Just because functions are first class objects, there are closures, and higher order functions, does Javascript deserve to be called a Functional Programming language? The main thing I think it lacks is Pure Functions, and it doesn't 'feel' like other functional languages, like lisp (although thats...

I've been searching and reading up on SignalR recently and, while I see a lot of explanation of what the difference is between Hubs and Persistent Connections I haven't been able to get my head around the next level, which is why would I choose one approach over the other? ...

...er of changing what points to what. Shuffling an array is more complicated and/or takes more memory. As long as your iterations all happen in a "foreach" context, you don't lose any performance in iteration. share ...

... This solution is Rails 2 only. I just investigated this and I think I have a solution. There are two ActiveRecord private methods that you can use: update_without_callbacks create_without_callbacks You're going to have to use send to call these methods. examples: p = Person.ne...

... This feature has difficult semantics (e.g. how attributes are merged) and leads to more problems compared to what it solves. Also, with WebComponents it is normal to have custom elements in the DOM. It sounds to me like its a combination of complexity vs benefit to maintain support. And ap...

... Select * from Table1 left join Table2 ... and Select * from Table2 right join Table1 ... are indeed completely interchangeable. Try however Table2 left join Table1 (or its identical pair, Table1 right join Table2) to see a difference. This query should give you mo...

I created a button and added an action for it, but as soon as it invoked, I got this error: 38 Answers ...

...same with Double.NaN. From JLS §15.21.1. Numerical Equality Operators == and !=: Floating-point equality testing is performed in accordance with the rules of the IEEE 754 standard: If either operand is NaN, then the result of == is false but the result of != is true. Indeed, the test x!=x is tru...

...tant, you can set core.filemode to false, commit your actual code changes, and then set core.filemode to true and git will preserve the file changes. – Michael T. Smith Sep 26 '09 at 18:48 ...

... do dangerous stuff fi I incorporated levislevis85's suggestion (thanks!) and added the -n option to read to accept one character without the need to press Enter. You can use one or both of these. Also, the negated form might look like this: read -p "Are you sure? " -n 1 -r echo # (optional) mov...