What about boring, old, readable, and shortest yet: float clip(float n, float lower, float upper) { return std::max(lower, std::min(n, upper)); } ? This expression could also be ‘genericized’ like so: template <typename T> T clip(const T& n, const T& lower, const T& upper) { return std::max(lower, std::min(n, upper)); } Update Billy ONeal added: Note that … Read more
The Curry-Howard isomorphism simply states that types correspond to propositions, and values correspond to proofs. Int -> Int doesn’t really mean much interesting as a logical proposition. When interpreting something as a logical proposition, you’re only interested in whether the type is inhabited (has any values) or not. So, Int -> Int just means “given … Read more
My rule of thumb, which covers basically 99% of all use cases for conditional statements, is: Grouping: () Member access . or […] Not: ! Comparison, e.g. < , >= , === , !=, … Logical AND && Logical OR || MDN gives you the exhaustive breakdown: JavaScript Operator Precedence So for your example: (firstRun … Read more
Agreeing with will I would say use something from the workflow engine family although not workflow. Examine System.Workflow.Activities.Rules Namespace a little bit – it’s supported in .Net 3, and built into .Net3.5. You have everything in hand for free to use like you mentioned : RuleCondition for conditions , RuleAction for actions standardized format for … Read more
To state it different: Having a (complex) query with JOINs, SUBSELECTs, UNIONs is it possible (or not) to reduce it to a simpler, equivalent SQL statement, which is producing the same result, by using some transformation rules? This answer was written in 2009. Some of the query optimization tricks described here are obsolete by now, … Read more
The Java Tutorials has a list illustrating operator precedence. The equality operators will be evaluated first, then &&, then ||. Parentheses will be evaluated before anything else, so adding them can change the order. This is usually pretty much the same from language to language, but it’s always a good idea to double check. It’s … Read more
Because in 2’s complement, -n is ~n+1. If n is a power of 2, then it only has one bit set. So ~n has all the bits set except that one. Add 1, and you set the special bit again, ensuring that n & (that thing) is equal to n. The converse is also true … Read more
So I thought about it a bit more and made some progress. Here’s a first stab at encoding Martin-Löf’s delightfully simple (but inconsistent) Set : Set system in a combinatory style. It’s not a good way to finish, but it’s the easiest place to get started. The syntax of this type theory is just lambda-calculus … Read more
You could use is() instead of hasClass(): if ($(‘html’).is(‘.m320, .m768’)) { … }
The comma operator chains multiple expressions together, and the result of the operation is the value of the last operand. The only real use for it is when you need multiple side effects to occur, such as assignment or function calls.