Method: Kernel#instance_extract

Defined in:
lib/core/facets/kernel/instance_extract.rb

#instance_extract(hash) ⇒ Object

Like ‘instance_assign`, but only assigns an instance variable if it does not already exist.

@a = 9
instance_extract('@a'=>1, '@b'=>2)
@a   #=> 9
@b   #=> 2

CREDIT: T. Yamada



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# File 'lib/core/facets/kernel/instance_extract.rb', line 13

def instance_extract(hash)
  hash.each do |k,v|
    k = "@#{k}" if k !~ /^@/
    instance_variable_set(k, v) unless instance_variable_defined?(k)
  end
  self
end