Usually each cell in brainfuck has 256 states, which is not enough to tell whether input is EOF or a character (usually \xFF). To fix it we can add one more state to it, and EOF (256) isn't mistake from a byte. Since outputting EOF is also not defined, . on 256 works as reading, and therefore , ...

A famous paper, Typing dynamic typing, written by Doaitse Swierstra and Baars, provides a simple type safe compiler. They give a Haskell implementation. A version of that Haskell implementation is given as an exemple answer below. What is the shortest implementation of this timeless classic in va...

Can the Tune be Played? Explanation A broken musical keyboard has keys labelled with positive integers. It is broken in two ways: It takes a long time to process key presses: after pressing the key labelled with the number \$n\$, there is a gap of \$n\$ seconds before any note is heard. So, for ...

We require that challenges have objective winning criteria, for reasons that have already been covered in various questions (in particular, see the link below). However, we receive many questions that do not have these criteria, and they are really annoying for many reasons. There have been a few...

Left alone, I'm a word with five letters. I'm honest and fair, I'll admit. Rearranged, I'm of no use to trains. Again, and I'm an overt place, warm and well lit. What am I?

Comparing the vote tallies on Proposal to lock the Language Showcase as historically significant before and after the Showcase of Languages was closed and locked leads me to the following conclusion. The community agrees the showcase is not an optimal solution. While it is the best/only thing o...

Related | Related Given an ASCII art with |, _, and , check if you can draw the art in one stroke. Description Your task is, if the ASCII art is representing lines, then check if you can draw the whole art in one stroke, which means: without drawing an already drawn line again lifting and cont...

We will soon be turning on an experiment on Stack Overflow which will test out a new Ask Wizard. The experiment will only target users asking their first questions on the site (to be more specific, questions that would qualify for inclusion in the First questions queue). The new wizard draws insp...

The Nineteenth Bakery code-golf You are in a strange city, looking for the fabled Nineteenth Bakery, where it is said they sell the most delicious deleted posts. The order of shops here is strange. Each street has a number of shops on it, but they are not numbered in order. Instead, each shop has...