Created
September 26, 2016 05:00
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Pixels Camp Challenge #2 - Remove oom
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var c = (program) => { | |
var register = undefined; | |
var memory = [0]; | |
var memory_pointer = 0; | |
var instruction_pointer = 0; | |
var find_matching = (start, stop, direction) => { | |
var level = 1; | |
instruction_pointer += direction; | |
while(level) { | |
instruction_pointer += direction; | |
if (instructions[instruction_pointer] == start) level++; | |
if (instructions[instruction_pointer] == stop) level--; | |
} | |
}; | |
var commands = { | |
moo: () => { | |
find_matching('moo', 'MOO', -1); | |
instruction_pointer--; | |
}, | |
mOo: () => { | |
memory_pointer && memory_pointer--; | |
}, | |
moO: () => { | |
memory_pointer++; | |
memory[memory_pointer] = memory[memory_pointer] || 0; | |
}, | |
mOO: () => { | |
var index = memory[memory_pointer]; | |
if (index != 3) { | |
commands[tokens[index]](); | |
} else { | |
instructions = []; | |
} | |
}, | |
Moo: () => { | |
if (memory[memory_pointer] == 0) { | |
memory[memory_pointer] = input_char(); | |
} else { | |
output_char(String.fromCharCode(memory[memory_pointer])); | |
} | |
}, | |
MOo: () => { | |
memory[memory_pointer]--; | |
}, | |
MoO: () => { | |
memory[memory_pointer]++; | |
}, | |
MOO: () => { | |
if (memory[memory_pointer] === 0) { | |
find_matching('MOO', 'moo', 1); | |
} | |
}, | |
OOO: () => { | |
memory[memory_pointer] = 0; | |
}, | |
MMM: () => { | |
if (register) { | |
register = memory[memory_pointer]; | |
} else { | |
memory[memory_pointer] = register; | |
register = undefined; | |
} | |
}, | |
OOM: () => { | |
Array.from(memory[memory_pointer]+'').map(output_char); | |
} | |
}; | |
var tokens = Object.keys(commands); | |
var instructions = program.match(new RegExp(tokens.join('|'), 'g')); | |
while (instructions[instruction_pointer]) { | |
commands[instructions[instruction_pointer]](); | |
instruction_pointer++; | |
} | |
}; |
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