Set the specified hash field to the specified value.
<p>
If key does not exist, a new key holding a hash is created.
<p>
<b>Time complexity:</b> O(1)
@param key
@param field
@param value
@return If the field already exists, and the HSET just produced an update of the value, 0 is
returned, otherwise if a new field is created 1 is returned.
Set the specified hash field to the specified value. <p> If key does not exist, a new key holding a hash is created. <p> <b>Time complexity:</b> O(1) @param key @param field @param value @return If the field already exists, and the HSET just produced an update of the value, 0 is returned, otherwise if a new field is created 1 is returned.