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This is a simple challenge which hopefully may lead to some creative answers.
Quoting Wikipedia: "Dual-tone multi-frequency signaling (DTMF) is an in-band telecommunication signaling system using the voice-frequency band over telephone lines between telephone equipment and other communications d...
Given a binary string, that is it contains only 0s and 1s (number of zeros equals the number of ones) We need to make this string a sequence of alternate characters by swapping some of the bits, our goal is to minimize the number swaps.
For example, for the string "00011011" the minimum number ...
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I recently saw that someone had edited an answer chaining question to have code-challenge. At first I balked at that, and after checking the first page of answer-chaining, I confirmed my original thought that answer-chaining challenges usually don't have another winning criteria, which led me to ...
Output an integer sequence not on OEIS
Your task is to output an integer sequence with infinite number of elements not on OEIS at the time your program is running. Shortest code wins.
Rules
Your program may output the nth term given the input n, or an infinite stream of integers.
Your program...
TeX, 240 bytes
\newcommand{\f}[1]{\h{\g{#1}{\h{\hphantom{\g{#1}{\#}}}{\g{#1}{\#}}\\}}{\g{#1}{\h{\g{#1}{\#}}{\g{#1}{\#}}\\}}}\newcommand{\g}[2]{\begingroup\count0=1\loop#2%
\advance\count0 by 1\ifnum\count0<#1\repeat\endgroup}\newcommand{\h}[2]{#1#2#1#2#1}
Example usage
\documentclass[12pt,a4p...
cops-and-robbers code-golf file-system
Try Languages Online (cops)
This is the cops' post. The robbers' post is here.
Background
You can skip this section if you want, it's unnecessary.
You have been hired by a company to make a website called Try Languages Online1. Basically, you pick a...
