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Why don't Java Generics support primitive types?
... @DanyalAytekin - In fact, Java generics are NOT handled like C++ templates at all ...
– Stephen C
Mar 26 '12 at 1:32
22
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Downcasting shared_ptr to shared_ptr?
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@Tim Sylvester: but, C++ is not a "perfect" OO language! :-) down-casts have their place in a non-perfect OO language
– Steve Folly
Aug 31 '09 at 22:17
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Threading in a PyQt application: Use Qt threads or Python threads?
...Python manages the execution between threads), you release it when you run C++ code. There is no difference at all.
– Lukáš Lalinský
Oct 29 '09 at 12:05
1
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How can you find the height of text on an HTML canvas?
... while(!last && r) {
r--;
for(c = 0; c < width; c++) {
if(data[r * width * 4 + c * 4 + 3]) {
last = r;
break;
}
}
}
// Find the first line with a non-white pixel
while(r) {
r--;
fo...
Difference between `const shared_ptr` and `shared_ptr`?
I'm writing an accessor method for a shared pointer in C++ that goes something like this:
4 Answers
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Pass Variables by Reference in Javascript
...ert("x is " + x + ", y is " + y); // "x is 1, y is 2"
In a language like C++, it's possible to do that because that language does (sort-of) have pass-by-reference.
edit — this recently (March 2015) blew up on Reddit again over a blog post similar to mine mentioned below, though in this case abo...
Explain Morris inorder tree traversal without using stacks or recursion
...ld proceed following left children.
Here's my Java code (Sorry, it is not C++)
public static <T> List<T> traverse(Node<T> bstRoot) {
Node<T> current = bstRoot;
List<T> result = new ArrayList<>();
Node<T> prev = null;
while (current != null)...
What are the differences between Rust's `String` and `str`?
...
I have a C++ background and I found it very useful to think about String and &str in C++ terms:
A Rust String is like a std::string; it owns the memory and does the dirty job of managing memory.
A Rust &str is like a char* (...
Is it good practice to NULL a pointer after deleting it?
...
Setting a pointer to 0 (which is "null" in standard C++, the NULL define from C is somewhat different) avoids crashes on double deletes.
Consider the following:
Foo* foo = 0; // Sets the pointer to 0 (C++ NULL)
delete foo; // Won't do anything
Whereas:
Foo* foo = new Foo(...
Error: could not find function … in R
... provide enough arguments).
I got this in an Rcpp context, where I wrote a C++ function with optionnal arguments, and did not provided those arguments in R. It appeared that optionnal arguments from the C++ were seen as mandatory by R. As a result, R could not find a matching function for the correc...