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|
##
# Range
#
# ISO 15.2.14
class Range
##
# Range is enumerable
#
# ISO 15.2.14.3
include Enumerable
##
# 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.begin
last = self.end
if val.kind_of?(Integer) && last.nil?
i = val
while true
block.call(i)
i += 1
end
return self
end
if val.kind_of?(String) && last.nil?
if val.respond_to? :__upto_endless
return val.__upto_endless(&block)
else
str_each = true
end
end
if val.kind_of?(Integer) && last.kind_of?(Integer) # integers are special
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
##
# call-seq:
# rng.to_a -> array
# rng.entries -> array
#
# Returns an array containing the items in the range.
#
# (1..7).to_a #=> [1, 2, 3, 4, 5, 6, 7]
# (1..).to_a #=> RangeError: cannot convert endless range to an array
def to_a
a = __num_to_a
return a if a
super
end
alias entries to_a
end
|
