37 lines
778 B
JavaScript
37 lines
778 B
JavaScript
import { readFileSync } from "fs";
|
|
|
|
const input = readFileSync("instructions.txt", "utf-8");
|
|
|
|
let display = "";
|
|
|
|
function drawCRT(cycle, pointer) {
|
|
if((cycle - 1) % 40 === 0) display += "\n"
|
|
|
|
if(Math.abs(((cycle - 1) % 40) - pointer) <= 1) display += "#";
|
|
else display += ".";
|
|
}
|
|
|
|
let xRegister = 1;
|
|
let cycle = 0;
|
|
|
|
input.split('\n').forEach(line => {
|
|
const instruction = line.split(' ');
|
|
|
|
switch(instruction[0]) {
|
|
case "noop":
|
|
cycle++;
|
|
drawCRT(cycle, xRegister);
|
|
break;
|
|
case "addx":
|
|
cycle++;
|
|
drawCRT(cycle, xRegister);
|
|
cycle++;
|
|
drawCRT(cycle, xRegister);
|
|
xRegister += parseInt(instruction[1]);
|
|
break;
|
|
}
|
|
|
|
|
|
});
|
|
|
|
console.log(display) |