const fs = require('fs');

/**
get file descriptor async
 */
fs.open('sample.txt', 'r', (error, fd) => {
    console.log(fd);
});

/**
get file descriptor sync
 */
const fd = fs.openSync('sample.txt', 'r');
console.log(fd);

/**
get file stat async
 */
fs.stat('sample.txt', (error, stat) => {
    if (error) {
        console.error(error);
    } else {
        console.log(stat);
    }
});

/**
get file stat sync
 */
const stat = fs.statSync('sample.txt');
console.log(stat);
console.log(stat.isDirectory());
console.log(stat.isSymbolicLink());
console.log(stat.size);