Use reject instead of delete_if to prevent mutation - #460
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jnunemaker merged 1 commit intoFeb 3, 2016
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Solves #459. Reject returns a new hash instead of mutating.
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Use reject instead of delete_if to prevent mutation
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Solves #459.
Hash#rejectreturns a new hash instead of mutating. http://ruby-doc.org/core-2.2.0/Hash.html#method-i-reject