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default 

        # Hash.default

(from ruby core)
---
    hash.default -> object
    hash.default(key) -> object

---

Returns the default value for the given `key`. The returned value will
be determined either by the default proc or by the default value. See
[Default Values](#class-Hash-label-Default+Values).

With no argument, returns the current default value:
    h = {}
    h.default # => nil

If `key` is given, returns the default value for `key`, regardless of
whether that key exists:
    h = Hash.new { |hash, key| hash[key] = "No key #{key}"}
    h[:foo] = "Hello"
    h.default(:foo) # => "No key foo"

This is MURDOC! A Ruby documentation browser inspired by Smalltalk-80. It allows you to learn about Ruby by browsing through its class hierarchies, and see any of its methods.