Obligatory Quine Challenge

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Rules

Using your language of choice, golf a quine.

A quine is a non-empty computer program which takes no input and produces a copy of its own source code as its only output.

No cheating -- that means that you can't just read the source file and print it. Also, in many languages, an empty file is also a quine: that isn't considered a legit quine either.

Additionally, your quine may not consist of only one data section. This includes HTML programs without tags (thus only printing their source), and the Golfscript program 1.

Scoring

The shortest program in bytes wins. Trailing newlines must be counted if your program outputs one.

code-golf quine

posted 5 months ago

CC BY-SA 4.0

ATaco‭

46 rep. 1 1 8 0

Permalink History

not constructive

This question cannot be answered in a way that is helpful to anyone. It's not possible to learn something from possible answers, except for the solution for the specific problem of the asker.

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Vyxal/Keg , 8 bytes `:. …

5mo ago

+2

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[Husk], 8 bytes S+s"S+s …

5mo ago

+1

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Jq, -rn 18 bytes ``` "|@js …

1d ago

+0

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Scala 3, 80 bytes ```lang-sca …

~9h ago

5 comments

Might wanna change the name to something better, just sayin' — Razetime‭ 5 months ago

"that means that you can't just read the source file and print it" Does JavaScript "toString()" count as reading the source file? — Moshi‭ 5 months ago

I posted a PHP simplistic answer that was rejected based on a reference to SE rules. Can we get those rules (a) at a minimum linked inside this question (the only link is to a Wikipedia definition, which since Wikipedia can change beyond our control is not definitive) and (b) preferably spell out all the rules somewhere on Codidact (Meta to start, eventually a Help/FAQ page). And if that info. is already on Codidact, include a link here. — manassehkatz‭ 5 months ago

I've asked a meta question regarding whether or not we should import the FAQ questions from SE, which includes a comprehensive definition of a valid quine. — Lyxal‭ 5 months ago

I was also thinking of reposting the quine question, but you beat me to it. One thing that I was thinking of changing was to allow function submissions, which would let some answers be somewhat distinct from the old question. — Jo King‭ 5 months ago

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Vyxal/Keg , 8 bytes

`:.,`:.,

Try it online! (Keg)

The explanations are the same for both languages, seeing as how Vyxal is heavily based on Keg.

Explained

`:.,`	# Push the string ":.,"
:.,	# Duplicate it, print it raw and then print it nice

posted 5 months ago

CC BY-SA 4.0

5mo ago

Lyxal‭

141 rep. 1 4 16 12

Permalink History

0 comments

+2

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Husk, 8 bytes

S+s"S+s"

Try it online!

Basically Leo's original quine.

It concatenates the string evaluated version of S+s to itself.

So: "S+s" + "\"S+s\"" gives the original code.

posted 5 months ago

CC BY-SA 4.0

Razetime‭

734 rep. 19 20 90 39

Permalink History

0 comments

+1

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Jq, -rn 18 bytes

"|@json+."|@json+.

"|@json+."          # the string
          |         # through the filter
           @json    # json encoded
                +   # concatenated with
                 .  # itself

^{* -rn flags are only to output normally and get no input (respectively)}

posted 1 day ago

CC BY-SA 4.0

Wezl‭

61 rep. 0 0 6 2

Permalink History

0 comments

+0

−0

Scala 3, 80 bytes

@main def m={val s="@main def m={val s=%c%s%1$c;printf(s,34,s)}";printf(s,34,s)}

Try it in Scastie!

The printf replaces %c and %1$c in string s with the quote character (34 in decimal), and replaces %s with the contents of s.

posted about 9 hours ago

CC BY-SA 4.0

user‭

106 rep. 1 10 11 7

Permalink History

Communities

Obligatory Quine Challenge

Rules

Scoring

5 comments

4 answers

Vyxal/Keg , 8 bytes

Explained

0 comments

Husk, 8 bytes

0 comments

Jq, -rn 18 bytes

0 comments

Scala 3, 80 bytes

0 comments