the receiver simply.
#
# ISO 15.2.8.3.24
alias round floor
##
# Returns the receiver simply.
#
# ISO 15.2.8.3.26
alias truncate floor
end
##
# Float
#
# ISO 15.2.9
class Float
# mruby special - since mruby integers may be upgraded to floats,
# floats should be compatible to integers.
include Integral
end
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