... GHC creates a single instance of these constructors and shares it amongst all uses. A word is 4 bytes on a 32-bit machine, and 8 bytes on a 64-bit machine. So e.g. data Uno = Uno a data Due = Due a b an Uno takes 2 words, and a Due takes 3. The Int type is defined as data Int = I# Int# no...

...backtrace (that includes stuff like rails and rspec and other gems) almost all of the time - the only time you ever need it is to debug or understand something caused by the gem itself. So stick to the default backtrace clean patterns, and use -b in the odd case when you need it. ...

...ache will provide info for pages that have a mixture of known and new data allowing you to generate pages faster. An example that could apply to stackoverflow.com: adding this comment invalidated the page cache, so this page would have to be cleared from Varnish (and also my profile page, which pr...

...type inference? No. When you have new Foo(bar) then we could identify all types called Foo in scope regardless of generic arity, and then do overload resolution on each using a modified method type inference algorithm. We'd then have to create a 'betterness' algorithm that determines which of t...

... The W3C says quotes are optional, all three of your ways are legal. Opening and closing quote just need to be the same character. If you have special characters in your URL, you should use quotes or escape the characters (see below). Syntax and basic data...

... Automatically generated docs seem like a very bad idea to me. They don't add any useful information but only blow up the code unnecessarily. If a tool can understand what a method does from its name, than a person can also understand ...

...tead of the MarkerOptions object that you used to create it). This object allows you to change the marker state later on. When you are finished with the marker, you can call Marker.remove() to remove it from the map. As an aside, if you only want to hide it temporarily, you can toggle the visibil...

...se changed constraints are visible in the iPad Simulator running iOS 7.0. All size class optimizations are made available to iOS 7, except size classes that have a Compact Height. This has been confirmed by Apple and is now stated directly in the documentation: For apps supporting versions of iOS ...

...t the default behaviour - here, following the link to jquery.com - by calling event.preventDefault() in the event handler If you want to preventDefault() only if a certain condition is fulfilled (something is hidden for instance), you could test the visibility of your ul with the class expande...

Gradle creates a folder called .gradle . Should I track it with my version control (i.e. git)? 5 Answers ...