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The challenge involves mathematics in some central way. Also consider using more specific tags, listed in the tag wiki info.
1
vote
Write a program that makes 2 + 2 = 5
Java
Using reflection:
import java.lang.reflect.Field;
public class TwoPlusTwoTest {
public static void main(String[] args) throws Exception {
Field field = String.class.getDeclaredField …
1
vote
Fibonacci-orial
JavaScript (ES6), 46 bytes
f=(n,a=1,b=1,c=i=1)=>n==i?c:f(n,b,a+b,c*b,++i)
Uses recursion and accumulator variables. Rounding errors start at f(16).
2
votes
Substring Sum Set
Erlang, 69 bytes
f(A)->put(1,1),L=lists,[L:sum(L:sublist(A,put(1,get(1)+1),X))||X<-A].
Erlang's higher-order functions for lists do not receive the index of the current element. This uses the process …