null Archives - Page 2 of 6

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 ...

May 26, 2022
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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 ...

May 26, 2022
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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 ...

May 25, 2022
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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 ...

May 24, 2022
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TypeScript filter out nulls from an array

TypeScript, --strictNullChecks mode. Suppose I have an array of nullable strings (string | null)...

May 24, 2022
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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 ...

May 23, 2022
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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 ...

May 20, 2022
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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 ...

May 19, 2022
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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 ...

May 18, 2022
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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 ...

May 18, 2022
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