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Why is it impossible to build a compiler that can determine if a C++ function will change the value
...er any given program will terminate. This is known as the halting problem, and it's one of those things that's not computable.
To be clear, you can write a compiler that can determine that a function does change the variable in some cases, but you can't write one that reliably tells you that the fu...
How to get .pem file from .key and .crt files?
...ust named with .crt or .key.
If the file's content begins with -----BEGIN and you can read it in a text editor:
The file uses base64, which is readable in ASCII, not binary format. The certificate is already in PEM format. Just change the extension to .pem.
If the file is in binary:
For the serv...
Try-finally block prevents StackOverflowError
...n from the invocation of foo() inside the try, you call foo() from finally and start recursing again. When that causes another exception, you'll call foo() from another inner finally(), and so on almost ad infinitum.
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What is the difference between JavaConverters and JavaConversions in Scala?
...n scala.collection , there are two very similar objects JavaConversions and JavaConverters .
4 Answers
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What does ~~ (“double tilde”) do in Javascript?
I was checking out an online game physics library today and came across the ~~ operator. I know a single ~ is a bitwise NOT, would that make ~~ a NOT of a NOT, which would give back the same value, wouldn't it?
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jQuery: Can I call delay() between addClass() and such?
...t or dequeue is to let jQuery know that you are done with this queued item and that it should move on to the next one.
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JavaScript inheritance: Object.create vs new
...like
function SomeBaseClass(){
this.publicProperty='SomeValue';
}
and if you use it like
var obj=new MyClass();
console.log(obj.publicProperty); // undefined
console.log(obj);
The obj object won't have publicProperty property like in this example.
Your second example
MyClass.prot...
scp or sftp copy multiple files with single command
...te server in different directories.
For example, I want to run these 4 commands at once.
15 Answers
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When to use pip requirements file versus install_requires in setup.py?
I'm using pip with virtualenv to package and install some Python libraries.
4 Answers
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Converting file size in bytes to human-readable string
...nary, so to express 1551859712 as ~1.4GiB would be correct.
On the other hand, hard disk manufacturers like to use decimal, so they would call it ~1.6GB.
And just to be confusing, floppy disks use a mixture of the two systems - their 1MB is actually 1024000 bytes.
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