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How do you set, clear, and toggle a single bit?
...Setting a bit
Use the bitwise OR operator (|) to set a bit.
number |= 1UL << n;
That will set the nth bit of number. n should be zero, if you want to set the 1st bit and so on upto n-1, if you want to set the nth bit.
Use 1ULL if number is wider than unsigned long; promotion of 1UL << n...
Modern way to filter STL container?
...after years of C# I was wondering what the modern - read: C++11 - way of filtering an array would be, i.e. how can we achieve something similar to this Linq query:
...
The Web Application Project […] is configured to use IIS. The Web server […] could not be found.
...it {ProjectName}.csproj"
In the project file, change the following line:
<UseIIS>True</UseIIS>
to
<UseIIS>False</UseIIS>
Save the file.
Now reload your project.
Done.
You'll then be able to open your project. If at this point, you want to use IIS, simply go to your project...
get dictionary value by key
...
Why not just use key name on dictionary, C# has this:
Dictionary<string, string> dict = new Dictionary<string, string>();
dict.Add("UserID", "test");
string userIDFromDictionaryByKey = dict["UserID"];
If you look at the tip suggestion:
...
Java: Instanceof and Generics
...d catch it by making a factory for your object like this:
public static <T> MyObject<T> createMyObject(Class<T> type) {
return new MyObject<T>(type);
}
And then in the object's constructor store that type, so variable so that your method could look like this:
...
How does this giant regex work?
...\x61\x6C is equivalent to just typing eval, but someone who sees eval in a script is going to realize immediately that something is up. The complete replacement string translates to:
eval(gzinflate(base64_decode("...")));
I left out the ... contents, but that's the complete code the malware autho...
Is it possible to select the last n items with nth-child?
...t the last two iems of a list:
li:nth-last-child(-n+2) {color:red;}
<ul>
<li>fred</li>
<li>fred</li>
<li>fred</li>
<li>fred</li>
<li>fred</li>
<li>fred</li>
<li>fred</li>
<li>...
XPath to select multiple tags
...cases for each of them. Using | can solve the original problem, but it results in a longer and more complex and challenging to understand XPath expression. The simpler expression in this answer, which uses the or operator produces the wanted node-set and can be specified in the "select" attribute of...
C++ Convert string (or char*) to wstring (or wchar_t*)
...e standard library (C++11 and newer) alone.
The TL;DR version:
#include <locale>
#include <codecvt>
#include <string>
std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
std::string narrow = converter.to_bytes(wide_utf16_source_string);
std::wstring wid...
Use jQuery to change an HTML tag?
...I believe. You'd have to do something like this:
$(this).replaceWith($('<h5>' + this.innerHTML + '</h5>'));
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