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Module: Redis::Commands::HyperLogLog

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Included In:
::Redis, ::Redis::Commands, ::Redis::MultiConnection, ::Redis::PipelinedConnection
Defined in: lib/redis/commands/hyper_log_log.rb

Instance Method Summary

Instance Method Details

#pfadd(key, member) ⇒ Boolean

Add one or more members to a HyperLogLog structure.

Parameters:

  • key (String)
  • member (String, Array<String>) —

    one member, or array of members

Returns:

  • (Boolean) —

    true if at least 1 HyperLogLog internal register was altered. false otherwise.

[ GitHub ] 

  


# File 'lib/redis/commands/hyper_log_log.rb', line 11



def pfadd(key, member)
  send_command([:pfadd, key, member], &Boolify)
end


  








  

    #pfcount(*keys)  ⇒ Integer 
  



  

    
Get the approximate cardinality of members added to HyperLogLog structure.



If called with multiple keys, returns the approximate cardinality of the
union of the HyperLogLogs contained in the keys.


  





  
Parameters:


    
  
  • 
    keys
    (String, Array<String>)
  
    • 





  [ GitHub ]


  

  


# File 'lib/redis/commands/hyper_log_log.rb', line 22



def pfcount(*keys)
  send_command([:pfcount] + keys.flatten(1))
end


  








  

    #pfmerge(dest_key, *source_key)  ⇒ Boolean 
  



  

    
Merge multiple HyperLogLog values into an unique value that will approximate the cardinality of the union of
the observed Sets of the source HyperLogLog structures.


  





  
Parameters:


    
  
  • 
    dest_key
    (String)
—    
    destination key
    

    
  
    • 
  
  • 
    source_key
    (String, Array<String>)
—    
    source key, or array of keys
    

    
  
    • 





  [ GitHub ]


  

  


# File 'lib/redis/commands/hyper_log_log.rb', line 32



def pfmerge(dest_key, *source_key)
  send_command([:pfmerge, dest_key, *source_key], &BoolifySet)
end