Improve and rename tasks

tshemsedinov · tshemsedinov · commit 1a13a6272fad · 2024-07-18T16:42:31.000+03:00
diff --git a/JavaScript/Tasks/1-promisify-problem.js b/JavaScript/Tasks/1-promisify-problem.js
@@ -1,7 +1,7 @@
 'use strict';
 
-// Task: implement cancel using AbortController,
-// AbortSignal, or passing `timeout` as an option
+// Task: implement cancel passing `timeout` as an option
+// to promisified function (last argiment instead of callback)
 
 const promisify = (fn) => (...args) => {
   const promise = new Promise((resolve, reject) => {
diff --git a/JavaScript/Tasks/2-abort-problem.js b/JavaScript/Tasks/2-abort-problem.js
@@ -0,0 +1,29 @@
+'use strict';
+
+// Task: implement cancel passing `AbortSignal` as an option
+// to promisified function (last argiment instead of callback)
+// Hint: create `AbortController` or `AbortSignal` in usage section
+
+const promisify = (fn) => (...args) => {
+  const promise = new Promise((resolve, reject) => {
+    const callback = (err, data) => {
+      if (err) reject(err);
+      else resolve(data);
+    };
+    fn(...args, callback);
+  });
+  return promise;
+};
+
+// Usage
+
+const fs = require('node:fs');
+const read = promisify(fs.readFile);
+
+const main = async () => {
+  const fileName = '1-promisify.js';
+  const data = await read(fileName, 'utf8');
+  console.log(`File "${fileName}" size: ${data.length}`);
+};
+
+main();
diff --git a/JavaScript/Tasks/2-multi-iterate.js b/JavaScript/Tasks/2-multi-iterate.js
