Is it ok to use null?

Allow null only if it makes sense for an object reference to have 'no value associated with it'. Don't use null to signal error conditions. The concept of null exists only for reference types. It doesn't exist for value types.

224.1K

820.8K views
2024-01-04 01:13:18

Show all Q/A Info

What is the history of null character?
A null also is used in the C programming language to mark the end of a string of characters. The null character originally was one of a series of special control characters used to communicate with peripheral hardware such as printers or tape drives. The original meaning of null was to instruct a device to do nothing.
2024-02-17 13:51:35

What country is null null in?
Null Island is the point on Earth's surface at zero degrees latitude and zero degrees longitude ( 0°N 0°E), i.e., where the prime meridian and the equator intersect. Null Island is located in international waters in the Atlantic Ocean, roughly 600 km off the coast of West Africa, in the Gulf of Guinea.
2024-02-03 12:01:50

Can unique keys hold null?
In the case of a primary key, we cannot save NULL values. In the case of a unique key, we can save a null value, however, only one NULL value is supported.
2024-01-10 11:23:55

Can i breed type null?
It is impossible to breed Type: Null with any pokemon (including Ditto). This is a unique species that does not fit into the gender binary of the Pokemon games and is also in an undiscovered egg group.
2024-01-08 00:36:02

Recommended Next Q/A: