Re: Making Array#uniq work


#1

the one I
would wish for. Any pointers? I’m running 1.8.2

Hi,

you have to define a ‘hash’ method because Array uses a Hash to remove
the duplicates.

e.g.:

class A
attr_accessor :a,:b
def initialize a
@a=a
@b=Array.new
end
def << item
@b<<item
end

def eql? other
return true if @a==other.a && @b==other.b
end

def == other
return eql?(other)
end

def hash
a.hash * b.hash
end
end

o1=A.new(“a”)
o2=A.new(“a”)
o1<<“o”
o2<<“o”
puts o1==o2
puts o1.eql?(o2)
p [o1,o2].uniq

cheers

Simon