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How to specialize std::hash::operator() for user-defined type in unordered containers?
To support user-defined key types in std::unordered_set<Key> and std::unordered_map<Key, Value>
one has to provide operator==(Key, Key) and a hash functor:
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Case-INsensitive Dictionary with string key-type in C#
...ol in the instance creation, let say your object is desterilized from json etc, you can create a wrapper class that inherits from dictionary class.
public class CaseInSensitiveDictionary<TValue> : Dictionary<string, TValue>
{
public CaseInSensitiveDictionary() : base(StringComparer.O...
Private virtual method in C++
...e a template for other reasons).
I NEED to have the common base class in order to make many of the public APIs work correctly (I'm using variadic templates), but I cannot let that object out into the wild. Worse, if I leave the craters in the state machine- in the form of pure virtual functions- a...
How to get xdebug var_dump to show full object/array
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Prompt for user input in PowerShell
...y? Because it only works in PowerShell.exe, not PowerShell ISE, PowerGUI, etc.
Read-Host is, quite simply, bad form. Read-Host uncontrollably stops the script to prompt the user, which means that you can never have another script that includes the script that uses Read-Host.
You're trying to ask ...
What is Unicode, UTF-8, UTF-16?
...s basic unit, it is affected by endianness. To compensate, a reserved byte order mark can be placed at the beginning of a data stream which indicates endianness. Thus, if you are reading UTF-16 input, and no endianness is specified, you must check for this.
As can be seen, UTF-8 and UTF-16 are now...
In C#, what happens when you call an extension method on a null object?
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{
if(obj == null) throw new ArgumentNullException(parameterName);
}
etc
Fundamentally, calls to static calls are very literal - i.e.
string s = ...
if(s.IsNullOrEmpty()) {...}
becomes:
string s = ...
if(YourExtensionClass.IsNullOrEmpty(s)) {...}
where there is obviously no null check.
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What is the difference between '>' and a space in CSS selectors?
...ments and not any descendant (including grandchildren, grand-grandchildren etc.) as in the second example without the >.
The child selector is not supported by IE 6 and lower. A great compatibility table is here.
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iOS forces rounded corners and glare on inputs
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You can get rid of some more webkits form, input, etc. styling with this:
input, textarea, select {
-webkit-appearance: none;
}
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Unmarshaling nested JSON objects
...even if the simple cases look alike. The content of a XML tag is kinda:(An ordered map of sub-tags OR Text) AND an unordered map of attributes. JSON is much more like a Go struct. So mapping JSON to structs is much simpler: Just model the struct after your JSON.
– Volker
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