commit 958abb797bc364dd7ce30ad02cd6d3742bf79143
parent 9983339ef40f385a54274bf728c7a302066f39a5
Author: finwo <finwo@pm.me>
Date: Fri, 2 Dec 2022 11:44:53 +0100
2022/02 solution
Diffstat:
| A | 2022/day-02/index.js | | | 88 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
1 file changed, 88 insertions(+), 0 deletions(-)
diff --git a/2022/day-02/index.js b/2022/day-02/index.js
@@ -0,0 +1,88 @@
+const fs = require('fs');
+const through = require('through2');
+const line_for_line = require('../common/line-for-line');
+
+// Fully expecting other operations later, otherwise would've just kept a single counter
+let score_1 = 0;
+let score_2 = 0;
+
+const choices = [
+ {
+ name : 'rock',
+ opp : 'A',
+ me : 'X',
+ points : 1,
+ map : 0,
+ Z : 6 + 2,
+ Y : 3 + 1,
+ X : 0 + 3,
+ },
+ {
+ name : 'paper',
+ opp : 'B',
+ me : 'Y',
+ points : 2,
+ map : 1,
+ Z : 6 + 3,
+ Y : 3 + 2,
+ X : 0 + 1,
+ },
+ {
+ name : 'scissors',
+ opp : 'C',
+ me : 'Z',
+ points : 3,
+ map : 2,
+ Z : 6 + 1,
+ Y : 3 + 3,
+ X : 0 + 2,
+ },
+];
+
+fs.createReadStream('input')
+ .pipe(line_for_line())
+
+ // Business logic
+ .pipe(through(function(line, enc, cb) {
+ line = line.toString();
+
+ const [c_them, c_me] = line.split(' ');
+ const them = choices.find(choice => choice.opp == c_them);
+ const me = choices.find(choice => choice.me == c_me );
+
+ // Step 1, run the match
+ const match = them.map - me.map;
+ let result = '';
+ switch(match) {
+ case -1:
+ case 2:
+ score_1 += 6 + me.points;
+ result = 'win';
+ break;
+ case 0:
+ score_1 += 3 + me.points;
+ result = 'draw';
+ break;
+ case 1:
+ case -2:
+ score_1 += 0 + me.points;
+ result = 'lose';
+ break;
+ default:
+ throw new Error(`other: ${match}`);
+ break;
+ }
+
+ // Step 2. chosen winner
+
+ score_2 += them[c_me];
+
+ console.log({ them, me, match, result });
+ cb();
+ }))
+
+ .on('finish', () => {
+ // done
+ console.log('Step 1:', score_1);
+ console.log('Step 2:', score_2);
+ })
