Linked Questions

Related but very different. A boustrophedon is a text where every other line of writing is flipped or reversed, with reversed letters. In this challenge, we will just reverse every other line, but ...

Given a matrix, output a representation of the matrix where the top left element is on top, the anti-diagonal is the central row and the bottom right element is at the bottom. For example, consider ...

Background In most reasonable programming languages, it's very easy to rotate the rows or columns of a 2D array. In this challenge, your task is to rotate the anti-diagonals instead. Recall that the ...

There exists a bijection between the natural and rational numbers that works (approximately) like this: You create a 1-indexed 2-dimensional grid. In every field of this grid with position ...

A Shift matrix is a binary matrix with one superdiagonal or subdiagonal formed by only ones, everything else is a zero. A superdiagonal/subdiagonal is a diagonal parallel to the main diagonal, which ...

Inspired by this question Another way to unroll a 2D image into a 1D string is to use an Hilbert Curve. There are many version of this curve, depending on the number of iterations used while ...

The positive rational numbers can be shown to be numerable with the following process: Zero has the ordinal 0 Arrange the other numbers in a grid so that row a, column b contains a/b Plot a diagonal ...

As part of its compression algorithm, the JPEG standard unrolls a matrix into a vector along antidiagonals of alternating direction: Your task is to take the unrolled vector along with the matrix ...

I've been doing word searches recently, and I thought it would be so much easier if all of the words read left-to-right. But rewriting all the lines takes a lot of effort! So I'm enlisting code ...

A zigzag scan is a method of encoding 2D information in one dimension: Write a function or program that, given a one-dimensional string of printable ASCII characters, will reverse the zigzag scan to ...