Sha256: 95471b757c4d91ef1c34c58a8d16f28bf59898acf754d9d284322b3c2f688adf
Contents?: true
Size: 1.35 KB
Versions: 16
Compression:
Stored size: 1.35 KB
Contents
# HoboSupport - Metaid
doctest_require: '../../lib/hobosupport'
{.hidden}
Why the Luck Stiff's essential meta-programming additions to Object. These are probably distributed elsewhere, but they're small enough to throw them in to HoboSupport and remove an external dependency.
## `Object#metaclass`
Returns the "metaclass", "eigenclass" or "singleton class" of a given ruby Object
>> o = Object.new
>> def o.foo; ;123; end
>> o.foo
=> 123
>> o.metaclass.method_defined?(:foo)
=> true
## `Object#meta_eval`
* `object.meta_eval(string)`
* `object.meta_eval { block }`
Evaluates ruby source or a block in the context of the metaclass.
>> File.meta_eval "alias_method :b, :basename"
>> File.b "a/b"
=> "b"
And with a block
>> File.meta_eval { alias_method :b2, :basename }
>> File.b2 "a/b"
=> "b"
## `Object#metaclass_eval`
* `object.metaclass_eval(string)`
* `object.metaclass_eval { block }`
Like `#meta_eval`, but does a `class_eval` instead of an `instance_eval`
>> File.metaclass_eval "def b3(path); basename(path); end"
>> File.b3 "a/b"
=> "b"
And with a block
>> File.metaclass_eval { def b4(path); basename(path); end }
>> File.b4 "a/b"
=> "b"
## `Object#meta_def`
>> String.meta_def(:backwards_new) { |s| s.reverse }
>> String.backwards_new "strange"
=> "egnarts"
Version data entries
16 entries across 16 versions & 1 rubygems