Questions tagged [hexadecimal]
Hexadecimal, also known as base 16, is a number counting system using the digits 0—9 and A—F. Use this tag for challenges related to hexadecimal.
29
questions
23
votes
23answers
2k views
Find the closest three-digit hex colour
In CSS, colours can be specified by a "hex triplet" - a three byte (six digit) hexadecimal number where each byte represents the red, green, or blue components of the colour. For instance, ...
-2
votes
11answers
207 views
Convert alphanumeric (base-36) sentences into hexadecimal (base-16) sentences
I use "sentence" here loosely to mean "any sequence of words separated by spaces" and "words" to mean "sequences of alphanumeric (hexatrigesimal) characters unseparated by spaces".
Conversion is from ...
0
votes
1answer
208 views
Python code to produce C++14 hex integer literal with ticks
tl;dr? See bottom for The Competition
Integer literals
While programming, the 64-bit hexadecimal literal 0x123456789abcdefL is difficult to gauge the size of. I ...
1
vote
5answers
611 views
0xDEADBEEF is not tasty, but still 0xFEEDBEEF
Inspired by "You had me at hello"
Introduction
For those who don't know, hexadecimal is a base system like decimal. Contrary to decimal however, it uses 16 (hence the name) digits instead of 10.
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52
votes
30answers
6k views
Let's golf a BIBABOBU decoder
While I was traveling in the future, I noticed a funny game among kids circa 2275. When they don't want their great-great-great-great-grand parents to understand what they're saying, they use the ...
1
vote
0answers
126 views
Render a monospaced bitmap font from image [closed]
Input is in this format:
image fontwidth fontheight rowwidth xoffset yoffset xgap ygap non-existent charstart thetextitself
thetextitself: The text that should ...
20
votes
32answers
3k views
Swap the Endianness
As most of you probably know, (byte-addressable) hardware memories can be divided into two categories - little-endian and big-endian. In little-endian memories the bytes are numbered starting with 0 ...
1
vote
28answers
2k views
Binary to Hexadecimal
Convert a binary number (of any size) into a hexadecimal number.
Input
A POSITIVE binary number with just the 0s and 1s. A ...
11
votes
19answers
1k views
How to convert HEX2 to RGBA?
The world of art is full of colour, but the world of the network is even fuller than the world of art of diferent colours and it's renderings. That's why we need to know how to convert one type of ...
46
votes
25answers
4k views
Better Hex Color Codes for Your Internet
Hex triplets such as #ffffff (white) or #3764ef (blueish) are often used to denote RGB colors. They consist of ...
23
votes
7answers
788 views
Rotate a camera; save an Astronaut
Note: Minor spoilers for The Martian are in this challenge. Read ahead with caution
The Martian is a Science Fiction novel about astronaut and botanist extraordinaire, Mark Watney, who has been ...
25
votes
21answers
3k views
Converting “0xUsernames”
0xUsernames
There's so many people using a messaging service that they're running out of space to store all the usernames! To fix this, they are going to start storing usernames as hexadecimal, where ...
45
votes
58answers
3k views
30
votes
15answers
1k views
Output the HTML colors
The 16-color CGA palette (also known as the HTML colors) is a set of 16 colors used by early graphics adapters. The goal of this challenge is to output all 16 of them, in hex format (...
22
votes
25answers
2k views
Magic popcount numbers
There’s a famous tricky algorithm for counting the number of set bits in a 32-bit unsigned integer:
...
4
votes
1answer
626 views
14
votes
8answers
616 views
The 3x3 Hexa Prime Square Puzzle
The 3x3 Hexa Prime Square Puzzle
Introduction
We consider 3x3 squares of hexadecimal digits (from 0 to F) such as:
...
17
votes
12answers
1k views
The Woz Monitor
Challenge
I've recently gotten into 8-bit computers and are fascinated with the workings of them and others alike; thus the objective of this code golf, is to replicate a portion of the Woz Monitor, ...
25
votes
18answers
2k views
Convert to Bibi-binary
Bibi-binary is a numeric system invented by Boby Lapointe in order to represent numbers in letters which pronunciation seems funny.
Your task is to convert decimal numbers into Bibi-binary!
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15
votes
11answers
2k views
Convert xxd output to shellcode
Taking some output from xxd and turning it into usable shellcode by hand is no fun, so your job is to automate the process.
Rules
Your submission can be a function, lambda, script, or any reasonable ...
23
votes
8answers
1k views
“Add one” to every color in an image
You would simply take this image and make every color added one to every hexadecimal digit. For example, #49de5f would become ...
-6
votes
9answers
152 views
Print the input in hexadecimal [duplicate]
Challenges
You need to do a program that outputs the input string to hexadecimal!
For each character in the input string, convert it's ascii value to hexadecimal and output it out.
Example
...
23
votes
32answers
2k views
Convert a number to Hexadecimal
Challenge
Here's a simple one.
Write a function or program when given a number in base 10 as input, it will return or print that number's value in Hexadecimal.
Examples
...
45
votes
23answers
2k views
Hexadecimal and the Alphabet
In this challenge, you will receive an input, convert it to hexadecimal, make a couple changes, and output the result.
Because they are only 16 characters in hexadecimal, your code will need to be as ...
42
votes
48answers
5k views
Numbers that are actually letters
Given a non-negative integer input, write a program that converts the number to hexadecimal and returns a truthy value if the hexadecimal form of the number contains only the characters ...
-2
votes
1answer
200 views
Generate a hexdump of a file! [duplicate]
In this task, your goal is to write a program for generating hexdumps of files of arbitrary types.
Input
The input consists of a (relative or absolute) path to the file to be processed. It may be ...
26
votes
3answers
1k views
Pronouncing Hex
Pronouncing Hex
For those of you uninitiated with the show Silicon Valley, this challenge is inspired by an exchange that goes like this (YouTube):
...
10
votes
35answers
5k views
Hexadecimal Counter
Hexadecimal is a base 16 counting system that goes from 0 to f. Your job is to make a counter that will display these numbers.
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23
votes
2answers
844 views
Help me procrastinate on my computer repairs!
This challenge is brought to you by real (and tragic) inspiration. Recently, the number row on my keyboard has been a bit sporadic. The keys 1-9 work sometimes--but ...
