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alexaleluia12/asyn_callback.js

Last active June 18, 2018 18:47
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assync and callback
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asyn_callback.js
// promises https://developers.google.com/web/fundamentals/primers/promises
// source: http://2ality.com/2017/05/util-promisify.html
const {promisify} = require('util');
const fs = require('fs');
const readFileAsync = promisify(fs.readFile);
const filePath = process.argv[2];
async function main() {
try {
const text = await readFileAsync(filePath, {encoding: 'utf8'});
console.log('CONTENT:', text);
}
catch (err) {
console.log('ERROR:', err);
}
}
main();
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