class Hashie::Clash


for keys.
all keys are converted to symbols since many libraries expect symbols explicitly
Because the primary functionality of Clash is to build options objects,
c # => { conditions: { foo: ‘bar’, baz: 123 }, order: :created_at}
c = Hashie::Clash.new.conditions!.foo(‘bar’).baz(123)._end!.order(:created_at)
back out again with the _end! method. Example:
You can dive into a sub-hash by providing a key with a bang and dive
Clash provides another way to create sub-hashes by using bang notation.
c # => {:conditions => {:foo => ‘bar’}, :order => :created_at}
c = Hashie::Clash.new.conditions(:foo => ‘bar’).order(:created_at)
like constructing a complex options hash. Here’s a basic example:
hash, something that’s especially useful if you’re doing something
a Clash allows you to chain together method arguments to build a
A Clash is a “Chainable Lazy Hash”. Inspired by libraries such as Arel,

def _end!

c.baz!._end! # => c
c.baz!.foo(123) # => c[:baz]
c = Hashie::Clash.new.foo('bar')

chaining. For example:
Jump back up a level if you are using bang method 
def _end!
  _parent
end

def id(*args) #:nodoc:

:nodoc: 
def id(*args) #:nodoc:
  method_missing(:id, *args)
end

def initialize(other_hash = {}, parent = nil)

Clash is chained.
convert and, optionally, the parent to which this
Initialize a new clash by passing in a Hash to 
def initialize(other_hash = {}, parent = nil)
  @_parent = parent
  other_hash.each_pair do |k, v|
    self[k.to_sym] = v
  end
end

def merge_store(key, *args) #:nodoc:

:nodoc: 
def merge_store(key, *args) #:nodoc:
  case args.length
  when 1
    val = args.first
    val = self[key].merge(val) if self[key].is_a?(::Hash) && val.is_a?(::Hash)
  else
    val = args
  end
  self[key.to_sym] = val
  self
end

def method_missing(name, *args) #:nodoc:

:nodoc: 
def method_missing(name, *args) #:nodoc:
  name = name.to_s
  if name.match(/!$/) && args.empty?
    key = name[0...-1].to_sym
    if self[key].nil?
      self[key] = Clash.new({}, self)
    elsif self[key].is_a?(::Hash) && !self[key].is_a?(Clash)
      self[key] = Clash.new(self[key], self)
    else
      fail ChainError, 'Tried to chain into a non-hash key.'
    end
    self[key]
  elsif args.any?
    key = name.to_sym
    merge_store(key, *args)
  end
end