52da0bbcac
It was something we forgot and that we don't want to forget. Sending it onto the event loop prevents us from blocking with a long operation, allowing other things on the event loop to happen before a take a possibly long time
732 B
732 B
hashNode
Creates a hash for a value using the SHA-256 algorithm. Returns a promise.
Use crypto API to create a hash for the given value, setTimeout to prevent blocking on a long operation, and a Promise to give it a familiar interface.
const crypto = require('crypto');
const hashNode = val =>
new Promise(resolve =>
setTimeout(
() =>
resolve(
crypto
.createHash('sha256')
.update(val)
.digest('hex')
),
0
)
);
hashNode(JSON.stringify({ a: 'a', b: [1, 2, 3, 4], foo: { c: 'bar' } })).then(console.log); // '04aa106279f5977f59f9067fa9712afc4aedc6f5862a8defc34552d8c7206393'