Class: Hash

Inherits:
Object
  • Object
show all
Defined in:
lib/aerogel/core/core_ext/hash.rb

Overview

Core extensions to Hash.

Instance Method Summary collapse

Instance Method Details

#except(*keys) ⇒ Object

Returns hash containing all elements except those with specified keys.



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# File 'lib/aerogel/core/core_ext/hash.rb', line 24

def except( *keys )
  dup.except!( *keys )
end

#except!(*keys) ⇒ Object

Modifies and returns hash containing all elements except those with specified keys.



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# File 'lib/aerogel/core/core_ext/hash.rb', line 30

def except!( *keys )
  keys.each do |k|
    if String === k || Symbol === k
     delete k.to_sym
     delete k.to_s
    else
      delete k
    end
  end
  self
end

#only(*keys) ⇒ Object

Returns hash containing only elements listed in args.



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# File 'lib/aerogel/core/core_ext/hash.rb', line 11

def only( *keys )
  self.select{|key,v| [*keys].include? key }
end

#only!(*keys) ⇒ Object

Modifies and returns hash containing only elements listed in args.



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# File 'lib/aerogel/core/core_ext/hash.rb', line 17

def only!( *keys )
  self.select!{|key,v| [*keys].include? key }
  self
end

#to_html_params ⇒ Object

Returns Hash converted to a string of HTML tag attributes.



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# File 'lib/aerogel/core/core_ext/hash.rb', line 44

def to_html_params
  self.map{|n, v| v.nil? ? "#{n}" : "#{n}=\"#{v}\""}.join(" ")
end