Questions tagged [string]
A competition to solve a particular problem through the usage and manipulation of strings.
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Repeating terms of a given sentence [closed]
Program
Write a program to display repeating terms of a given sentence.
Explanation
The program must output the repeating terms of two or more letters from the given input (input is a sentence ...
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Variable length Fibonacci word
Challenge
For any two non-empty strings A and B, we define the following sequence :
F(0) = A
F(1) = B
F(n) = F(n-1) + F(n-2)
Where ...
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Outsmart the boffins at New Scientist (string rotation)
The brainiacs at New Scientist tweeted this morning that "The word STABLE has the neat property that you can cycle the first letter to the end to make a new word: TABLES. And you can do it again ...
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Overwrite a string on a tape
Take the string abcdfghjk. To overwrite it, starting from f, with the string wxyz, you would ...
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Calculate longest Stack Exchange streak
Introduction
This challenge is inspired by the Meta Stack Exchange question The longest consecutive days streak; it turns out that the URL ...
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Pretty printing JSON
I want format a JSON string into human-readable form. A string like this:
...
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(Σ*)² ⟲ Σ* (Round-Trip a String Pair)
We're back! And this time with an objective scoring criteria!
This is a challenge I thought of recently which I think is not hard but allows for a wide range of possible solutions. Seems like a ...
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What's my TIO uniqueness?
Try it online! currently has 680 listed languages, all of which are searchable. For most of those languages, when searching for it, you don't have to enter the entire string. For example, entering <...
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Un-pipe an Elixir expression
Elixir is a programming language with a feature called the pipe operator, |>, similar to the pipe in Bash and other languages. It passes the result of an ...
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(Σ*)² ⟲ Σ* (aka Round-Trip a String Pair) [closed]
This is a challenge I thought of recently which I think is not hard but allows for a wide range of possible solutions. Seems like a perfect fit for the creativity of PPCG users :)
Your Task
Define two ...
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Decode Polybus Square/Tap Code/Prison Code
The code has a lot of names, but is very simple:
1 2 3 4 5
1 A B C D E
2 F G H I J
3 L M N O P
4 Q R S T U
5 V W X Y Z
A letter is coded by its coordinates, ...
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Check if B is composed of substrings of A of length n
Given two strings \$ A \$ and \$ B \$ and a positive integer \$ n \$, determine whether \$ B \$ is composed entirely of (possibly overlapping) strict substrings of \$ A \$ of a length of at least \$ ...
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Rotate brackets until they're balanced
Take the string of brackets ]][][[. When you rotate it to the right once, you get []][][. If you rotate it again, you get ...
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I Rot-13 the source code, you Rot-19 the output!
This is alternate of a rip-off of a rip-off of a rip-off of a rip-off of a rip-off of a rip-off. Go upvote those!
Your task, if you accept it, is to write a program/function that outputs/returns its ...
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I palindrome the source code, you palindrome the input!
This is a rip-off of a rip-off of a rip-off of a rip-off of a rip-off. Go upvote those!
Your task, if you accept it, is to write a program/function that outputs/returns its input/args. The tricky ...
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Inverse Ax+B/Cx+D sized function
Let's assume that
$$
f(x) = \frac{Ax+B}{Cx+D}
$$
Where, \$x\$ is a variable and \$A\$,\$B\$,\$C\$,\$D\$ are constants.
Now we have to find out the inverse function of \$f(x)\$, mathematically \$f^{-1}(...
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Find the Best Set of Adapters
I'm trying to plug this really old phone into my computer but the phone seems to use a very obscure plug. Luckily I have some adapters. Unfortunately, I can't figure out which of them to use to ...
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Compile Commentscript
Commentscript is a variant on Javascript that I made up for the purpose of this question. Only commented-out code is evaluated.
Javascript has two types of comments:
...
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votes
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answers
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Find the HTTP status code
Given the name of an HTTP status code, such as OK or Continue, output or return the corresponding number. Your code is limited ...
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answers
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Reverse source code and double the input
For today's challenge you have to take an input, and if your source code is reversed, then the input should be printed doubled.
Let's say your source code is ABC ...
user101144
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Alphabet printing challenge
This challenge is related
Challenge
Your task is to write as many programs/snippets as you can, where each one outputs/prints/ returns an alphabet. The first program must output the letter ...
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Autogrammatic pairs
For today's task, we have two programs, P and Q, both in the same language. Each of them receives a single-character input.
If P receives character K, P says how many times K appeared in Q. (You can ...
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votes
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Convert Gemtext to HTML
Gemtext is a very simple markup format used by the alternative web protocol Gemini. Write a Gemtext to HTML converter.
From the Wiki:
A line of text is a paragraph, to be wrapped by the client. It is ...
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Pangram "Hello, World!"
Your challenge: The code must print "Hello, World!" and nothing else.
