All Questions
223
questions
23
votes
11
answers
2k
views
Binary Slashes Display
(easy mode of Seven Slash Display)
Given a positive integer (or alternatively, a string/list of bits of its binary representation) output it with this diagonal ASCII-art formation:
(output for 53 / <...
- 8,612
6
votes
4
answers
1k
views
Hoop, Hoop, Hoop, Hoop, Eye-Eye-Eye-Eye
The Horrible Histories song "Learn Your Hieroglyphics" mentions a fanmade number system. Numbers are written as a sum of 10's ("hoops") and 1's ("eyes"), for example 99 ...
- 1,391
11
votes
23
answers
922
views
Construct a uInt from an array of bits
Task is simple!
Take an array of binary values (can be boolean, 0/1, etc.) and use those bits to construct an n-th bit long unsigned integer (return type does not need to be an unsigned integer, just ...
- 319
14
votes
14
answers
2k
views
Break an integer into even- and odd-indexed bits
Objective
Given an integer \$n\$ interpreted as two's complement binary, output two integers, namely the integer consisting of \$n\$'s bits at places of \$2^0, 2^2, 2^4, \cdots\$, and the integer ...
- 5,961
6
votes
2
answers
356
views
Compact Binary Representation
Background
Often, when storing a number in binary with some maximum, we simply round the maximum to the next power of two then allocate the number of bits nececairy to store the whole range. Lets call ...
- 12.7k
10
votes
6
answers
745
views
Convert from Spoken Binary
This is an exact inverse of the question Convert to Spoken Binary. This introduction is copied from there.
Introduction
In the video the best way to count, binary is proposed as the
best system of ...
- 2,093
16
votes
6
answers
1k
views
Convert to Spoken Binary
Introduction
In the video the best way to count, binary is proposed as the best system of counting numbers. Along with this argument is a proposal on how to say numbers in this system. First, we give ...
- 2,093
18
votes
39
answers
2k
views
Rudin-Shapiro sequence
The Rudin-Shapiro sequence is a sequence of \$1\$s and \$-1\$s defined as follows: \$r_n = (-1)^{u_n}\$, where \$u_n\$ is the number of occurrences of (possibly overlapping) \$11\$ in the binary ...
- 48.7k
20
votes
23
answers
2k
views
Diagonal Binary Sequence
Challenge:
Given a positive number \$n\$, convert it to binary, and output a sequence where all 1s form a top-left to bottom-right diagonal line, including a ...
- 128k
16
votes
5
answers
726
views
Prefix code generator
In this challenge, we consider an encoding from positive integers (up to a limit) to binary sequences. Some examples:
...
- 77.5k
13
votes
40
answers
3k
views
Convert binary to unary
The title says it all; Given a number in the binary (base-2) number system, output the same number expressed in unary (base-1).
You should take the binary number as a string (optionally with a ...
- 8,612
1
vote
1
answer
174
views
Start a program so that /proc/self/cmdline contains a binary representation of the input number
I am sorry for the very long description. But i think some information of how /proc/self/cmdline works and how it can be used to get a integer input was necessary.
...
21
votes
13
answers
2k
views
Minkowski's ?(x) for rational x
Here is Minkowski's question mark function:
It is a strictly increasing and continuous function from the reals to themselves that, among other unusual properties, maps rational numbers to dyadic ...
- 3,845
21
votes
8
answers
3k
views
How many xor'ed waves?
In this challenge, you're given a list of overlapping waves. Each wave is a finite list with n truthy values, then n falsy ...
- 1,017
16
votes
7
answers
1k
views
Largest Binary Area
Take the sequence of all natural numbers in binary, (1, 10, 11, ..) then write them vertically beside each-other like this (least significant bit on top; 0s have ...
- 12.7k