Class: Hash

Inherits:
Object show all
Defined in:
lib/lab419/core/hash.rb

Instance Method Summary collapse

Instance Method Details

#hmap(&blk) ⇒ Object 



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# File 'lib/lab419/core/hash.rb', line 3

def hmap &blk
  Hash[ *map(&blk).flatten_once ]
end

#only(*keys) ⇒ Object 



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# File 'lib/lab419/core/hash.rb', line 7

def only *keys
  keys.inject Hash.new do | h, k |
    has_key?( k ) ? h.merge( k => self[k] ) : h
  end
end

#without(*keys) ⇒ Object 



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# File 'lib/lab419/core/hash.rb', line 13

def without *keys
  dup.tap do | h |
    keys.each do | k |
      h.delete k
    end
  end
end