Questions tagged [polyglot]
For challenges involving code that runs in multiple programming languages.
108 questions
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Abuse some parsers your way to a Polyglot [closed]
Many polyglots fill in the blanks between languages by either making code that is ignored in one language or loading code dynamically.
This time, let's write a polyglot that works without that. This ...
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Write a piece of Quine code that can be excuted by both C and Python [duplicate]
Write a piece of code that is compatible with both C and Python compilers/interpreters, which can output its own source code.
Quine is quite easy, but how about this double language version?
Hint:
To ...
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PHP+C polyglot solution to mixed types
Some built-in functions in PHP return mixed types, like file_get_contents that returns both string or ...
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Reverse the polyglot, change the language
Task
Write a polyglot in two languages that when run, outputs the name of the language it is run in. Additionally, this program must also output the other language's name if the source code is ...
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Need some feedback with PHP+C polyglot code and class/struct properties [closed]
If you consider the following PHP+C polyglot snippet, there is a problem regarding class property access in the printf call:
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Polyglot Quiz (Robbers' thread)
This is the robbers' thread. For the main rules to this challenge see the cops' thread
In this challenge, robbers will choose a cop's vulnerable or safe post and try to figure out a pair of languages ...
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Polyglot Quiz (Cops' thread)
This is the cops' thread of a cops-and-robbers challenge. The robbers' thread can be found here
In this challenge as a cop you will choose two programming languages A and B, as well as a non-empty ...
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Case Conversion Polyglot
Your task is to write a program that performs case conversion from plain text, and other case formats, into one of the specified formats below. Inputs will be either plain lowercase text, or one of ...
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12 with no 1234567890, but polyglot
This is my 12th question, so I thought of this idea.
Goal:
Output 12, with any preceding or trailing whitespace permitted
In as many languages as possible (where different versions or flags count as ...
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Universal Unicode Clock
Plot contrivance
You wake up to find that something has gone horribly wrong! Your time machine has malfunctioned and you are lost sometime between June 2022 and October 1991.
You check the computer ...
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Two In One: Guess That Language - Robbers
Cops' challenge
This cops-and-robbers challenge challenges the Cop to write a non-empty program that, when run, produces some non-empty output in language A, and, when reversed, produces some non-...
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Two In One: Guess That Language - Cops
Robber's challenge
This cops-and-robbers challenge challenges the Cop to write a non-empty program that, when run, produces some non-empty output in language A, and, when reversed, produces some non-...
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Add a hidden language to a polyglot
Inspired/mostly copied but I don't think it's a dupe. Also Inspired.
In this challenge, you will create polyglots that include all languages from previous answers, and another language which you won't ...
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Irradiated Polyglots
Design a function or program that, when run normally, outputs the triangular numbers. However, when any single character is deleted, the program/function should not function in the original ...
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Are you a probabilist or a physicist?
Hermite polynomials refer to two sequences of polynomials:
The "probabilist's Hermite polynomials", given by
$${He}_n(x) = (-1)^n e ^ \frac {x^2} 2 \frac {d^n} {dx^n} e ^ {-\frac {x^2} 2}$$
...
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Polyglot Interpreters
Challenge
Choose any number of languages. Call this set L.
Write a program so that running it in any language in L produces an interpreter for a different language ...
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Make a polyglot generator
A polyglot is a program that runs in several languages.
Your challenge is to:
Choose at least two languages (Different versions count as different languages)
Create a program or function that takes ...
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(Error) quines, hello world, polyglots, oh my!
Introduction
A quine is a program that outputs its own source code. For example, a well-known Python quine is _='_=%r;print(end=_%%_)';print(end=_%_). Running it ...
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Pristine Polyglots
As the title says, you are to create a pristine program in as many languages as possible. A pristine program, taken from here, is:
Let's define a pristine program as a program that does not have any ...
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Build an alphabetised polyglot
As TIO can show, every letter of the Latin alphabet is represented when it comes to languages. For every letter there is at least 1 programming language whose name begins with that letter. Your task ...
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Inspired by HQ9+: 4-Behavior Polyglot
Create a program that can be run in 4 different languages such that:
One language prints "Hello World!"
One language outputs its own source code
One language outputs 99 bottles of beer on ...
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The Return of FizzBuzz
Intro
Beauty lies in the eye of the beholder. Output lies in the choice of the compiler. There are some codes that give different outputs based on what language they are executed in. Take for ...
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Program that compiles into itself
We've had lots of questions about quines, programs where the source code and output are identical. For compiled languages, there are other combinations: we've already had a question about writing a ...
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Polyglot "Hello world" in Fortran and Lisp [duplicate]
Simple challenge: The code must be both valid Lisp and valid Fortran, and must print out "hello world" in both.
Note: I've sunk about 5 hours into this at this point, I'm not even sure it's possible ...
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Polyglot self-interpreter time
Your task is to make a program which interprets the language it is run in, but also works in many languages.
