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What are the use cases for selecting CHAR over VARCHAR in SQL?
...R (or NVARCHAR) when the length varies significantly. CHAR may also be a bit faster because all the rows are of the same length.
It varies by DB implementation, but generally, VARCHAR (or NVARCHAR) uses one or two more bytes of storage (for length or termination) in addition to the actual data. So...
How to truncate a foreign key constrained table?
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You cannot TRUNCATE a table that has FK constraints applied on it (TRUNCATE is not the same as DELETE).
To work around this, use either of these solutions. Both present risks of damaging the data integrity.
Option 1:
Remove constraints
Perform TRUNCATE
Delete manually the rows that n...
Why doesn't Java allow overriding of static methods?
Why is it not possible to override static methods?
22 Answers
22
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What's the difference between a Future and a Promise?
...ise has finally been called CompletableFuture for inclusion in Java 8, and its javadoc explains:
A Future that may be explicitly completed (setting its value and status), and may be used as a CompletionStage, supporting dependent functions and actions that trigger upon its completion.
An exa...
Are there any worse sorting algorithms than Bogosort (a.k.a Monkey Sort)? [closed]
My co-workers took me back in time to my University days with a discussion of sorting algorithms this morning. We reminisced about our favorites like StupidSort , and one of us was sure we had seen a sort algorithm that was O(n!) . That got me started looking around for the "worst" sorting algor...
How do I execute code AFTER a form has loaded?
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To me it seems like the shown handler is executed WHILE the form is loading... am i wrong?
– ckonig
Feb 14 '13 at 15:50
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What is the fastest/most efficient way to find the highest set bit (msb) in an integer in C?
If I have some integer n, and I want to know the position of the most significant bit (that is, if the least significant bit is on the right, I want to know the position of the furthest left bit that is a 1), what is the quickest/most efficient method of finding out?
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Throw keyword in function's signature
What is the technical reason why it is considered bad practice to use the C++ throw keyword in a function signature?
7 An...
JavaScript check if variable exists (is defined/initialized)
Which method of checking if a variable has been initialized is better/correct?
(Assuming the variable could hold anything (string, int, object, function, etc.))
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What are unit tests, integration tests, smoke tests, and regression tests?
What are unit tests, integration tests, smoke tests, and regression tests? What are the differences between them and which tools can I use for each of them?
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