Let's start with a fairly innocuous definition of a polygon: A polygon is a set of points $P$ in Euclidean space and set of edges each having two distinct endpoints in $P$, such that the edges form a single cycle. We will define a regular polygon then as: Take each edge of the polygon and divi...

I use this code. I have nginx reverse-proxying requests to two separate HTTP servers. One handles requests for unauthenticated users, and the second handles requests for authenticated users. The problem in this particular case, is the first server is the one that determines if the user is authent...

Suppose we want to encode a large integer \$x\$ as a list of words from a dictionary of \$n\$ words, in such a way that the decoder can recover \$x\$ regardless of the order in which the words are received. Using lists of length \$k\$, there are \$\binom{n+k-1}k\$ different multisets represented ...

List of images that are not backed up and need replacing more urgently Copies this from the post to community wiki it. You can cross out a post if you have finished replacing it. Frequency URL Failure Post ID (if known) 1 https://i.imgur.com/0ujlnme.jpg APIException: Image uploads are lim...

Currently, we have two open questions tagged tips language-design: Tips for storage in a golfing language Tips for Creating/Maintaining a Golfing Language Now that there is a StackExchange site for Programming Language Design and Implementation (in private beta as of this writing), do we still ...

Commonly used flags are free, unique flags/flag combinations are not Essentially, the flag problem comes down to differentiating two scenarios. At one extreme, we have languages which are often invoked using certain flags. At the opposite extreme, we have flags or flag combinations which have nev...