php is null when empty? [duplicate]
This question already has answers here: How do the PHP equality (== double equals) and identity (=== triple equals) comparison operators differ? (13 … Read more
null
Why does Oracle 9i treat an empty string as NULL?
I know that it does consider ‘ ‘ as NULL, but that doesn’t do much to tell me why this is the case. As … Read more
Best explanation for languages without null
Every so often when programmers are complaining about null errors/exceptions someone asks what we do without null. I have some basic idea of … Read more
What is the `zero` value for time.Time in Go?
In an error condition, I tried to return nil, which throws the error: cannot use nil as type time.Time in return argument What … Read more
TypeScript filter out nulls from an array
TypeScript, –strictNullChecks mode. Suppose I have an array of nullable strings (string | null)[]. What would be a single-expression way to remove all … Read more
Best way to check for “empty or null value”
What is best way to check if value is null or empty string in Postgres sql statements? Value can be long expression so … Read more
What is null in Java?
What is null? Is null an instance of anything? What set does null belong to? How is it represented in the memory? 14 … Read more
Checking if an object is null in C#
I would like to prevent further processing on an object if it is null. In the following code I check if the object … Read more
NULL values inside NOT IN clause
This issue came up when I got different records counts for what I thought were identical queries one using a not in where … Read more
NULL vs nullptr (Why was it replaced?) [duplicate]
This question already has answers here: What exactly is nullptr? (14 answers) Closed 8 years ago. I know that in C++ 0x or … Read more