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How do I print the type of a variable in Rust?
...ile time, you can cause an error and get the compiler to pick it up.
For example, set the variable to a type which doesn't work:
let mut my_number: () = 32.90;
// let () = x; would work too
error[E0308]: mismatched types
--> src/main.rs:2:29
|
2 | let mut my_number: () = 32.90;
| ...
Real World Example of the Strategy Pattern
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Is your example not more a Factory Pattern? Also I think it will not work in C# for example. Your "getCipher()" method is a static method but in C# you cannot define a static method on an interface (neither in Java I think but for th...
not None test in Python [duplicate]
...emeantics created for this purpose (it's not a logical consequence of how expressions are constructed; "1 is (not None)" and "1 is not None" have two different outcomes.
– Ivo van der Wijk
Mar 26 '12 at 11:03
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How do I revert my changes to a git submodule?
...ote that you may also want to git submodule foreach --recursive git clean -x -f -d
– yoyo
Dec 8 '16 at 18:00
1
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App can't be opened because it is from an unidentified developer
I installed Mac OS X Mavericks (10.9) yesterday and since then I am not able to start my Eclipse. I am attaching a screenshot of the message I see.
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Cannot use ref or out parameter in lambda expressions
Why can't you use a ref or out parameter in a lambda expression?
5 Answers
5
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Difference between a Seq and a List in Scala
I've seen in many examples that sometimes a Seq is being used, while other times is the List...
5 Answers
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UnicodeDecodeError, invalid continuation byte
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In binary, 0xE9 looks like 1110 1001. If you read about UTF-8 on Wikipedia, you’ll see that such a byte must be followed by two of the form 10xx xxxx. So, for example:
>>> b'\xe9\x80\x80'.decode('utf-8')
u'\u9000'
But that...
Printing the correct number of decimal points with cout
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With <iomanip>, you can use std::fixed and std::setprecision
Here is an example
#include <iostream>
#include <iomanip>
int main()
{
double d = 122.345;
std::cout << std::fixed;
std::cout << std::setprecision(2);
std:...
static files with express.js
I want to serve index.html and /media subdirectory as static files. The index file should be served both at /index.html and / URLs.
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