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How to determine whether a given Linux is 32 bit or 64 bit?
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735
Try uname -m. Which is short of uname --machine and it outputs:
x86_64 ==> 64-bit kernel
i...
How to encrypt/decrypt data in php?
...er generator. The following example would be recommended (>= 5.3):
$key_size = 32; // 256 bits
$encryption_key = openssl_random_pseudo_bytes($key_size, $strong);
// $strong will be true if the key is crypto safe
This can be done once or multiple times (if you wish to create a chain of encrypti...
Why doesn't C# support the return of references?
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This question was the subject of my blog on June 23rd 2011. Thanks for the great question!
The C# team is considering this for C# 7. See https://github.com/dotnet/roslyn/issues/5233 for details.
UPDATE: The feature made it in to C# 7!
You are correct; .NET does support ...
static files with express.js
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answered May 3 '12 at 22:25
abeabe
1,38911 gold badge1010 silver badges99 bronze badges
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Gradle does not find tools.jar
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143
I had this problem when I was trying to run commands through CLI.
It was a problem with system...
Which .NET Dependency Injection frameworks are worth looking into? [closed]
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345
edit (not by the author): There is a comprehensive list of IoC frameworks available at https:/...
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Always pass weak reference of self into block in ARC?
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answered Nov 17 '13 at 14:55
jemmonsjemmons
18.1k55 gold badges5252 silver badges8383 bronze badges
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When does invoking a member function on a null instance result in undefined behavior?
...stand is why it's undefined behavior to dereference a null pointer. In C++03, there's actually a bit of ambiguity here.
Although "dereferencing a null pointer results in undefined behavior" is mentioned in notes in both §1.9/4 and §8.3.2/4, it's never explicitly stated. (Notes are non-normative.)...
What is the difference between typeof and instanceof and when should one be used vs. the other?
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answered Jul 8 '11 at 14:30
Szymon WygnańskiSzymon Wygnański
8,91666 gold badges2727 silver badges4444 bronze badges
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