68 lines
2.7 KiB
Markdown
68 lines
2.7 KiB
Markdown
|
---
|
||
|
|
title: Fun with Quines
|
||
|
|
author: Collin J. Doering
|
||
|
|
date: Feb 21, 2015
|
||
|
|
description: Self replicating programs
|
||
|
|
tags: programming
|
||
|
|
---
|
||
|
|
|
||
|
|
Quines are cute.
|
||
|
|
|
||
|
|
>"Yields falsehood when preceded by its quotation" yields falsehood when preceded by its quotation.
|
||
|
|
|
||
|
|
See wikipedia on quines: <http://en.wikipedia.org/wiki/Quine_(computing)>
|
||
|
|
|
||
|
|
<!--more-->
|
||
|
|
|
||
|
|
``` {.haskell .code-term .numberLines}
|
||
|
|
a = "main = putStrLn $ \"a = \" ++ show a ++ \"\\n\" ++ a"
|
||
|
|
main = putStrLn $ "a = " ++ show a ++ "\n" ++ a
|
||
|
|
```
|
||
|
|
|
||
|
|
``` {.haskell .code-term .numberLines}
|
||
|
|
-- (C) Copyright Collin Doering 2013
|
||
|
|
--
|
||
|
|
-- This program is free software: you can redistribute it and/or modify
|
||
|
|
-- it under the terms of the GNU General Public License as published by
|
||
|
|
-- the Free Software Foundation, either version 3 of the License, or
|
||
|
|
-- (at your option) any later version.
|
||
|
|
--
|
||
|
|
-- This program is distributed in the hope that it will be useful,
|
||
|
|
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
-- GNU General Public License for more details.
|
||
|
|
--
|
||
|
|
-- You should have received a copy of the GNU General Public License
|
||
|
|
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
|
||
|
|
-- File: Quine.hs
|
||
|
|
-- Author: Collin J. Doering <rekahsoft@gmail.com>
|
||
|
|
-- Date: Apr 14, 2013
|
||
|
|
|
||
|
|
import Data.List (intercalate)
|
||
|
|
|
||
|
|
header = [ "-- (C) Copyright Collin Doering 2013"
|
||
|
|
, "-- "
|
||
|
|
, "-- This program is free software: you can redistribute it and/or modify"
|
||
|
|
, "-- it under the terms of the GNU General Public License as published by"
|
||
|
|
, "-- the Free Software Foundation, either version 3 of the License, or"
|
||
|
|
, "-- (at your option) any later version."
|
||
|
|
, "-- "
|
||
|
|
, "-- This program is distributed in the hope that it will be useful,"
|
||
|
|
, "-- but WITHOUT ANY WARRANTY; without even the implied warranty of"
|
||
|
|
, "-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the"
|
||
|
|
, "-- GNU General Public License for more details."
|
||
|
|
, "-- "
|
||
|
|
, "-- You should have received a copy of the GNU General Public License"
|
||
|
|
, "-- along with this program. If not, see <http://www.gnu.org/licenses/>."
|
||
|
|
, ""
|
||
|
|
, "-- File: haskell-quine.hs"
|
||
|
|
, "-- Author: Collin J. Doering <rekahsoft@gmail.com>"
|
||
|
|
, "-- Date: Apr 14, 2013"
|
||
|
|
, ""
|
||
|
|
, "import Data.List (intercalate)"]
|
||
|
|
|
||
|
|
dta = "main = putStrLn $ intercalate \"\\n\" header ++ \"\\n\\nheader = \" ++ \"[ \\\"\" ++ intercalate \"\\\"\\n , \\\"\" header ++ \"\\\"]\" ++ \"\\n\\ndta = \" ++ show dta ++ \"\\n\" ++ dta"
|
||
|
|
main = putStrLn $ intercalate "\n" header ++ "\n\nheader = " ++ "[ \"" ++ intercalate "\"\n , \"" header ++ "\"]" ++ "\n\ndta = " ++ show dta ++ "\n" ++ dta
|
||
|
|
```
|