feature(2018 day-12): day 12 part 1 solution

Author: developher-net

2018/day-12/helpers.js

@@ -1,4 +1,19 @@
 const { listToProps } = require('../day-10/helpers')
+const fs = require('fs')
+const path = require('path')
+const filePath = path.join(__dirname, 'input.txt')
+const { linesToArray } = require('../inputParser')
+
+const loadInput = (callback) => {
+  fs.readFile(filePath, { encoding: 'utf8' }, (err, data) => {
+    if (err) throw err
+
+    const list = linesToArray(data).map(parseLine)
+    if (typeof callback === 'function') {
+      callback(list)
+    }
+  })
+}
 
 /**
  * Parses a line from the input into structured data
@@ -10,5 +25,6 @@ const parseLine = (input) => {
 }
 
 module.exports = {
+  loadInput,
   parseLine
 }

2018/day-12/input.txt

@@ -0,0 +1,14 @@
+...## => #
+..#.. => #
+.#... => #
+.#.#. => #
+.#.## => #
+.##.. => #
+.#### => #
+#.#.# => #
+#.### => #
+##.#. => #
+##.## => #
+###.. => #
+###.# => #
+####. => #

2018/day-12/solution.js

@@ -1,27 +1,28 @@
 const {
-  parseLine
+  loadInput
 } = require('./helpers')
 const {
   Plants
 } = require('./plants')
 
-const initialState = '#..#.#..##......###...###'
-const rules = `...## => #
-..#.. => #
-.#... => #
-.#.#. => #
-.#.## => #
-.##.. => #
-.#### => #
-#.#.# => #
-#.### => #
-##.#. => #
-##.## => #
-###.. => #
-###.# => #
-####. => #`.split('\n').map(parseLine)
-const plantTracker = new Plants(initialState, rules)
-for (let gen = 1; gen <= 20; gen++) {
-  plantTracker.advance()
+// Initial state from my puzzle input
+const initialState = '#...#...##..####..##.####.#...#...#.#.#.#......##....#....######.####.##..#..#..##.##..##....#######'
+
+const init = (data) => {
+  const rules = data
+  const plantTracker = new Plants(initialState, rules)
+  for (let gen = 1; gen <= 20; gen++) {
+    plantTracker.advance()
+  }
+  console.log('Generating 20 generations from the input looks like this:')
+  plantTracker.display()
+  const answer = plantTracker.getCheckSum(20)
+  const answer2 = ''
+
+  console.log(`-- Part 1 --`)
+  console.log(`Answer: ${answer}`)
+  console.log(`-- Part 2 --`)
+  console.log(`Answer: ${answer2}`)
 }
-plantTracker.display()
+
+loadInput(init)