Your restrictions: Your program must satisfy these requirements:
The program must be a pangram.
It must use every ...
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BalancE the UppercasE
Oh, No!
the sentences are out of balance.
Quick! balance them.
A word is defined as follows:
A sequence of letters [A-Za-z] separated by any non-letter character ([0-9] ~+- etc.)
A word is BaLanCeD ...
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answers
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Is this an anagram of its own source code? [duplicate]
I like anagrams. I like programs that reference their own source code. So this challenge combines them!
Input.
The input to the program could be anything, including letters, numbers, symbols, you name ...
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votes
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answer
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views
Generating minimal regular expression character classes
Background
Character classes are a standard way to indicate a set of characters to match in regular expressions. For example, the class [ab] matches a or b, ...
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answers
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Make a !!!Batch compiler/translator
!!!Batch is another derivative of the Windows Batch programming language, its wiki is here
Your challenge is to create an compiler/translator that reads a !!!Batch program and returns a Windows Batch ...
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Write A Book Cipher [closed]
Introduction
Book cipher
A Book cipher is a very unique method of a encipher. Here's how's it done:
You have a book / a document or a article (something full of text, the more pages of text the ...
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Print your username by ONLY using the characters in your username [closed]
You have to print out your username, by only using the characters in your username.
Standard loopholes are forbidden
This is not code-golf, so shortest does not win
Don't modify your username please
...
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votes
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answers
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views
Count strictly overlapping substrings
Given two strings a and b, count how many times b occurs as a substring in ...
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answers
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How likely is this mutation?
In my previous bioinformatics challenge, I asked you to mutate a DNA sequence. This time, I'd like you to evaluate how likely a mutation, or a series of mutations, is.
The two types of substitutions ...
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Which Ninjutsu am I casting?
In the MMORPG Final Fantasy XIV, the Ninja class has the ability to use combinations of up to three handsigns (Ten, Chi and Jin) to perform a variety of ninjutsu skills.
The skill you cast depends on ...
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Evaluate left-or-right
Originally sandboxed by @xnor
Left-or-right is a very simple language @xnor made up. Its expressions are made of arrows < (left), ...
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Implement bottom (encode)
Challenge
The challenge is to implement the bottom encoding (only encoding, not decoding). There is a wide variety of existing implementations in the bottom-software-foundation org.
Bottom is a text ...
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Merge Two Paragraphs with Removing Duplicated Lines
Challenge
The goal of this challenge is to make a function that takes two paragraphs and output a concatenated result with removing the duplicated overlapped lines due to redundancy (but a single copy ...
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votes
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answers
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Speed of Lobsters
From the subreddit r/SpeedOfLobsters:
Edit the text of an image to create a new phrase
This meme format/style is pretty self-explanatory. Simply have a browse through the subreddit if you need more ...
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Sub-string Extractor with Specific Keywords
Challenge
The goal of this challenge is to make a function that takes an input string, a start keyword and a end keyword. The output extracted result is from (but excluded) the given start keyword to (...
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Interpret Interval Notation
Interval notation is a way to write complicated range bounds more conveniently and concisely than writing an inequality. The challenge, should you choose to accept it, is to write a program or ...
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answers
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Vandalizing Marquees
A marquee is a low-tech board that allows customizable letters. For example, here is a marquee:
SALE ON SNEAKERS
However, someone might come along and vandalize it ...
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Compute all close strings quickly
Input
A string S of length between 10 and 16 inclusive. The characters are taken from the 95 printable ASCII characters, byte values 32 (...
user7467
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votes
8
answers
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How Many Atoms?
Your task is when given a chemical formula as input, output the total number of atoms in the formula.
Input
A chemical formula in any reasonable format. Each chemical formula has the following:
A ...
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Animal-Alphabetical Sequence
The Animal-Alphabetical Sequence is an infinite string of letters built accordingly to the following procedure:
Start with the letter A;
Replace each letter with ...
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increment a binary number without arithmetic manipulations [closed]
Input: binary string
Output: binary string that represents the binary input + 1
Example: Given 10111 as an input, output 11000
...
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A Snake, A Camel And A Kebab
As many of you will know, almost every programming language has a standard casing system; unfortunately, we have not been able to agree on a singular system to use and now must frequently switch ...
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(1) Determine the amount of statues
Inspired by this stack of little statues that are currently on my desk at work, given to me by my colleagues from Sri Lanka when they visited The Netherlands:
This is split into two different ...
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(2) Can the statues be stacked?
Inspired by this stack of little statues that are currently on my desk at work, given to me by my colleagues from Sri Lanka when they visited The Netherlands:
This is split into two different ...
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votes
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Iterate over the neighborhood of a string
Input
A string S of length between 2 and 30. The only letters in the string will be a or b.
Output
All strings within ...
user7467