I wrote a Haskell program to solve the N-queens problem by bruteforce. It works and I find it reasonably readable
But it is pretty slow:
5 seconds for one solution of 8 queens.
1 minute for one solution for 9 queens.
I would like to hear both improvements on readability and performance:
im...
This is one of my Haskell solutions to a variation of the N-Queens problem, where the queens can move like knights in addition to their normal moves. It has been optimized somewhat to avoid investigating redundant combinations.
place :: Int -> [[Int]]
place 0 = [[]]
place n = go $ take n $ repe...
Currently, I have a big for..loop with many if..else inside the loop. I just wonder is there any design pattern or other approach to reduce the long code inside the for..loop. Thank in advance.
foreach ($workingTimes as $hour => $minutes) {
foreach ($minutes as $shift) {
$isBookable ...
I'm new to Haskell and am puzzling over how to best express some operations in the most idiomatic and clear way. Currently (there will be more to come) I'm puzzling over <*> (I'm not even sure what to call that).
For example, if I have, say
f = (^2)
g = (+10)
as representative functions (in p...
I have the following PHP function:
function insertTest(){
global $db;
$field_names = array("id", "first_name", "last_name", "email");
$alias = array(":id", ":fn", ":ln", ":em");
$assignment = array(":id" => "2k39dk38dk2k39dk38dk2k39dk38dk2k39dk38dk",
...
I have this code that I am use to delete all records from an entity. The question is can it be done better or is already the best?
func deleteIncidents() {
let appDel: AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
let context: NSManagedObjectContext = appD...
What distinguishes Code Review from Stack Overflow?
Different communities have different rules to address different needs. A quick summary:
$$
\begin{array}{l|l}
\textrm{Code Review} & \textrm{Stack Overflow} \\
\hline
\textrm{Open-ended questions} & \textrm{Questions with a specific goal} \\
...
I have created a directive for common form fields shared across all the forms in a large AngularJS app I am re-factoring.
The app has lots of forms for various data models (user, owners, victims, suppliers, etc). A lot of the forms for these data models contain an address section which is the s...
I've been trying to figure out if theres a way to pass a string to a factory or constructor and create the correct object without having to map the string to an object, or without having a bunch of if/else statements or switch statements.
Keep in mind, this is a simple example so I can apply wha...
I was reviewing some WPF cone I've written in C# last year.
The scenario is the following:
I've got a usercontrol that show usermessages and it's docked in the bottom of the application's workspace
I've got a ConcurrentQueue that receives message via a IMessageMediator (from Catel, but's irril...
My understanding is that gitlab allows to comment on code only in the context of:
merge requests
when looking at commits
In both case we can only comment on diffs between two commits.
Things are developed here.
This makes total sense in the context of continuous integration. Yet, on some occ...
