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Which @NotNull Java annotation should I use?
...ation.constraints
org.checkerframework.checker.nullness.qual
all have runtime annotations (@Retention(RUNTIME)), while
android.support.annotation
edu.umd.cs.findbugs.annotations
org.eclipse.jdt.annotation
org.jetbrains.annotations
are only compile time (@Retention(CLASS)).
As described in thi...
CSS to make HTML page footer stay at bottom of the page with a minimum height, but not overlap the p
... This only works if you know the height of your footer ahead of time. Sometimes footers have dynamic content, or your building a framework. Any ideas for variable height footers?
– Costa
Jun 23 '14 at 16:31
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How can I convert byte size into a human-readable format in Java?
...: The original snippet posted here was the most copied Java snippet of all time on Stack Overflow, and it was flawed. It was fixed, but it got messy.
Full story in this article: The most copied Stack Overflow snippet of all time is flawed!
Source: Formatting byte size to human readable format | Pro...
Passing a std::array of unknown size to a function
...ely, use vector instead of array, which allows you to store the size at runtime rather than as part of its type:
void mulArray(std::vector<int>& arr, const int multiplier) {
for(auto& e : arr) {
e *= multiplier;
}
}
...
Which cryptographic hash function should I choose?
... one wins the intergalactic lottery, ever.
But ... MD5 is broken
Sometimes the fact that its broken does not matter.
As it stands there are no known pre-image or second pre-image attacks on MD5.
So what is so broken about MD5, you may ask? It is possible for a third party to generate 2 mess...
Is there a method to generate a UUID with go language
...d via other algorithms (e.g. version 1 UUIDs based on your MAC address and time).
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Difference between Covariance & Contra-variance
...ject> to Action<string>; values only go into these objects.
This time it works because if the API is expecting something general (like object) you can give it something more specific (like string).
More generally
If you have an interface IFoo<T> it can be covariant in T (i.e. decla...
How to check if a file is a valid image file?
...
A lot of times the first couple chars will be a magic number for various file formats. You could check for this in addition to your exception checking above.
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Has Facebook sharer.php changed to no longer accept detailed parameters?
...it's not just a URL format issue. But they're certainly taking their sweet time doing anything about it.
– tdous
Feb 28 '14 at 15:14
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Colorized Ruby output to the terminal [closed]
Using Ruby, how can I perform background and foreground text colorization for output in the terminal?
11 Answers
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