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Day 2 solved

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Joshua Seigler 2020-12-02 16:29:07 +00:00
parent 93aea4f013
commit 6eeaabc649
3 changed files with 1093 additions and 0 deletions
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solutions/day2/input.txt Normal file
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solutions/day2/solution.js Normal file
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const path = require('path')
const { read, position } = require('promise-path')
const fromHere = position(__dirname)
const report = (...messages) => console.log(`[${require(fromHere('../../package.json')).logName} / ${__dirname.split(path.sep).pop()}]`, ...messages)
function mapInput (line) {
const regex = /(?<num1>[0-9]+)-(?<num2>[0-9]+) (?<letter>[a-z]): (?<password>.+)$/
return line.match(regex).groups
}
function XOR (a, b) {
return a ? !b : !!b
}
async function run () {
const input = (await read(fromHere('input.txt'), 'utf8')).trim().split('\n').map(mapInput)
await solveForFirstStar(input)
await solveForSecondStar(input)
}
async function solveForFirstStar (input) {
const solution = input.filter(
({ num1, num2, letter, password }) => {
let count = 0
for (let i = 0; i < password.length; i++) {
if (password.charAt(i) === letter) {
count++
if (count > num2) {
return false
}
}
}
return count >= num1
}
).length
report('Input:', input)
report('Solution 1:', solution)
}
async function solveForSecondStar (input) {
const solution = input.filter(
({ num1, num2, letter, password }) => {
return XOR(password.charAt(num1 - 1) === letter, password.charAt(num2 - 1) === letter)
}
).length
report('Solution 2:', solution)
}
run()

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<!DOCTYPE html>
<html>
<head>
<title>Solution Viewer</title>
<style>
html, body { font-family: sans-serif; }
pre { border-radius: 0.5em; padding: 0.5em; background: #eee; }
</style>
<script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vue"></script>
</head>
<body>
<div id="viewer">
<h1>Solution Viewer ({{ solutionTitle }})</h1>
<p>For interesting problems; this page can be used as a dynamic viewer.</p>
<h3><a href="./input.txt">input.txt</a></h3>
<pre><code>{{ inputText }}</code></pre>
<h3><a href="./solution.js">solution.js</a></h3>
<pre><code>{{ solutionText }}</code></pre>
</div>
<script>
const app = new Vue({
el: '#viewer',
data: () => {
return {
solutionText: '[Loading]',
inputText: '[Loading]'
}
},
computed: {
solutionTitle() {
const parts = (document.location + '').split('/')
return parts.reverse()[1]
}
},
async mounted () {
this.solutionText = (await axios.get('./solution.js')).data
this.inputText = (await axios.get('./input.txt')).data
}
})
</script>
</body>
</html>