Quine: Difference between revisions
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(Ruby: delete the more verbose file-reading example, as the next example is equivalent and simpler) |
(Ruby: improve wording and formatting; Rust: improve formatting) |
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=={{header|Ruby}}== |
=={{header|Ruby}}== |
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Found online: |
Found online: |
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<lang ruby>_="_=%p;puts _%%_";puts _%_</lang> |
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A shell session demonstrating that it is valid: |
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<pre>$ ruby -e '_="_=%p;puts _%%_";puts _%_' |
<pre>$ ruby -e '_="_=%p;puts _%%_";puts _%_' |
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_="_=%p;puts _%%_";puts _%_ |
_="_=%p;puts _%%_";puts _%_ |
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_="_=%p;puts _%%_";puts _%_</pre> |
_="_=%p;puts _%%_";puts _%_</pre> |
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A more readable version of the above example: |
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more readably: |
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<lang ruby>x = "x = %p; puts x %% x"; puts x % x</lang> |
<lang ruby>x = "x = %p; puts x %% x"; puts x % x</lang> |
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The < |
The <code>%p</code> specifier outputs the result of calling the <code>.inspect</code> method on the argument. |
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Even shorter (by a few characters): |
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<lang ruby>puts <<e*2,'e' |
<lang ruby>puts <<e*2,'e' |
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puts <<e*2,'e' |
puts <<e*2,'e' |
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e</lang> |
e</lang> |
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Perhaps the simplest: |
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<lang ruby>eval s="puts'eval s='+s.inspect"</lang> |
<lang ruby>eval s="puts'eval s='+s.inspect"</lang> |
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Using the method on Wikipedia (0.9-pre-compatible, does not compile on Rust 1.0.0 and newer): |
Using the method on Wikipedia (0.9-pre-compatible, does not compile on Rust 1.0.0 and newer): |
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<lang rust> |
<lang rust>fn main() |
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fn main() |
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{ |
{ |
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let q = 34u8; |
let q = 34u8; |
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i+=1; |
i+=1; |
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} |
} |
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| ⚫ | |||
} |
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| ⚫ | |||
A quine in the shape of a circle: |
A quine in the shape of a circle: |
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