大约有 45,000 项符合查询结果（耗时：0.0795秒） [XML]
Make column not nullable in a Laravel migration
...'m writing a migration to make certain columns in a table nullable right now. For the down function, I of course want to make those columns not nullable again. I looked through the schema builder docs , but couldn't see a way to do this.
...
Difference: std::runtime_error vs std::exception()
...
@rubenvb I did not know about that, but I think it will clearify the code for future maintenance if only objects of classes derived from exception are thrown. Example: I like to find out what custom exceptions are implemented in my code base and...
Should composer.lock be committed to version control?
...ession for your dependency management system as the dependency version has now gone back to being implicitly defined.
Also, your project should never have to be rebuilt or have its dependencies reacquired in each environment, especially prod. Your deliverable (tar, zip, phar, a directory, etc) shou...
Creating stored procedure and SQLite?
...
Article is dead now, but the project is at github.com/wolfch/sqlite-3.7.3.p1. The readme file implies that this is not production ready, nor is it for experimentation. It seems like it's more of a proof of concept.
– pq...
How do I tell Matplotlib to create a second (new) plot, then later plot on the old one?
...ecification of number of subplots (rows, col, index). But it's much easier now to use plt.subplots(nrows, ncols). Have updated the example.
– simonb
Jun 10 '18 at 18:55
...
Is SQL or even TSQL Turing Complete?
...
Strictly speaking, SQL is now a turing complete language because the latest SQL standard includes the "Persistent Stored Modules" (PSMs). In short, a PSM is the standard version of the PL/SQL language in Oracle (and other similar procedural extensions...
Increasing the timeout value in a WCF service
...ing, baseAddress);
serviceHost.Open();
// The service can now be accessed.
Console.WriteLine("The service is ready.");
Console.WriteLine("Press <ENTER> to terminate service.");
Console.WriteLine();
Console.ReadLine();
}
catch (Communica...
How much size “Null” value takes in SQL Server
....
The second link seems to be a question about Microsoft Access. I don't know the details of how Access stores NULLs but I wouldn't be surprised if it is different to SQL Server.
share
|
improve t...
Java GUI frameworks. What to choose? Swing, SWT, AWT, SwingX, JGoodies, JavaFX, Apache Pivot? [close
...t 10 years). You could argue that Swing was good to begin with but we all know that code rots. And that's especially true for UIs today.
That leaves you with SwingX. After a longer period of slow progress, development has picked up again. The major drawback with Swing is that it hangs on to some ol...
Why are arrays covariant but generics are invariant?
...th a List<Animal> - you can add any animal to it... including a cat. Now, can you logically add a cat to a litter of puppies? Absolutely not.
// Illegal code - because otherwise life would be Bad
List<Dog> dogs = new List<Dog>();
List<Animal> animals = dogs; // Awooga awooga...