56 lines
1.5 KiB
JavaScript
56 lines
1.5 KiB
JavaScript
import fs from 'node:fs'
|
|
|
|
function init(filename) {
|
|
const data = fs.readFileSync(filename, { encoding: 'utf-8' }, data => data)
|
|
const desertmap = new DesertMap(
|
|
data.split('\n\n')[0].split(''),
|
|
data.split('\n\n')[1]
|
|
)
|
|
desertmap.navigate()
|
|
}
|
|
|
|
|
|
class DesertMap {
|
|
instructions = []
|
|
map = ""
|
|
#iterator
|
|
#route = []
|
|
#way = null
|
|
constructor(instructions, map) {
|
|
|
|
this.instructions = instructions
|
|
this.map = map
|
|
this.#route = []
|
|
this.#iterator = 0
|
|
this.steps = 0
|
|
this.#way = null
|
|
}
|
|
setup() {
|
|
const matches = [...this.map.matchAll(/(\w+) = \((\w+), (\w+)\)/gm)]
|
|
matches.forEach(match => {
|
|
this.#route.push({ goal: match[1], L: match[2], R: match[3] })
|
|
})
|
|
}
|
|
run(towards) {
|
|
if (!this.steps) {
|
|
return this.#route.find(route => route.goal === 'AAA')[towards]
|
|
}
|
|
return this.#route.find(route => route.goal === this.#way)[towards]
|
|
}
|
|
navigate() {
|
|
this.setup()
|
|
//console.log(this.#route)
|
|
|
|
while (this.#iterator < this.instructions.length | true) {
|
|
this.#way = this.run(this.instructions[this.#iterator])
|
|
this.steps += 1
|
|
console.log(this.#iterator, this.#way, this.steps)
|
|
if (this.#way === 'ZZZ') { return false }
|
|
this.#iterator = this.instructions.length - this.#iterator === 1 ? 0 : this.#iterator + 1
|
|
}
|
|
console.log(this.steps)
|
|
|
|
}
|
|
}
|
|
|
|
init('input.txt') |