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30-seconds-of-code/snippets/hashNode.md
2018-02-04 20:46:30 +02:00

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### hashNode
Creates a hash for a value using the [SHA-256](https://en.wikipedia.org/wiki/SHA-2) algorithm. Returns a promise.
Use `crypto` API to create a hash for the given value.
```js
const crypto = require('crypto');
const hashNode = val =>
new Promise(resolve =>
setTimeout(
() =>
resolve(
crypto
.createHash('sha256')
.update(val)
.digest('hex')
),
0
)
);
```
```js
hashNode(JSON.stringify({ a: 'a', b: [1, 2, 3, 4], foo: { c: 'bar' } })).then(console.log); // '04aa106279f5977f59f9067fa9712afc4aedc6f5862a8defc34552d8c7206393'
```