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How to check if a specified key exists in a given S3 bucket using Java
...ing. So you can catch that exception and deal with it in your app.
But in order for this to work, you will need to have ListBucket access for the user on that bucket. Just GetObject access will not work. The reason being, Amazon will prevent you from checking for the presence of the key if you don...
How to re import an updated package while in Python Interpreter? [duplicate]
...low. Where previously they might have needed to restart the application in order to put changed code into effect, those changes can be applied immediately.
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CommandError: You must set settings.ALLOWED_HOSTS if DEBUG is False
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Where should I put the code correctly, in order to not waste the code?
– Малъ Скрылевъ
Jul 30 '15 at 7:42
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How many files can I put in a directory?
... We have hundreds of thousands of images in our social network website. In order to improve the performance we were forced to have 100 (or 1000 for some files) sub directories and distribute the files into them (ext3 on linux+ Apache for us).
– wmac
Jul 24 '14 ...
Nullable type issue with ?: Conditional Operator
..., by using default, you do not need to specify the variable as nullable in order to assign it a null value. The compiler will auto-assign the specific variable-type's default value and no error will be encountered. Example:
DateTime foo;
foo = true ? default(DateTime) : new DateTime(0);
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Practical uses of git reset --soft?
... that you can choose only one strategy. But I wanted to combine the two in order to get a clean history in which the whole repository is atomically updated to a new version.
I have a superproject, let's call it projectA, and a subproject, projectB, that I merged into a subdirectory of projectA....
Java Equivalent of C# async/await?
...ransform your async/await code into a state machine.
At the same time, in order for async/await to be really practicable in real projects, we need to have lots of Async I/O library functions already in place. For C#, most original synchronized I/O functions has an alternative Async version. The rea...
Determine if an HTML element's content overflows
...lly, you can compare the client[Height|Width] with scroll[Height|Width] in order to detect this... but the values will be the same when overflow is visible. So, a detection routine must account for this:
// Determines if the passed element is overflowing its bounds,
// either vertically or horizont...
postgresql COUNT(DISTINCT …) very slow
...x values in single transaction then you'd need to do this in some explicit order to avoid possible deadlock.
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How to keep the console window open in Visual C++?
... version 2012 - I haven't yet tested 2013). This bug is detailed here.
In order to have the console pause after program termination on a makefile project, perform these steps (this may differ for versions other than 2010 - 2012):
1) Pass /SUBSYSTEM:CONSOLE to the linker. - EDIT: see below.
2) Ope...