Import keyword argument values into instance variables

set_ivars.rb

def set_ivars_from_keys(local_binding, *keys)
  keys.each do |key|
    instance_variable_set :"@#{key}", local_binding.local_variable_get(key)
  end
end

def test(a:, b:)
  set_ivars_from_keys binding, :a
end

test(a: 1, b: 2)

@a # 1
@b # 2

####

def set_ivars_automatically(local_binding)
  local_binding.local_variables.each do |key|
    instance_variable_set :"@#{key}", local_binding.local_variable_get(key)
  end
end

def test2(a:, b:)
  set_ivars_automatically binding
end

test2(a: 1, b: 2)

@a # 1
@b # 2

####

def set_ivars_from_block_binding(&block)
  local_binding = block.binding
  local_binding.local_variables.each do |key|
    instance_variable_set :"@#{key}", local_binding.local_variable_get(key)
  end
end

def test3(a:, b:)
  set_ivars_from_block_binding {}
end

test3(a: 1, b: 2)

@a # 1
@b # 2