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How to reverse a singly linked list using only two pointers?
... this the same way you can swap two numbers without using a third. Simply cast the pointers to a int/long and perform the XOR operation a couple of times. This is one of those C tricks that makes for a fun question, but doesn't have any practical value.
Can you reduce the O(n) complexity? No, ...
Get to UIViewController from UIView?
...roller *) firstAvailableUIViewController {
// convenience function for casting and to "mask" the recursive function
return (UIViewController *)[self traverseResponderChainForUIViewController];
}
- (id) traverseResponderChainForUIViewController {
id nextResponder = [self nextResponder];
...
What is the difference between & vs @ and = in angularJS
...cope into the child directive. John Lindquist has a series of short screencasts explaining each of these. Screencast on @ is here: https://egghead.io/lessons/angularjs-isolate-scope-attribute-binding
& allows the directive's isolate scope to pass values into the parent scope for evaluation in...
How to sum up elements of a C++ vector?
...he vector has float. The result can be subtly wrong, and the compiler will cast the result back up to a float without telling you.
– nneonneo
Feb 19 '13 at 3:30
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Using generic std::function objects with member functions in one class
... Just add a little tip: member function pointer can be implicitly cast to std::function, with extra this as it's first parameter, like std::function<void(Foo*, int, int)> = &Foo::doSomethingArgs
– landerlyoung
Nov 25 '19 at 6:44
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Hibernate SessionFactory vs. JPA EntityManagerFactory
...life benefits? JPA is better because it has TypedQuery, stops you from typecasting all over the place.
– Bastian Voigt
Mar 4 '15 at 8:37
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Rotating a two-dimensional array in Python
...
^ note that you have to cast the result of zip to a list in Python 3.x!
– RYS
Feb 11 '18 at 2:18
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PostgreSQL query to return results as a comma separated list
...e taking an int for its first argument so I did something like: string_agg(CAST(id as varchar), ',') instead.
– JZC
Jun 22 '15 at 17:24
17
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Platform independent size_t Format specifiers in c?
... C89/C90. If you're aiming for C89-compliant code, the best you can do is cast to unsigned long and use the l length modifier instead, e.g. printf("the size is %lu\n", (unsigned long)size);; supporting both C89 and systems with size_t larger than long is trickier and would require using a number of...
Rails detect if request was AJAX
...context, you have to treat them not as not booleans, but ones that will be cast to bool. Above env['HTTP_X_REQUESTED_WITH'] =~ /XMLHttpRequest/ returns 0 not false. And 0 is actually truthy, not falsey in ruby: 0 || 1 => 0 But I'm going to alter my post for clarity.
– pixele...