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Map array to hash, with custom key and value (See related posts)

This code creates a hash from an array, using a block to determine the keys and values of the hash.

class Array
	def map_to_hash
		map { |e| yield e }.inject({}) { |carry, e| carry.merge! e }
	end
end


Use like this:
[1, 2, 3].map_to_hash { |e| {e => e + 100} } # => {1 => 101, 2 => 102, 3 => 103}
to ruby by vinterbleg on Wed Nov 21 05:29:46 -0500 2007

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