A competition to solve a particular problem through the usage and manipulation of strings.
20
votes
2answers
433 views
On this site we obey the laws of thermodynamics!
And in particular the second law: the entropy of an isolated system increases over time.
For this challenge,
An "isolated system" will be taken to be a program or function (abbreviated as "program" ...
24
votes
19answers
3k views
Head, Shoulders, Knees and Toes, Knees and Toes
Introduction:
I think we all know it, and it has probably been translated in loads of different languages: the "Head, Shoulders, Knees and Toes" children song:
Head, shoulders, knees and toes, ...
0
votes
0answers
105 views
“I am Lord [name]” anagram generator [on hold]
In Harry Potter and the Chamber of Secrets we see that
Tom Marvolo Riddle
is an anagram for I am Lord Voldemort.
Task
Write a function that the user can pass 2 string arguments to as inputs: the ...
19
votes
6answers
1k views
Magic mirror madness
Introduction
I have a room full of magic mirrors.
They are mysterious artifacts that can duplicate any item, except another magic mirror.
More explicitly, a duplicate version of the item will appear ...
22
votes
23answers
2k views
Alphabetically permute a string
Task
Your goal, should you choose to accept it, is to write a program, that, given an input string (or array of characters), outputs every possible permutation of the letters in that string. I'm ...
6
votes
5answers
331 views
Build me a brick road! [duplicate]
I need help making a brick road to go beside my brick wall!
\ \__\ \__\ \__\ \__\ \__\ \__\ \__\ \__\ \__\ \__\ \__\ \
\__\ \__\ \__\ \__\ \__\ \__\ \__\ \__\ \__\ \__\ \__\ \...
0
votes
0answers
57 views
French Conjugation code [duplicate]
If you've ever studied a language you will know what conjugation is.
It is a verb changing form because of a pronoun an example in english is "I run" and "He runs". We will be doing french ...
-2
votes
0answers
78 views
Green but no Red [on hold]
Goal: print the word "Red" using all the letters in the word "Green" that are not in the word "Red."
Reserved words do not apply, and do not count towards spelling "green" or spelling "red." You can ...
0
votes
0answers
62 views
String Addition (Adding a Maximum of 9+9+9) [duplicate]
The Challenge
You must create a program that does addition using string manipulation, similar to:
999
+ 1
----
1000
Which means the maximum amount of addition possible is 9+9+9. And your code ...
19
votes
20answers
2k views
The Art of Word Shaping
The Art of Word Shaping
Given a binary matrix, and a string of letters, replace all 1's in the matrix from left, to right with the letters of the string. Once the letters have been formed into the ...
33
votes
8answers
2k views
Draw diagonal lines of text
Given an input of a list of words, output the words with their letters arranged
diagonally:
p
r
o
p g
u r
z a
a z m
n l m
d e i
c s n
o g
d
g e
o
l
f
(The ...
5
votes
2answers
299 views
Why don't you grow up?
Why don't you grow up?
In the past week a meme involving the young actor Aaron Bailey became trending in most Brazilian social networks. Entitled "why don't you grow up" it consists in repeating a ...
16
votes
7answers
503 views
Blueprint a sestina
A sestina is a format of poem that follows an interesting pattern that we can generate. It has six stanzas of six lines each, where the last words of each line in the first stanza make up the line ...
12
votes
8answers
408 views
Add weight to one side of a see-saw to balance it
Balancing Act
A see-saw (supposedly from the French 'ci-รงa', meaning 'this-that') forms a third of the holy trinity of playground equipment, along with the similarly ubiquitous slide and swing. A see-...
-5
votes
2answers
82 views
Friday 11/11/2016 11:11:11PM PST [duplicate]
As of posting this question, the date/time was:
Friday 11/11/2016 11:11:11PM PST
Wow, such a rare occurrence! This definitely deserves a challenge made for it!
Your task is to print the following:
...
4
votes
3answers
384 views
Identify the IP address
Identify whether the IP address is internal, global, link-local, or reserved.
Input should be an IPv4 address in decimal octets separated by periods.
Output should be 0 for link-local (RFC 3927), 1 ...
-3
votes
1answer
143 views
“L” the string! [duplicate]
Given a string, print the string "L"ed.
