advent-of-code

commit c839f6de1619258ebeffd960290afd4cbf10de4c
parent 47b7fe31661ae1a6be1ed86a54b539484994e8f5
Author: finwo <finwo@pm.me>
Date:   Mon,  5 Dec 2022 09:24:55 +0100

2022/05 solution

Diffstat:
A
2022/day-05/index.js
 | 
56
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
2022/day-05/stacks
 | 
8
++++++++

2 files changed, 64 insertions(+), 0 deletions(-)
diff --git a/2022/day-05/index.js b/2022/day-05/index.js
@@ -0,0 +1,56 @@
+const fs            = require('fs');
+const through       = require('through2');
+const line_for_line = require('../common/line-for-line');
+
+function rotate(matrix) {
+  const out = [];
+  for(let x=0; x<matrix.length; x++) {
+    for(let y=0; y<matrix[x].length; y++) {
+      const k   = matrix.length - 1 - x;
+      out[y]    = out[y] || [];
+      out[y][k] = matrix[x][y];
+    }
+  }
+  return out;
+}
+
+const stacks = rotate(
+  fs
+    .readFileSync('stacks', 'utf-8')
+    .split('\n')
+    .map(row => row.split(''))
+)
+  .map(row => row.filter(x => x.replace(' ', '')));
+
+fs.createReadStream('input')
+  .pipe(line_for_line())
+
+  // Business logic
+  .pipe(through(function(line, enc, cb) {
+    line = line.toString();
+
+    const [,amount,,src,,dst] = line.split(' ').map(x => parseInt(x));
+
+    let tmp = [];
+    for(let i=0; i<amount; i++) {
+      console.log({dst});
+      tmp.push(stacks[src-1].pop());
+    }
+    // stacks[dst-1].push(...tmp);
+    stacks[dst-1].push(...(tmp.reverse()));
+
+
+    console.log({line, amount, src, dst});
+
+    cb();
+  }))
+
+  .on('finish', () => {
+    // done
+    let tops = '';
+    for(let i=0; i<stacks.length; i++) {
+      tops+=stacks[i][stacks[i].length-1];
+    }
+
+    console.log({stacks, tops});
+  });
diff --git a/2022/day-05/stacks b/2022/day-05/stacks
@@ -0,0 +1,8 @@
+  J  B T 
+  ML QLR 
+  GQ WSBL
+D DT MGVP
+T NNNDJGN
+WHHSCNRWD
+NPPWHHBNG
+LCWCPTMZW