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What is a handle in C++?
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A handle can be anything from an integer index to a pointer to a resource in kernel space. The idea is that they provide an abstraction of a resource, so you don't need to know much about the resource itself to use it.
For instance, the HWND in the ...
Getting the first and last day of a month, using a given DateTime object
...t day and last day of the month where a given date lies in. The date comes from a value in a UI field.
15 Answers
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var functionName = function() {} vs function functionName() {}
...s is a function expression:
var xyz = function(){};
xyz here is defined from the point of assignment:
// We can't call it here
xyz(); // UNDEFINED!!!
// Now it is defined
xyz = function(){}
// We can call it here
xyz(); // works
Function declaration vs. function expression is the real reason...
What is the purpose of using -pedantic in GCC/G++ compiler?
... @huahsin68: well, more or less. MSVC is a rather different compiler from most others, more adapted to its particular ecosystem and not available outside it. It does a lot of things its own way - which is not the same as the standard. Nevertheless, if you stay with the standard headers and s...
deleting rows in numpy array
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The simplest way to delete rows and columns from arrays is the numpy.delete method.
Suppose I have the following array x:
x = array([[1,2,3],
[4,5,6],
[7,8,9]])
To delete the first row, do this:
x = numpy.delete(x, (0), axis=0)
To delete the thir...
push_back vs emplace_back
...o, so I asked the same question on the Visual C++ blog. Here is the answer from Stephan T Lavavej, the official maintainer of the Visual C++ standard library implementation at Microsoft.
Q: Are beta 2 emplace functions just some kind of placeholder right now?
A: As you may know, variadic te...
Java Pass Method as Parameter
...'s the visitor pattern (separate the action of iterating over a collection from the function applied to each member of the collection), not the command pattern (encapsulate the arguments for a method call into an object). You are specifically not encapsulating the argument - it is provided by the it...
Sort array of objects by single key with date value
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If you want to sort based on numeric values from your keys then this ES6 one-liner might be of help. yourArr.sort((a, b) => a.yourNumericOrderingKey > b.yourNumericOrderingKey). In my case I had to sort based on an order key that was coming inside the objects of ...
How do I compare strings in Java?
...tion where you know you're dealing with interned strings, you can use ==.
From JLS 3.10.5. String Literals:
Moreover, a string literal always refers to the same instance of class String. This is because string literals - or, more generally, strings that are the values of constant expressions (...
How do I include a newline character in a string in Delphi?
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{$IFDEF MSWINDOWS} AnsiString(#13#10) {$ENDIF};
This is from Delphi 2009 (notice the use of AnsiChar and AnsiString). (Line wrap added by me.)
So if you want to make your TLabel wrap, make sure AutoSize is set to true, and then use the following code:
label1.Caption := 'Line on...