class Range
Public instance methods
Source code GitHub
# File activesupport/lib/active_support/core_ext/range/overlap.rb, line 31
def _empty_range?(b, e, excl)
return false if b.nil? || e.nil?
comp = b <=> e
comp.nil? || comp > 0 || (comp == 0 && excl)
end
Also aliased as:
overlaps?
.
Source code GitHub
# File activesupport/lib/active_support/core_ext/range/overlap.rb, line 8
def overlap?(other)
raise TypeError unless other.is_a? Range
self_begin = self.begin
other_end = other.end
other_excl = other.exclude_end?
return false if _empty_range?(self_begin, other_end, other_excl)
other_begin = other.begin
self_end = self.end
self_excl = self.exclude_end?
return false if _empty_range?(other_begin, self_end, self_excl)
return true if self_begin == other_begin
return false if _empty_range?(self_begin, self_end, self_excl)
return false if _empty_range?(other_begin, other_end, other_excl)
true
end
Alias for:
overlap?
.
Returns the sole item in the range. If there are no items, or more than one item, raises Enumerable::SoleItemExpectedError
.
(1..1).sole # => 1
(2..1).sole # => Enumerable::SoleItemExpectedError: no item found
(..1).sole # => Enumerable::SoleItemExpectedError: infinite range cannot represent a sole item
Source code GitHub
# File activesupport/lib/active_support/core_ext/range/sole.rb, line 10
def sole
if self.begin.nil? || self.end.nil?
raise ActiveSupport::EnumerableCoreExt::SoleItemExpectedError, "infinite range '#{inspect}' cannot represent a sole item"
end
super
end