Fix examples

Author: tshemsedinov

JavaScript/1-object.js

@@ -7,7 +7,7 @@ const p1 = {
     day: 26,
     month: 4,
     year: 121,
-  }
+  },
 };
 
 const date = `${p1.born.year}-${p1.born.month}-${p1.born.day}`;

JavaScript/3-file.dat

@@ -0,0 +1 @@
+�o"name"Marcus"city"Roma"borno"dayI4"monthI"yearI�
{{

JavaScript/4-hex.js

@@ -3,13 +3,15 @@
 const fs = require('node:fs');
 
 const v8File = './3-file.dat';
+
 fs.readFile(v8File, (err, data) => {
+  if (err) return void console.log(err);
   console.log(
     data
       .toString('hex')
       .toUpperCase()
       .split('')
-      .map((c, i) => ((i % 2 !== 0) ? (c + ' ') : c))
-      .join('')
+      .map((c, i) => (i % 2 !== 0 ? c + ' ' : c))
+      .join(''),
   );
 });