advent-of-code

commit 07d0e5ca5f8a19672cbec9c028d1351f540d03cc
parent 4c9bdcf38343377bccb21899cc5460fea5c37b34
Author: finwo <finwo@pm.me>
Date:   Wed,  8 Dec 2021 17:39:51 +0100

Moved re-used fns from day-01 to common

Diffstat:
A
src/common/index.ts
 | 
2
++
A
src/common/line-by-line.ts
 | 
12
++++++++++++
A
src/common/sum.ts
 | 
3
+++
M
src/day-01/puzzle-01.ts
 | 
15
++-------------
M
src/day-01/puzzle-02.ts
 | 
18
++----------------

5 files changed, 21 insertions(+), 29 deletions(-)
diff --git a/src/common/index.ts b/src/common/index.ts
@@ -0,0 +1,2 @@
+export * from './line-by-line';
+export * from './sum';
diff --git a/src/common/line-by-line.ts b/src/common/line-by-line.ts
@@ -0,0 +1,12 @@
+import readline from 'readline';
+import fs       from 'fs';
+import events   from 'events';
+
+export function lineByLine(filename: string, cb: ()=>{}): Promise<void> {
+  const rl = readline.createInterface({
+    input  : fs.createReadStream(filename),
+    output : null,
+  });
+  rl.on('line', cb);
+  return events.once(rl, 'close');
+}
diff --git a/src/common/sum.ts b/src/common/sum.ts
@@ -0,0 +1,3 @@
+export function sum(...n: number[]): number {
+  return n.reduce((r,a)=>r+a, 0);
+}
diff --git a/src/day-01/puzzle-01.ts b/src/day-01/puzzle-01.ts
@@ -1,7 +1,4 @@
-import readline      from 'readline';
-import fs            from 'fs';
-import events        from 'events';
-
+import { lineByLine } from '../common';
 
 let lastDepth      = null;
 let increasedTotal = 0;
@@ -14,12 +11,7 @@ let texts = [
 
 (async () => {
 
-  const rl = readline.createInterface({
-    input  : fs.createReadStream(__dirname + '/input-01'),
-    output : null,
-  });
-
-  rl.on('line', line => {
+  await lineByLine(__dirname + '/input-01', line => {
     if ((!line) || isNaN(line)) return;
 
     const depth = parseInt(line);
@@ -35,13 +27,10 @@ let texts = [
     lastDepth = depth;
   });
 
-  await events.once(rl, 'close');
-
   process.stdout.write('\n\n');
   process.stdout.write('---[ REPORT ]---\n');
   process.stdout.write(`Increased ${increasedTotal} times\n`);
   process.stdout.write('\n');
 
-
 })();
 
diff --git a/src/day-01/puzzle-02.ts b/src/day-01/puzzle-02.ts
@@ -1,6 +1,4 @@
-import readline      from 'readline';
-import fs            from 'fs';
-import events        from 'events';
+import { lineByLine, sum } from '../common';
 
 let history        = [];
 let sumLast        = null;
@@ -12,18 +10,9 @@ let texts = [
   'increased',
 ];
 
-function sum(...n) {
-  return n.reduce((r,a)=>r+a, 0);
-}
-
 (async () => {
 
-  const rl = readline.createInterface({
-    input  : fs.createReadStream(__dirname + '/input-01'),
-    output : null,
-  });
-
-  rl.on('line', line => {
+  await lineByLine(__dirname + '/input-01', line => {
     if ((!line) || isNaN(line)) return;
     const depth = parseInt(line);
     history.push(depth);
@@ -46,13 +35,10 @@ function sum(...n) {
 
   });
 
-  await events.once(rl, 'close');
-
   process.stdout.write('\n\n');
   process.stdout.write('---[ REPORT ]---\n');
   process.stdout.write(`Increased ${increasedTotal} times\n`);
   process.stdout.write('\n');
 
-
 })();