Created
December 3, 2012 07:13
-
-
Save bfriesen/4193301 to your computer and use it in GitHub Desktop.
My solution to David Poeschl's (@dpoeschl) twitter code golf challenge
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // Make this C# code compile with minimal additional code (no commenting, etc.): Foo(0)(1)("two")("three")(4)(5)("six")("seven")(8)(9)("ten!"); | |
| // https://twitter.com/dpoeschl/status/275464052216573952 | |
| // How much more code to enforce the argument type pattern (i.e. int, int, string string, int, int, string, string...)? | |
| // https://twitter.com/dpoeschl/status/275477464183103488 | |
| // https://twitter.com/dpoeschl/status/275478110290444288 | |
| // https://twitter.com/brianfriesen/status/275479513490669568 | |
| delegate WhatTheFunc<T2,T3,T4,T1> WhatTheFunc<T1,T2,T3,T4>(T1 _); | |
| void CreateFoo() | |
| { | |
| WhatTheFunc<int, int, string, string> Foo = null; // The first function needs to start out null because we have a cycle of functions. | |
| WhatTheFunc<string, int, int, string> c = _ => Foo; // If it wasn't initially declared and assigned, we wouldn't be able to compile, | |
| WhatTheFunc<string, string, int, int> b = _ => c; // since the second functon refers to the first (and the third to the second, etc). | |
| WhatTheFunc<int, string, string, int> a = _ => b; // It is only after the rest of the cycle has been declared and assigned, that we can | |
| Foo = _ => a; // assign the first function its real value (which is to return the fourth function). | |
| // Compiles and runs | |
| Foo(0)(1)("two")("three")(4)(5)("six")("seven")(8)(9)("ten!"); | |
| // None of these compile (they have the wrong pattern of argument types) | |
| // Foo("0")(1)("two")("three")(4)(5)("six")("seven")(8)(9)("ten!"); | |
| // Foo(0)("1")("two")("three")(4)(5)("six")("seven")(8)(9)("ten!"); | |
| // Foo(0)(1)(2)("three")(4)(5)("six")("seven")(8)(9)("ten!"); | |
| // Foo(0)(1)("two")(3)(4)(5)("six")("seven")(8)(9)("ten!"); | |
| // Foo(0)(1)("two")("three")("4")(5)("six")("seven")(8)(9)("ten!"); | |
| // Foo(0)(1)("two")("three")(4)("5")("six")("seven")(8)(9)("ten!"); | |
| // Foo(0)(1)("two")("three")(4)(5)(6)("seven")(8)(9)("ten!"); | |
| // Foo(0)(1)("two")("three")(4)(5)("six")(7)(8)(9)("ten!"); | |
| // Foo(0)(1)("two")("three")(4)(5)("six")("seven")("8")(9)("ten!"); | |
| // Foo(0)(1)("two")("three")(4)(5)("six")("seven")(8)("9")("ten!"); | |
| // Foo(0)(1)("two")("three")(4)(5)("six")("seven")(8)(9)(10); | |
| } | |
| // Golf Version - 249 characters, including 62 characters from original problem: | |
| delegate R<U,V,W,T> R<T,U,V,W>(T _);void F(){R<int,int,string,string> Foo=null;R<string,int,int,string> c=_=>Foo;R<string,string,int,int> b=_=>c;R<int,string,string,int> a=_=>b;Foo=_=>a;Foo(0)(1)("two")("three")(4)(5)("six")("seven")(8)(9)("ten!");} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment