day-1-part-1.js

const position = { x: 0, y: 0 }

// left up right down
const Dir = [ [0, 3, 1, {x: -1, y: 0}], [1, 0, 2, {x: 0, y: 1}], [2, 1, 3, {x: 1, y: 0}], [3, 2, 0, {x: 0, y: -1}]]

let currentDirectionIndex = 1

function move(input) {
    const dir = input[0]
    const steps = input.substr(1)
    currentDirectionIndex = Dir.find(direction => Dir[currentDirectionIndex][dir === 'L' ? 1 : 2] === direction[0])[0]
    let currentDirection = Dir[currentDirectionIndex]
    position.x += currentDirection[3].x * steps
    position.y += currentDirection[3].y * steps
}

const inputString = "L5, R1, L5, L1, R5, R1, R1, L4, L1, L3, R2, R4, L4, L1, L1, R2, R4, R3, L1, R4, L4, L5, L4, R4, L5, R1, R5, L2, R1, R3, L2, L4, L4, R1, L192, R5, R1, R4, L5, L4, R5, L1, L1, R48, R5, R5, L2, R4, R4, R1, R3, L1, L4, L5, R1, L4, L2, L5, R5, L2, R74, R4, L1, R188, R5, L4, L2, R5, R2, L4, R4, R3, R3, R2, R1, L3, L2, L5, L5, L2, L1, R1, R5, R4, L3, R5, L1, L3, R4, L1, L3, L2, R1, R3, R2, R5, L3, L1, L1, R5, L4, L5, R5, R2, L5, R2, L1, L5, L3, L5, L5, L1, R1, L4, L3, L1, R2, R5, L1, L3, R4, R5, L4, L1, R5, L1, R5, R5, R5, R2, R1, R2, L5, L5, L5, R4, L5, L4, L4, R5, L2, R1, R5, L1, L5, R4, L3, R4, L2, R3, R3, R3, L2, L2, L2, L1, L4, R3, L4, L2, R2, R5, L1, R2"

const commands = inputString.split(", ")

for (const command of commands)
    move(command)

console.log("Distance: " + (Math.abs(position.x) + Math.abs(position.y)))