feat(2018 day-12): initialize plant states

Author: developher-net

2018/day-12/plants.js

@@ -0,0 +1,21 @@
+class Plants {
+  constructor (initial) {
+    this.generations = []
+    this._setInitialGeneration(initial)
+  }
+
+  _setInitialGeneration (initial) {
+    this.generations.push(
+      initial.split('').map((plant, idx) => {
+        return {
+          position: idx,
+          state: plant
+        }
+      })
+    )
+  }
+}
+
+module.exports = {
+  Plants
+}

2018/day-12/plants.test.js

@@ -0,0 +1,46 @@
+/* eslint-env mocha */
+const expect = require('chai').expect
+const {
+  Plants
+} = require('./plants')
+
+const initialState = '#..#.#..##......###...###'
+
+describe('--- Day 12: Subterranean Sustainability ---', () => {
+  describe('Plants:', () => {
+    describe('new Plants()', () => {
+      it('creates a Plants object with the initial state', () => {
+        const expected = [
+          { position: 0, state: '#' },
+          { position: 1, state: '.' },
+          { position: 2, state: '.' },
+          { position: 3, state: '#' },
+          { position: 4, state: '.' },
+          { position: 5, state: '#' },
+          { position: 6, state: '.' },
+          { position: 7, state: '.' },
+          { position: 8, state: '#' },
+          { position: 9, state: '#' },
+          { position: 10, state: '.' },
+          { position: 11, state: '.' },
+          { position: 12, state: '.' },
+          { position: 13, state: '.' },
+          { position: 14, state: '.' },
+          { position: 15, state: '.' },
+          { position: 16, state: '#' },
+          { position: 17, state: '#' },
+          { position: 18, state: '#' },
+          { position: 19, state: '.' },
+          { position: 20, state: '.' },
+          { position: 21, state: '.' },
+          { position: 22, state: '#' },
+          { position: 23, state: '#' },
+          { position: 24, state: '#' }
+        ]
+        let plantTracker = new Plants(initialState)
+        const actual = plantTracker.generations[0]
+        expect(actual).to.deep.equal(expected)
+      })
+    })
+  })
+})

2018/day-12/solution.js

@@ -0,0 +1,11 @@
+// const {
+//   parseLine
+// } = require('./helpers')
+const {
+  Plants
+} = require('./plants')
+
+const initialState = '#..#.#..##......###...###'
+const plantTracker = new Plants(initialState)
+
+console.log(plantTracker.generations[0])