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Programmer Puzzle: Encoding a chess board state throughout a game
..., 2 bishops, 1 queen and 1 king as illustrated here:
Positions are generally recorded as a letter for the column followed by the number for the row so White’s queen is at d1. Moves are most often stored in algebraic notation, which is unambiguous and generally only specifies the minimal informa...
What happens when a computer program runs?
...
It really depends on the system, but modern OSes with virtual memory tend to load their process images and allocate memory something like this:
+---------+
| stack | function-local variables, return addresses, return values, e...
Setting background-image using jQuery CSS property
...rnatively to what the others are correctly suggesting, I find it easier usually to toggle CSS classes, instead of individual CSS settings (especially background image URLs). For example:
// in CSS
.bg1
{
background-image: url(/some/image/url/here.jpg);
}
.bg2
{
background-image: url(/anot...
Beginner's guide to ElasticSearch [closed]
...irst principals in context of Elasticsearch. While the reference docs are all about finding the precise parameter you need, the Guide is a narrative that discusses problems in search and how to solve them.
Best of all, the book is OSS and free (unless you want to buy a paper copy, in which case O'...
MySQL join with where clause
...s the subset of user_category_subscriptions with a user_id of 1 to join to all of the rows in categories. This will give you all of the rows in categories, while only the categories that this particular user has subscribed to will have any information in the user_category_subscriptions columns. Of c...
Kill a postgresql session/connection
How can I kill all my postgresql connections?
20 Answers
20
...
Access POST values in Symfony2 request object
... without a class, and get back an array of the submitted
data. This is actually really easy:
public function contactAction(Request $request) {
$defaultData = array('message' => 'Type your message here');
$form = $this->createFormBuilder($defaultData)
->add('name', 'text')
->add('...
Ternary operation in CoffeeScript
...placement for what is supposed to be a concise expression. And ?: is after all a very ingrained standard among many languages, JavaScript among them. Notwithstanding all that, it seems to be set in stone at this stage.]
– mahemoff
Nov 15 '14 at 3:16
...
Building big, immutable objects without using constructors having long parameter lists
...of course completely wrong.
The trick is that only the build() method actually creates a Foo (hence you Foo can be immutable).
FooFactory.create(), whereXXX(..) and withXXX(..) all create "something else".
That something else may be a FooFactory, here's one way to do it....
You FooFactory would ...
Setting Android Theme background color
...
Okay turned out that I made a really silly mistake. The device I am using for testing is running Android 4.0.4, API level 15.
The styles.xml file that I was editing is in the default values folder. I edited the styles.xml in values-v14 folder and it works ...