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futureperfect/gist:066c6c320c9d0930fe648990a86ba4f4

Created January 9, 2018 03:41
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  1. futureperfect revised this gist Jan 9, 2018. No changes.
  2. futureperfect created this gist Jan 9, 2018.
    24 changes: 24 additions & 0 deletions gistfile1.txt
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    # What methods does a class implement?
    > Time.methods
    => [:!, :!=, :!~, :<, :<=, :<=>, :==, :===, :=~, :>, :>=, :__id__, :__send__, :allocate, :ancestors, :at, :autoload, :autoload?, :class, :class_eval, :class_exec, :class_variable_defined?, :class_variable_get, :class_variable_set, :class_variables, :clone, :const_defined?, :const_get, :const_missing, :const_set, :constants, :define_singleton_method, :deprecate_constant, :display, :dup, :enum_for, :eql?, :equal?, :extend, :freeze, :frozen?, :gm, :hash, :include, :include?, :included_modules, :inspect, :instance_eval, :instance_exec, :instance_method, :instance_methods, :instance_of?, :instance_variable_defined?, :instance_variable_get, :instance_variable_set, :instance_variables, :is_a?, :itself, :kind_of?, :local, :method, :method_defined?, :methods, :mktime, :module_eval, :module_exec, :name, :new, :nil?, :now, :object_id, :prepend, :private_class_method, :private_constant, :private_instance_methods, :private_method_defined?, :private_methods, :protected_instance_methods, :protected_method_defined?, :protected_methods, :public_class_method, :public_constant, :public_instance_method, :public_instance_methods, :public_method, :public_method_defined?, :public_methods, :public_send, :remove_class_variable, :remove_instance_variable, :respond_to?, :send, :singleton_class, :singleton_class?, :singleton_method, :singleton_methods, :superclass, :taint, :tainted?, :tap, :to_enum, :to_s, :trust, :untaint, :untrust, :untrusted?, :utc]

    # That's a ton of stuff! Most of it doesn't look to be time-related. Most of it looks like things that we get from `Object`.
    # What if we want to see the things that Time implements that don't come from `Object`?

    > Time.methods - Object.methods
    => [:at, :now, :utc, :gm, :local, :mktime]

    # That's a much more reasonable to read.

    # Finally, what if I'm looking for a method that has a name that I *kind of* remember, but I'm not quite sure what it was

    > a = [[1, 2, 3]]
    => [[1, 2, 3]]

    # Didn't arrays have a thing that let me make them flat (i.e. not nested?)
    > a.methods.grep /flat/
    => [:flatten, :flatten!, :flat_map]

    # Hmm... `:flatten` looks like the one I was looking for.
    > a.flatten
    => [1, 2, 3]