First, print it:
ABCDEF
Then, change the first character to the second character:
ABCDEF
BBCDEF
Then, change the first two characters to the third one:
...
9
votes
32answers
1k views
Find the “unwrapped size” of a list
Let's define the "unwrapped size" function u of a nested list l (containing only lists) by the following rules:
If l is empty, then u(l) is 1.
If l is non-empty, u(l) is equal to the sum of the ...
5
votes
0answers
151 views
Solve a Single Player Tron Game [closed]
Solve a Tron Game
Tron is a great game, and if you haven't played it the internet has MANY online versions available.
A fun challenge is to try to write an AI that plays Tron, which is normally much ...
15
votes
10answers
1k views
Print a ballot!
As you all know, today is election day!
Your task today is to print out a ballot, given an input.
If the input is Hillary Clinton, print:
Hillary Clinton ===-----===>
Donald Trump === ...
4
votes
1answer
97 views
Reverse an xxd hexdump [duplicate]
Given an xxd hexdump such as this one:
00000000: 1f8b 0808 4920 2258 0003 7069 6c6c 6f77 ....I "X..pillow
00000010: 2e74 7874 00d3 d707 8218 10d0 2799 c545 .txt........'..E
00000020: ba96 41a1 994c ...
2
votes
4answers
90 views
Character by Character [duplicate]
Your program must take in a string like:
test string
And must output each character adding one at a time like this:
t
te
tes
test
test
test s
test st
test str
test stri
test strin
test string
...
65
votes
75answers
14k views
Build me a brick wall!
Challenge
I need help building a brick wall! Throw together some code for me
using no input and produce the following output wall shown below:
_|___|___|___|___|___|___|___|___|___|___|___|___|___|...
105
votes
45answers
22k views
GO OUT AND VOTE
Today is November 8th, 2016, Election Day in the United States of America.
If you are a U.S. citizen eligible to vote, then go out and vote if you haven't already before answering this challenge. Do ...
15
votes
25answers
1k views
Product catalog
This problem is about separating a string representing a product identifier into three components.
The first part consists of upper and lower letters of arbitrary length which represents the ...
20
votes
14answers
3k views
Operator ASCII art
Challenge
Given an ASCII operator from the list below and a number n, draw an ASCII representation of the operator using that operator as the character with the line segments of the operator having ...
15
votes
31answers
2k views
Draw a hollow square of # with given width
I got this challenge from Codingame and am curious about better solutions than mine:
Given a width via standard input draw a hollow square of '#' in given width and length.
Example:
5 results in
##...
18
votes
4answers
371 views
Given a Diagram, Find X
Find X
I was inspired by math questions in which one is asked to "Find X" for a given shape. Originally, I was just going to have the challenge be to print the x and y location of the character 'x' ...
23
votes
9answers
742 views
Primenary Strings
A Primenary (binary-prime) string is one which, when written as a binary grid, every row and column has a prime total.
That's quite a vague explanation, so let's break it down with a worked example.....
10
votes
16answers
1k views
Wait… what was I going to say again?
I often forget what I wanted to say when the teacher calls on me to speak. Can you make me a tool to solve this?
Requirements:
The program must loop as follows:
First, take in input
If the input is ...
12
votes
6answers
213 views
Minimum insertions to make palindrome
Today you will be doing another palindrome challenge!
So, your task today is to take a string, and determine the minimum amount of letters required to insert to turn it into a palindrome.
For ...
27
votes
39answers
3k views
Print a letter Fibonacci
Given N (2 <= N), print N lines of the letter Fibonacci series like this (i.e. N = 5)
First, start with a and b:
a
b
Next, add the two lines.
a
b
ab
Keep adding the last two lines.
a
b
ab
bab
...
7
votes
8answers
293 views
What degree is this palindrome?
Your task is to determine the palindromic degree of a given non-empty string.
To do this, loop until one of the following conditions are met:
The string is not a palindrome.
You encounter a string ...
11
votes
11answers
374 views
Square-unspiral the string!
Given a string, first square it as follows:
First, write the string.
abcde
Next, write the string rotated one left.
abcde
bcdea
Keep doing this until you have written len(string) lines.
abcde
...
