Ruby Language Metaprogramming Implementing "with" using instance evaluation
Example
Many languages feature a with statement that allows programmers to omit the receiver of method calls.
with can be easily emulated in Ruby using instance_eval:
def with(object, &block)
object.instance_eval &block
end
The with method can be used to seamlessly execute methods on objects:
hash = Hash.new
with hash do
store :key, :value
has_key? :key # => true
values # => [:value]
end
