feat(2020-day-10): find the voltage differences to solve for part 1

Author: developher-net

2020/day-10/input.txt

@@ -0,0 +1,93 @@
+47
+99
+115
+65
+10
+55
+19
+73
+80
+100
+71
+110
+64
+135
+49
+3
+1
+98
+132
+2
+38
+118
+66
+116
+104
+87
+79
+114
+40
+37
+44
+97
+4
+140
+60
+86
+56
+133
+7
+146
+85
+111
+134
+53
+121
+77
+117
+21
+12
+81
+145
+129
+107
+93
+22
+48
+11
+54
+92
+78
+67
+20
+138
+125
+57
+96
+26
+147
+124
+34
+74
+143
+13
+28
+126
+50
+29
+70
+39
+63
+41
+91
+32
+84
+144
+27
+139
+33
+88
+72
+23
+103
+16

2020/day-10/solution.js

@@ -1,12 +1,14 @@
+const { count } = require('console')
 const fs = require('fs')
 const path = require('path')
 const filePath = path.join(__dirname, 'input.txt')
 const { inputToArray } = require('../../2018/inputParser')
+const { countDifferences } = require('./jolts')
 
 fs.readFile(filePath, { encoding: 'utf8' }, (err, initData) => {
   if (err) throw err
 
-  initData = inputToArray(initData.trim())
+  initData = inputToArray(initData.trim()).map(Number)
 
   const resetInput = () => {
     // Deep copy to ensure we aren't mutating the original data
@@ -15,8 +17,8 @@ fs.readFile(filePath, { encoding: 'utf8' }, (err, initData) => {
 
   const part1 = () => {
     const data = resetInput()
-    console.debug(data)
-    return 'No answer yet'
+    const differences = countDifferences(data)
+    return differences[1] * differences[3]
   }
 
   const part2 = () => {