Class: Instance

Inherits:
Object show all
Includes:
Enumerable
Defined in:
lib/core/facets/instance.rb

Overview

Instance Class

class Friend
  attr_accessor :name, :age, :phone
  def initialize(name, age, phone)
    @name, @age, @phone = name, age, phone
  end
end

f1 = Friend.new("John", 30, "555-1212")
f1.instance

f1.instance.update({:name=>'Jerry'})
f1.instance

Instance Method Summary collapse

Methods included from Enumerable

#accumulate, #accumulate_all, #cluster_by, #compact_map, #count, #defer, #each_by, #each_with_object, #every, #every!, #ewise, #exclude?, #expand, #filter, #find_yield, #frequency, #graph, #group_by, #has?, #map_by, #map_send, #map_with, #map_with_index, #modulate, #none?, #occur, #one?, #per, #purge, #recursively, #sum, #take, #threaded_map, #threaded_map_send, #to_h_assoc, #to_h_auto, #to_h_flat, #to_h_multi, #to_h_splat, #uniq_by, #visit

Constructor Details

#initialize(delegate) ⇒ Instance

Returns a new instance of Instance.



34
35
36
 
# File 'lib/core/facets/instance.rb', line 34

def initialize(delegate)
  @delegate = delegate
end

Instance Method Details

#<<(pair) ⇒ Object 



92
93
94
95
96
 
# File 'lib/core/facets/instance.rb', line 92

def <<(pair)
  name, value = *pair
  name = atize(name)
  @delegate.instance_variable_set(name, value)
end

#[](name) ⇒ Object 



80
81
82
83
 
# File 'lib/core/facets/instance.rb', line 80

def [](name)
  name = atize(name)
  @delegate.instance_variable_get(name)
end

#[]=(name, value) ⇒ Object 



86
87
88
89
 
# File 'lib/core/facets/instance.rb', line 86

def []=(name, value)
  name = atize(name)
  @delegate.instance_variable_set(name,value)
end

#each ⇒ Object 



44
45
46
47
48
 
# File 'lib/core/facets/instance.rb', line 44

def each
  @delegate.instance_variables.each do |name|
    yield(name[1..-1].to_sym, @delegate.instance_variable_get(name))
  end
end

#eval(*a, &b) ⇒ Object

Instance evaluation.



146
147
148
 
# File 'lib/core/facets/instance.rb', line 146

def eval(*a,&b)
  @delegate.instance_eval(*a,&b)
end

#instance_delegate ⇒ Object 



39
40
41
 
# File 'lib/core/facets/instance.rb', line 39

def instance_delegate
  @delegate
end

#keys ⇒ Object

Instance vairable names as symbols.



125
126
127
128
129
 
# File 'lib/core/facets/instance.rb', line 125

def keys
  @delegate.instance_variables.collect do |name|
    name[1..-1].to_sym
  end
end

#names ⇒ Object

Instance variable names as strings.



132
133
134
135
136
 
# File 'lib/core/facets/instance.rb', line 132

def names
  @delegate.instance_variables.collect do |name|
    name[1..-1]
  end
end

#to_h(at = false) ⇒ Object Also known as: to_hash

Return instance variables with values as a hash.

class X
  def initialize(a,b)
    @a, @b = a, b
  end
end

x = X.new(1,2)

x.instance.to_h  #=> { :a=>1, :b=>2 }



62
63
64
65
66
67
68
69
70
71
72
73
74
 
# File 'lib/core/facets/instance.rb', line 62

def to_h(at=false)
  h = {}
  if at
    @delegate.instance_variables.each do |name|
      h[name] = @delegate.instance_variable_get(name)
    end
  else
    each do |key, value|
      h[key] = value
    end
  end
  h
end

#update(hash) ⇒ Object Also known as: assign

Set instance variables given a hash.

instance.update('@a'=>1, '@b'=>2)
@a   #=> 1
@b   #=> 2

Also, @ sign is not neccessary.

instance.update(:a=>1, :b=>2)
@a   #=> 1
@b   #=> 2



110
111
112
113
114
 
# File 'lib/core/facets/instance.rb', line 110

def update(hash)
  hash.each do |pair|
    self << pair
  end
end

#values ⇒ Object

Instance variable values.



139
140
141
142
143
 
# File 'lib/core/facets/instance.rb', line 139

def values
  @delegate.instance_variables.collect do |name|
    @delegate.instance_variable_get(name)
  end
end

#variables ⇒ Object

Same as #instance_variables.



120
121
122
 
# File 'lib/core/facets/instance.rb', line 120

def variables
  @delegate.instance_variables
end