exercice

 Réécrire ce code avec async

On modifiera la lig.2 par const readline = require('readline').promises;

1. const fs = require('fs');
2. const readline = require('readline');
3. const { stdin: input, stdout: output } = require('process');
4. 
   
5. const rl = readline.createInterface({ input, output });
6. 
   
7. rl.question('give some file names? ', (f) => {
8. 
   
9.   const filenames = f.split(" ");
10.   let counts = filenames.map(f => {
11.     try {
12.       const data = fs.readFileSync(f, { encoding: 'utf8' });
13.       return `${f}: ${data.split('\n').length} lines`;
14.     } catch (err) {
15.       return `${f}: couldn't read file`;
16.     }
17.   });
18.   console.log(counts.join('\n'));
19. 
    
20. 
    
21.   rl.close();
22. });