frequency of objects in an array using Ruby
- by eastafri
If i had a list of balls each of which has a color property. how can i cleanly get the list of balls with the most frequent color.
[m1,m2,m3,m4]
say,
m1.color = blue
m2.color = blue
m3.color = red
m4.color = blue
[m1,m2,m4] is the list of balls with the most frequent color
My Approach is to do:
[m1,m2,m3,m4].group_by{|ball| ball.color}.each do |samecolor|
my_items = samecolor.count
end
where count is defined as
class Array
def count
k =Hash.new(0)
self.each{|x|k[x]+=1}
k
end
end
my_items will be a hash of frequencies foreach same color group. My implementation could be buggy and i feel there must be a better and more smarter way.
any ideas please?
