Redis hashes operations

Redis hash is similar to HashMap in Java. Redis provides number of commands to provide operations on hashes.

       Sets field in the key to given value

      Sets the number of fields to specific value at a time.

       Gets the value of the field stored at key.

       Returns the values associated with the fields for given hash key

       Check for existence of the field

       Returns all the fields and values stored at this key

       Removes specified fields from the hash key

       Returns the number of fields stored at key

       Returns all values stored at key

       Increment the value of the field with “increment” value

       Increment the value of the field with “increment” value

       Sets the value to the field, if field doesn't exist

       Returns the string length of the value associated with this key

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