Advent of Code 2019 Day 12

advent2019-12.1.js

const pos3d = { x: 0, y: 0, z: 0 }
const gravObject = { pos: { x: 0, y: 0, z: 0 }, vel: { x: 0, y: 0, z: 0 } };

const gravMachine = (data, cycles) => {
  let gravObjects = data.split(/[\r\n\<\>]+/).filter(i => i.length).map(i => {
    let retval = { pos: Object.assign({}, pos3d), vel: Object.assign({}, pos3d) };
    i.split(', ').map(ii => ii.split('=')).forEach(ii => retval.pos[ii[0]] = parseInt(ii[1]));
    return retval;
  });

  for (let x = 1; x <= cycles; x++) {
    gravObjects.forEach((proc, y) => {
      gravObjects.forEach((read, z) => {
        if (y === z) return;
        ['x', 'y', 'z'].forEach(l => {
          if (proc.pos[l] > read.pos[l]) proc.vel[l]--;
          else if (proc.pos[l] < read.pos[l]) proc.vel[l]++;
        });
      });
    });
    gravObjects.forEach(move => ['x', 'y', 'z'].forEach(l => move.pos[l] += move.vel[l]));
  }

  return {
    gravObjects,
    totalEnergy: gravObjects.reduce((r, i) =>
      r + Object.values(i).reduce((rr, ii) =>
        rr * Object.values(ii).reduce((rrr, iii) => rrr + Math.abs(iii), 0)
        , 1)
      , 0)
  };
}

[
  [`<x=-1, y=0, z=2>
<x=2, y=-10, z=-7>
<x=4, y=-8, z=8>
<x=3, y=5, z=-1>`, 10, 179],
  [`<x=-8, y=-10, z=0>
<x=5, y=5, z=10>
<x=2, y=-7, z=3>
<x=9, y=-8, z=-3>`, 100, 1940]
].forEach((i,x) => {
  console.assert(gravMachine(i[0], i[1]).totalEnergy === i[2], `Fail test #${x}`);
});

let bigData = `<x=-5, y=6, z=-11>
<x=-8, y=-4, z=-2>
<x=1, y=16, z=4>
<x=11, y=11, z=-4>`;
console.log(gravMachine(bigData, 1000));