Class: InsertOrderPreservingHash

Inherits:
Hash
  • Object
show all
Includes:
Enumerable
Defined in:
lib/json/ld/extensions.rb

Instance Method Summary collapse

Constructor Details

#initialize(*args, &block) ⇒ InsertOrderPreservingHash

Returns a new instance of InsertOrderPreservingHash.



46
47
48
49
 
# File 'lib/json/ld/extensions.rb', line 46

def initialize(*args, &block)
  super
  @ordered_keys = []
end

Instance Method Details

#[]=(key, val) ⇒ Object 



51
52
53
54
 
# File 'lib/json/ld/extensions.rb', line 51

def []=(key, val)
  @ordered_keys << key unless has_key? key
  super
end

#clear ⇒ Object 



77
78
79
80
 
# File 'lib/json/ld/extensions.rb', line 77

def clear
  @ordered_keys.clear
  super
end

#delete(k, &block) ⇒ Object 



82
83
84
85
 
# File 'lib/json/ld/extensions.rb', line 82

def delete(k, &block)
  @ordered_keys.delete(k)
  super
end

#delete_if(&block) ⇒ Object 



94
95
96
97
 
# File 'lib/json/ld/extensions.rb', line 94

def delete_if(&block)
  reject!(&block)
  self
end

#each ⇒ Object Also known as: each_pair 



56
57
58
 
# File 'lib/json/ld/extensions.rb', line 56

def each
  @ordered_keys.each {|k| yield(k, super[k])}
end

#each_key ⇒ Object 



65
66
67
 
# File 'lib/json/ld/extensions.rb', line 65

def each_key
  @ordered_keys.each {|k| yield k}
end

#each_value ⇒ Object 



61
62
63
 
# File 'lib/json/ld/extensions.rb', line 61

def each_value
  @ordered_keys.each {|k| yield(super[k])}
end

#keys ⇒ Object 



69
70
71
 
# File 'lib/json/ld/extensions.rb', line 69

def keys
  @ordered_keys
end

#merge(other) ⇒ Object 



105
106
107
 
# File 'lib/json/ld/extensions.rb', line 105

def merge(other)
  self.dup.merge!(other)
end

#merge!(other) ⇒ Object 



99
100
101
102
103
 
# File 'lib/json/ld/extensions.rb', line 99

def merge!(other)
  @ordered_keys += other.instance_variable_get(:@ordered_keys) || other.keys
  super
  self
end

#reject! ⇒ Object 



87
88
89
90
91
92
 
# File 'lib/json/ld/extensions.rb', line 87

def reject!
  del = []
  each_pair {|k,v| del << k if yield k,v}
  del.each {|k| delete k}
  del.empty? ? nil : self
end

#values ⇒ Object 



73
74
75
 
# File 'lib/json/ld/extensions.rb', line 73

def values
  @ordered_keys.map {|k| super[k]}
end