AoC-2017-day8.js

const data = require("fs").readFileSync("day8-input.txt", "UTF-8");

map = {};
maxCPU = 0;
data.split("\n").forEach(row => {
  action = row.split(" if ")[0].split(" ");
  conditionStr = row.split(" if ")[1];
  conditionVar = conditionStr.split(" ")[0];
  actionVar = action[0];
  increment = action[1] === "inc";
  actionVal = parseInt(action[2]);

  !map.hasOwnProperty(actionVar) && (map[actionVar] = 0);
  !map.hasOwnProperty(conditionVar) && (map[conditionVar] = 0);

  condition = eval("map." + conditionStr);

  if (condition) {
    if (increment) {
      map[actionVar] += actionVal;
      if (map[actionVar] > maxCPU) {
        maxCPU = map[actionVar];
      }
    } else {
      map[actionVar] -= actionVal;
    }
  }
});

max = Math.max(...Object.values(map));

console.log("Part 1:", max);
console.log("Part 2:", maxCPU);