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Count(*) vs Count(1) - SQL Server
...leeding obvious what you mean. COUNT(1) has been optimized out by RDBMS vendors because of this superstition. Otherwise it would be evaluated as per ANSI
b) Otherwise, let TX be the single-column table that is the
result of applying the <value expression> to each row of T
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Convert a Git folder to a submodule retrospectively?
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Does git clone <your_project> <your_submodule> only download files for your_submodule?
– Dominic
Mar 23 '17 at 12:05
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Are there any downsides to passing structs by value in C, rather than passing a pointer?
Are there any downsides to passing structs by value in C, rather than passing a pointer?
10 Answers
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Returning 'IList' vs 'ICollection' vs 'Collection'
...eturned data that the consumer needs to use. That way you have greater freedom to change the implementation of the API, without breaking the code that is using it.
Consider also the IEnumerable<T> interface as return type. If the result is only going to be iterated, the consumer doesn't need ...
How to show the last queries executed on MySQL?
...rfect destination. /var/log /var/data/log /opt /home/mysql_savior/var
You don't have to restart the server and interrupt any current connections to it.
restarting the server leaves you where you started (log is by default still off)
For more information, see
MySQL 5.1 Reference Manual - Server Sy...
How to print the full NumPy array, without truncation?
...want to print a numpy array only once, unfortunately this solution has the downside of requiring you to reset this configuration change after doing the print.
– Trevor Boyd Smith
Jun 5 '19 at 13:56
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How to resize the AVD emulator (in Eclipse)?
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From within Eclipse:
Go to Window > Android SDK and AVD Manager > Virtual Devices
Select the AVD you want to launch and click Start
Check the Scale display to real size button
Enter how big you want it to appear in inches and press Launch. For this...
Android: Coloring part of a string using TextView.setText()?
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I really do't like the solution android offers here, as it does not work with multi language as I have no idea how many chars in my words are. I'm currently looking for a solution where I can have multiple spans that I can attach all ...
How would I run an async Task method synchronously?
... a situation where I need to call an async method synchronously. How can I do that?
24 Answers
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Setting the selected value on a Django forms.ChoiceField
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This doesn't touch on the immediate question at hand, but this Q/A comes up for searches related to trying to assign the selected value to a ChoiceField.
If you have already called super().__init__ in your Form class, you should ...