Class: OrderedHash
- Inherits:
-
Hash
- Object
- Hash
- OrderedHash
- Defined in:
- lib/mongo/util/ordered_hash.rb
Overview
A hash in which the order of keys are preserved.
Under Ruby 1.9 and greater, this class has no added methods because Ruby’s Hash already keeps its keys ordered by order of insertion.
Instance Attribute Summary collapse
-
#ordered_keys ⇒ Object
Returns the value of attribute ordered_keys.
Instance Method Summary collapse
- #==(other) ⇒ Object
- #[]=(key, value) ⇒ Object
- #clear ⇒ Object
- #delete(key, &block) ⇒ Object
- #delete_if(&block) ⇒ Object
- #each ⇒ Object
- #inspect ⇒ Object
- #keys ⇒ Object
- #merge(other) ⇒ Object
- #merge!(other) ⇒ Object
- #values ⇒ Object
Instance Attribute Details
#ordered_keys ⇒ Object
Returns the value of attribute ordered_keys.
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# File 'lib/mongo/util/ordered_hash.rb', line 36 def ordered_keys @ordered_keys end |
Instance Method Details
#==(other) ⇒ Object
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# File 'lib/mongo/util/ordered_hash.rb', line 23 def ==(other) begin !other.nil? && keys == other.keys && values == other.values rescue false end end |
#[]=(key, value) ⇒ Object
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# File 'lib/mongo/util/ordered_hash.rb', line 42 def []=(key, value) @ordered_keys ||= [] @ordered_keys << key unless @ordered_keys.include?(key) super(key, value) end |
#clear ⇒ Object
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# File 'lib/mongo/util/ordered_hash.rb', line 89 def clear super @ordered_keys = [] end |
#delete(key, &block) ⇒ Object
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# File 'lib/mongo/util/ordered_hash.rb', line 76 def delete(key, &block) @ordered_keys.delete(key) if @ordered_keys super end |
#delete_if(&block) ⇒ Object
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# File 'lib/mongo/util/ordered_hash.rb', line 81 def delete_if(&block) self.each { |k,v| if yield k, v delete(k) end } end |
#each ⇒ Object
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# File 'lib/mongo/util/ordered_hash.rb', line 48 def each @ordered_keys ||= [] @ordered_keys.each { |k| yield k, self[k] } end |
#inspect ⇒ Object
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# File 'lib/mongo/util/ordered_hash.rb', line 70 def inspect str = '{' str << (@ordered_keys || []).collect { |k| "\"#{k}\"=>#{self.[](k).inspect}" }.join(", ") str << '}' end |
#keys ⇒ Object
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# File 'lib/mongo/util/ordered_hash.rb', line 38 def keys @ordered_keys || [] end |
#merge(other) ⇒ Object
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# File 'lib/mongo/util/ordered_hash.rb', line 57 def merge(other) oh = self.dup oh.merge!(other) oh end |
#merge!(other) ⇒ Object
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# File 'lib/mongo/util/ordered_hash.rb', line 63 def merge!(other) @ordered_keys ||= [] @ordered_keys += other.keys # unordered if not an OrderedHash @ordered_keys.uniq! super(other) end |
#values ⇒ Object
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# File 'lib/mongo/util/ordered_hash.rb', line 53 def values collect { |k, v| v } end |