Set the specified hash field to the specified value if the field not exists. <b>Time complexity:</b> O(1) @param key @param field @param value @return If the field already exists, 0 is returned, otherwise if a new field is created 1 is returned.
See Implementation
Set the specified hash field to the specified value if the field not exists. <b>Time complexity:</b> O(1) @param key @param field @param value @return If the field already exists, 0 is returned, otherwise if a new field is created 1 is returned.