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barnett/count.rb

Last active July 13, 2016 02:35
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Ruby Array#count magic
Raw
count.rb
# Data
# We need to get a count for # of votes for different candidates
>> VOTES = {
?> "Napoleon" => "Pedro",
?> "Don" => "Summer",
?> "Deb" => "Pedro",
?> "Randy" => "Summer",
?> "Trisha" => "Pedro",
?> }
=> {"Napoleon"=>"Pedro", "Don"=>"Summer", "Deb"=>"Pedro", "Randy"=>"Summer", "Trisha"=>"Pedro"}
# Good
>> VOTES.values.select{|v| v == "Pedro"}.size
=> 3
# Better
>> VOTES.values.count{|v| v == "Pedro"}
=> 3
# Best
>> VOTES.values.count("Pedro")
=> 3
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