I have two array of objects for example:
a1 = [obj1, obj2 , obj3]
a2 = [obj4, obj5, obj6]
Each array has different objects of the same class. I want to check whether they have the same attribute value (obj1.att == obj4.att) in a single iteration.
a1.each will do iteration on a single array. I don't want to use for or while loop. I want a rails way to do that.
I guess it makes to sense to check that array sizes match before iterating:
same_att = a1.size == a2.size && a1.map(&:att) == a2.map(&:att)
Same idea, a lazy implementation (only if you have lots of elements in the arrays):
same_att = a1.size == a2.size && a1.lazy.zip(a2).all? { |x, y| x.att == y.att }
Try following
a1.map(&:att) == a2.map(&:att)
Edited Remember following thing
[1,2,3] == [1,2,3] #true
AND
[1,2,3] == [2,3,1] #false
Hence it will only returns true when att attribute of obj1, obj4 AND obj2, obj5 AND obj3, obj6 are same.
a1.each {|i| a2.select {|k| k.att == i.att }}
