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Versions: 10
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Contents
class Range
# Uses the Range#umbrella method to determine
# if another Range is _anywhere_ within this Range.
#
# (1..3).within?(0..4) #=> true
#
# CREDIT: Trans
def within?(rng)
case rng.umbrella(self)
when [0,0], [-1,0], [0,-1], [-1,-1]
return true
else
return false
end
end
# Returns a two element array of the relationship
# between two Ranges.
#
# Diagram:
#
# Relationship Returns
#
# self |-----------|
# r |-----------| [0,0]
#
# self |-----------|
# r |---------| [-1,-1]
#
# self |---------|
# r |-----------| [1,1]
#
# self |-----------|
# r |----------| [-1,0]
#
# self |-----------|
# r |-----------| [-1,1]
#
# etc.
#
# Example:
#
# (0..3).umbrella(1..2) #=> [-1,-1]
#
# CREDIT: Trans, Chris Kappler
def umbrella(r)
s = first <=> r.first
e = r.last <=> last
if e == 0
if r.exclude_end? and exclude_end?
e = r.max <=> max
else
e = (r.exclude_end? ? 0 : 1) <=> (exclude_end? ? 0 : 1)
end
end
return s,e
end
end
Version data entries
10 entries across 10 versions & 1 rubygems