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##
# Range
#
# ISO 15.2.14
class Range
##
# Calls the given block for each element of +self+
# and pass the respective element.
#
# ISO 15.2.14.4.4
def each(&block)
return to_enum :each unless block
val = self.first
last = self.last
# numerics are special
if (val.kind_of?(Fixnum) || val.kind_of?(Float)) && (last.kind_of?(Fixnum) || last.kind_of?(Float))
lim = last
lim += 1 unless exclude_end?
i = val
while i < lim
block.call(i)
i += 1
end
return self
end
if val.kind_of?(String) && last.kind_of?(String) # strings are special
if val.respond_to? :upto
return val.upto(last, exclude_end?, &block)
else
str_each = true
end
end
raise TypeError, "can't iterate" unless val.respond_to? :succ
return self if (val <=> last) > 0
while (val <=> last) < 0
block.call(val)
val = val.succ
if str_each
break if val.size > last.size
end
end
block.call(val) if !exclude_end? && (val <=> last) == 0
self
end
# redefine #hash 15.3.1.3.15
def hash
h = first.hash ^ last.hash
h += 1 if self.exclude_end?
h
end
end
##
# Range is enumerable
#
# ISO 15.2.14.3
class Range
include Enumerable
def max(&block)
val = self.first
last = self.last
# numerics are special
if (val.kind_of?(Fixnum) || val.kind_of?(Float)) && (last.kind_of?(Fixnum) || last.kind_of?(Float))
return nil if val > last
return nil if val == last && exclude_end?
max = last
max -= 1 if exclude_end?
max = val if block && block.call(val, last) > 0
return max
end
max = nil
each do |item|
max =
if max.nil?
item
elsif block && block.call(max, item) > 0
item
elsif item > max
item
else
max
end
end
max
end
def min(&block)
val = self.first
last = self.last
# numerics are special
if (val.kind_of?(Fixnum) || val.kind_of?(Float)) && (last.kind_of?(Fixnum) || last.kind_of?(Float))
return nil if val > last
return nil if val == last && exclude_end?
min = val
if block && block.call(val, last) > 0
min = last
min -= 1 if exclude_end?
end
return min
end
min = nil
each do |item|
min =
if min.nil?
item
elsif block && block.call(min, item) < 0
item
elsif item < min
item
else
min
end
end
min
end
end
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