02_advanced/uebungen/u12_mehrere-dateien-auslesen/index.js

@@ -0,0 +1,29 @@
+// const fs = require('node:fs'); // commonjs
+import fs from 'node:fs'; // esm - module Schreibweise
+
+const getFileBy = (path, encoding = 'utf-8') => {
+  return new Promise((resolve, reject) => {
+    // async process
+    fs.readFile(path, encoding, (error, data) => {
+      if (error) {
+        reject(error);
+      }
+      resolve(data);
+    });
+  });
+};
+
+Promise.all([
+  getFileBy('data/file01.txt'),
+  getFileBy('data/file02.txt'),
+  getFileBy('data/file03.txt'),
+  getFileBy('data/file04.txt'),
+  getFileBy('data/file05.txt'),
+  getFileBy('data/file06.txt'),
+])
+  .then((data) => {
+    console.log(data);
+  })
+  .catch((err) => {
+    console.log(err);
+  });