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Thursday, March 26, 2009

Converting Array to Hash in Ruby

Ruby


A dynamic, open source programming language with a focus on simplicity and productivity. It has an elegant syntax that is natural to read and easy to write.

Some of the samples which in found in net for converting a Array to Hash

Aray to Hash



require "enumerator"

class Array
def to_h
Hash[*enum_with_index.to_a.flatten]
end
end

%w{a b c d}.to_h # => {"a"=>0, "b"=>1, "c"=>2, "d"=>3}



class Array
def to_h(keys)
Hash[*keys.zip(self).flatten]
end
end

a=['1','2','3']
b=['4','5','6']

a.to_h(b)=>{"6"=>"3", "4"=>"1", "5"=>"2"}



a = [1, 2, 3]
Hash[*a.collect { |v| [v, v*2]}.flatten]
=> {1=>2, 2=>4, 3=>6}



class << Hash
def create(keys, values)
self[*keys.zip(values).flatten]
end
end

>> Hash.create(['a', 'b', 'c'], [1, 2, 3])
=> {"a"=>1, "b"=>2, "c"=>3}