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|
class Array
def uniq!
ary = self.dup
result = []
while ary.size > 0
result << ary.shift
ary.delete(result.last)
end
if result.size == self.size
nil
else
self.replace(result)
end
end
def uniq
ary = self.dup
ary.uniq!
ary
end
def -(elem)
raise TypeError, "can't convert #{elem.class.to_s} into Array" unless elem.class == Array
hash = {}
array = []
elem.each { |x| hash[x] = true }
self.each { |x| array << x unless hash[x] }
array
end
def |(elem)
raise TypeError, "can't convert #{elem.class.to_s} into Array" unless elem.class == Array
ary = self + elem
ary.uniq! or ary
end
def &(elem)
raise TypeError, "can't convert #{elem.class.to_s} into Array" unless elem.class == Array
hash = {}
array = []
elem.each{|v| hash[v] = true }
self.each do |v|
if hash[v]
array << v
hash.delete v
end
end
array
end
def flatten(depth=nil)
ar = []
self.each do |e|
if e.is_a?(Array) && (depth.nil? || depth > 0)
ar += e.flatten(depth.nil? ? nil : depth - 1)
else
ar << e
end
end
ar
end
def flatten!(depth=nil)
modified = false
ar = []
self.each do |e|
if e.is_a?(Array) && (depth.nil? || depth > 0)
ar += e.flatten(depth.nil? ? nil : depth - 1)
modified = true
else
ar << e
end
end
if modified
self.replace(ar)
else
nil
end
end
def compact
result = self.dup
result.compact!
result
end
def compact!
result = self.select { |e| e != nil }
if result.size == self.size
nil
else
self.replace(result)
end
end
end
|