Let's say you make a Brainfuck-Underload self-interpreglot, as it will be called. Run in ...
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Polyglot Iterative Quine
Introduction
A polyglot is a program that is valid in multiple languages at once. An iterative quine is a program that outputs another program that outputs another program that outputs the source of ...
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Restricted-source polyglot string
Your goal is to write a program that prints the string abc in two languages. However, while the full code will print abc in one ...
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Print your char count in words, in many languages
This challenge is inspired by my earlier challenge "Create a program that prints the amount of characters it has, in words".
This challenge's rules are simple: make a program that prints its ...
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Don't get banned from stack exchange! [closed]
I'm sure this is going to spark some controversy, but let's do a practical demonstration.
The objective of this is simple, using the new code of conduct and no input, print out my pronouns ( "he/him"...
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Write a "hello world" program that can be compiled/interpreted as two different languages simultaneously [duplicate]
Rules:
Your program must print "hello world" when executed
Your program must be interpretable or compilable into 2 or more languages
Your program must require no input or arguments
Languages with ...
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An OEIS polyglot
This is an answer-chaining challenge relating to the OEIS.
Oh, the justification for this is because a company needs one program to print out their OEIS sequences real bad and they have every ...
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A poly-moly-holy quine. (Well, it's not, but the title's cool.)
This is an answer chaining puzzle, where each answer must add on to the last.
The \$n\$th submission must output its own source code in the \$n\$th language and the \$n−1\$ languages before it.
A ...
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Polycops and Robbers (Robbers' Thread)
This is the robbers' thread, the cops' thread is here
A polyglot is a program, that without modification, can run in multiple languages.
Robbers' Challenge
First, find a vulnerable cop's answer, ...
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Polycops and Robbers (Cops' Thread)
This is the cops' thread, the robbers' thread is here
A polyglot is a program, that without modification, can run in multiple languages.
Allowed languages
Any language that was made before the ...
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Overlapping Polyglots
Unlike many C&R challenges, this does not require a separate robbers post; the goal of the robbers is to crack the previous answer and then post a new one as a cop.
As answerers, you will write a ...
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Add a egaugnaL to a polyglot
This is an answer-chaining question, which means that all answers are affected by those before them.
The task
The n-th answer to this question must run in all languages that are present in answers ...
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Quine of orders
Write a program that, when run in different languages, outputs a different byte permutation of the code in each language. The exact source code is counted as one permutation.
Here "different language"...
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This code errors on *this* and *that*, is it really written in them?
Inspired by I'm not the language you're looking for!
Challenge
Choose two different programming languages, and write a program that prints the following line to stdout (or equivalent):
...
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The Pyramid of Languages
Write a code that runs or compiles in as many programming languages as possible and prints a newline separated list of names of previous and current programming languages.
Every used language must ...
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Wait, what language is this?
Recently I had the pleasure of writing a Haskell program that could detect if the NegativeLiterals extension was engaged. I came up with the following:
...
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404 - Unique 404 page not found
Inspired by a polyglot on the Stack Overflow 404 page:
Goal
Your goal is simple, to create a polyglot that outputs the number 404, and then terminate, in as many languages as possible.
Restrictions
...
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Hello World in Multiple Languages
Task
Create a program or a function that is valid in multiple programming languages, and when compiled/interpreted as a different language outputs "Hello, World!" in a different natural language.
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Life and Death of Trees
The Challenge
Write a program that takes an integer N as input, and outputs the stage of life or death that a tree is currently in. N will always be between 0 and 10.
The Stages of Life and Death
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Polyglot the English Alphabet! [closed]
In this polyglot challenge, you will work together to figure out how to output all the 26 letters of the English alphabet!
How does this work?
For each answer, you must pick a new language (or a new ...
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Determine your language's version
Your challenge is to write a polyglot that works in different versions of your language. When run, it will always output the language version.
Rules
Your program should work in at least two versions ...
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Polyglot the (non constant) OEIS!
Disclaimer: This is heavily inspired by "Polyglot the OEIS!" but fixes the problem that lead to closure (see the output section) and was re-posted as to not invalidate answers.
Introduction
...
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'abc' and 'cba'
Your task is simple, write a single code snippet that when executed in one language outputs only the string 'abc' and when executed in another language outputs ...
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Polyglot the OEIS! [duplicate]
Note: This challenge has been moved to Polyglot the (non constant) OEIS! to avoid closure.
Introduction
We all know and love the on-line encyclopedia of integer sequences (OEIS). So what if we made ...
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Fake divisor sum polyglots
The task
In this challenge, your task is to write a program in a programming language L that takes a positive integer n, and outputs the sum of the proper divisors of n (sequence A001065 on OEIS).
It ...
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Cyclic Polyglot Challenge (Cops)
Cyclic Polyglot Challenge
This is the cops thread. You can find the robbers thread here.
Cyclic Polyglot
A N-element cyclic polyglot is a complete program that can be run in N different languages. ...
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