Class: UtilityPack::PersistentHash

Inherits:
Object
  • Object
show all
Defined in:
lib/databasedotcom_additions/persistent_hash.rb

Instance Method Summary collapse

Constructor Details

#initialize(path) ⇒ PersistentHash

Returns a new instance of PersistentHash.



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# File 'lib/databasedotcom_additions/persistent_hash.rb', line 7

def initialize path
  @path = path
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/databasedotcom_additions/persistent_hash.rb', line 23

def [](key)
  load[key]
end

#[]=(key, value) ⇒ Object 



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# File 'lib/databasedotcom_additions/persistent_hash.rb', line 27

def []=(key, value)
  h = load
  h[key] = value
  save(h)
end

#json_parse_file(path) ⇒ Object 



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# File 'lib/databasedotcom_additions/persistent_hash.rb', line 11

def json_parse_file(path)
  JSON.parse(File.open(path).read)
end

#load ⇒ Object 



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# File 'lib/databasedotcom_additions/persistent_hash.rb', line 15

def load
  File.exists?(@path) ? json_parse_file(@path) : {}
end

#save(h) ⇒ Object 



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# File 'lib/databasedotcom_additions/persistent_hash.rb', line 19

def save h
  File.open(@path, 'w') {|f| f.write(h.to_json)}
end