10
votes
5answers
260 views
How many significant figures?
Given a number as input, determine how many significant figures it has. This number will should be taken as a string because you have to do some special formatting. You'll see what I mean soon (I ...
25
votes
18answers
1k views
Pairable strings
A string is pairable if it can be split into subtrings, each of which is a string repeated twice consecutively. For example, aabaaababbbaba is pairable as:
aaba aaba
b b
ba ba
Given a non-empty ...
12
votes
2answers
304 views
Animate Adve the Adventurer
The challenge
Your task is to animate Adve the Adventurer moving through a creepy (i.e. Halloween) maze. Adve is a โข; he's character fluid, though, so he does not mind being represented by a ...
32
votes
32answers
2k views
Interlace strings
Your challenge is to write a program or function that, when given two strings of equal length, swaps every other character and outputs/returns the resulting strings in either order.
Examples
"Hello,"...
-2
votes
0answers
77 views
from another string? Is this string rotated [duplicate]
Given two strings, determine if the second string is rotated from the first string, and print a truthy or falsey value accordingly.
Test cases
"Hello world", " worldHello" -> True
"abcdefg", "...
8
votes
21answers
507 views
Encode the column cipher
Given a string to encode, and a number of columns (the key), encode the string as follows:
I will be using the example Hello, world! and the key 3
First, write out the number of columns:
1 2 3
...
15
votes
32answers
1k views
Encode the alphabet cipher
Given a string that contains lowercase letters, encode that string with the alphabet cipher.
To encode with the alphabet cipher (I will be using the example hello):
First, convert each letter in the ...
16
votes
16answers
812 views
Find the Wavy Words!
(Note: this is an easier spin-off of my previous challenge Find the Infinity Words!, which is a spin-off of my other previous challenge Find the Swirling Words! :) )
Definition of a Wavy Word:
If ...
27
votes
19answers
2k views
The Rule of Thumb for Title Capitalization
According to this site a general rule recommended by The U.S. Government Printing Office Style Manual is
Capitalize all words in titles of publications and documents, except
a, an, the, at, by, ...
128
votes
107answers
26k views
Trick or Treat polyglot
Since Halloween is coming up I though I might start a fun little code golf challenge!
The challenge is quite simple. You have to write a program that outputs either trick or treat.
"The twist?" you ...
24
votes
19answers
2k views
Alphabet Diamond
Alphabet Diamond
You've seen the amazing alphabet triangle, the revenge of the alphabet triangle and now it's time for the revenge of the revenge of the alphabet triangle!
Introducing...
THE ...
4
votes
8answers
242 views
Translate English Characters to the Emoji Flag Alphabet
Introduction
Emoji use a particular alphabet for their national flags, which allows one to put two symbols together to create the appropriate flag.
๐ฆ๐ง๐จ๐ฉ๐ช๐ซ๐ฌ๐ญ๐ฎ๐ฏ๐ฐ๐ฑ๐ฒ๐ณ๐ด๐ต๐ถ๐ท๐ธ๐น๐บ๐ป๐ผ๐ฝ๐พ๏ฟฝ...
50
votes
17answers
3k views
Fill in the Minesweeper clues
Minesweeper is a popular puzzle game where you must discover which tiles are "mines" without clicking on those tiles. Each tile is either a mine (represented by *) or a clue, i.e. a number from 0 to 8 ...
14
votes
6answers
326 views
Let's get ready for Halloween
I don't know about you all but I'm not preparing for Halloweenโโnever did never willโโbut, my neighbor is, so we'll help her out.
She needs help figuring out which brand of candy she has, but she has ...
18
votes
9answers
580 views
Balanced triplet brackets
A "triplet bracket" (that I made up for this challenge) is one of the following:
(...+...)
[...:...]
{...|...}
<...-...>
A balanced triplet bracket string (BTBS for short) is either an empty ...
34
votes
28answers
7k views
Take a ride on the Reading, If you pass Go, collect $200
Monopoly Board
For this code-golf challenge we will be building the board game Monopoly.
Rules:
Take no input.
Output a 11x11 board where each ASCII character forming the board is the first letter ...
