Eitherf*ck

Eitherf*ck is a Brainfuck variant in which code is executed in both directions, starting at the center of the code.

The idea for the language was posted by User:80.213.159.15 who didn’t leave any identification.

Commands: 0	Center of code (only to clarify) > 	Move the pointer to the right < 	Move the pointer to the left + 	Increment the memory cell under the pointer - 	Decrement the memory cell under the pointer . 	Output the character signified by the cell at the pointer , 	Input a character and store it in the cell at the pointer
 * 1) 	Does nothing(used only to make sure that the number of commands is an odd number)

However, these commands are reversed when they're on the left side of the code. This means that > will move the pointer to the left instead of to the right; that is, if it's on the left side. Same goes for the other commands; "+" becomes "-", "," becomes "." etc. when they're placed on the left side of the "0" sign.

The code is executed one by one character, in both directions; however, the right side always starts.

Brainfuck example: 1 2 3 4 5 6 7 8 + + + + + > > +

Eitherf*ck example: 8 6 4 2 0 1 3 5 7 - < - - 0 + + + >

An implementation of an Eitherf*ck interpreter written in Python can be found in this Github repo.