Node.js fs.utimes() Method

Node.js hash.update() Method

Last Updated : 03 Apr, 2023

The hash.update( ) method is an inbuilt function of the crypto module’s Hash class. This is used to update the hash with given data. This method can be called multiple times to update the content of the hash as this method can take streaming data, such as file read stream.

This function takes data as an argument to generate the hash, this can be a string or file object. Along with the data, this also takes encoding type for the data, this can be utf-8, binary, or ASCII. If encoding is not provided and data is a string then utf-8 is used. desired output length in bytes.

Module Installation: Install the required module using the following command:

npm install crypto

Syntax:

hash.update(data [,Encoding])

Parameter: This function takes the following two parameters:

data: Data that needs to be added to the hash.
encoding: Encoding type for the data.

Return Value: This method returns an object with updated data.

Example 1:

Javascript

// Import crypto module
const crypto = require('crypto');
 
// Create Hash instance with createHash
const hash = crypto.createHash('sha256')
    // Use update to add data
    .update('I love GeeksForGeeks')
 
    // Use digest to get the hash value
    .digest('hex');
 
// Prints the hash value
console.log("Hash Value : " + hash);

Output:

Hash Value : 5a302d3c930d9e938c5326d7bb863afdc024b9ce77e30e99c4b82983350f8196

Example 2:

Javascript

// Import crypto module
const crypto = require('crypto');
 
// Create Hash instance with createHash
const hash = crypto.createHash('sha256')
    // Use update to add data
    .update('I love GeeksForGeeks')
 
    // Use update to add data
    .update('Because I love coding')
 
    // Use digest to get the hash value
    .digest('hex');
 
// Prints the hash value
console.log("Hash Value : " + hash);

Output:

Hash Value : e0789790d7da870830a679828c722f74f3840d4a6483f5babfb62c4d19884c9e

Reference: https://nodejs.org/api/crypto.html#crypto_hash_update_data_inputencoding

Node.js fs.utimes() Method

A

adityapande88

Improve

Article Tags :

Similar Reads

Node.js hmac.update() Method

The hmac.update() method is an inbuilt method of class HMAC within the crypto module which is used to update the data of hmac object. Syntax: hmac.update(data[, inputEncoding])Parameters: This method takes the following two parameters: data: It can be of string, Buffer, TypedArray, or DataView type.

Node.js cipher.update() Method

The cipher.update() method is an inbuilt application programming interface of class Cipher within crypto module which is used to update the cipher with data according to the given encoding format. Syntax: const cipher.update(data[, inputEncoding][, outputEncoding]) Parameters: This method takes the

Node.js decipher.update() Method

The decipher.update() method is an inbuilt application programming interface of class Decipher within crypto module which is used to update the decipher with the data according to the given encoding format. Syntax: const decipher.update(data[, inputEncoding][, outputEncoding]) Parameters: This metho

Node.js fs.utimes() Method

The fs.utimes() method is used to asynchronously change the modification and access timestamps of a file. The timestamps can be specified using a number, string, or Date object. An error would be thrown if the timestamp cannot be converted to a proper number, or is NaN, Infinity or -Infinity. Syntax

Node.js hash.copy() Method

The hash.copy( ) method is an inbuilt function of the crypto moduleâ€™s Hash class. This method is used to make a copy of the current state of the hash. This method can be called multiple times to create multiple copies of the hash. This method will throw an error if called after the digest method has

Node.js response.hasHeader() Method

The response.hasHeader() (Added in v7.7.0) property is an inbuilt property of the â€˜httpâ€™ module which returns true if the header identified by name is currently set in the outgoing headers. The header name matching is case-insensitive. The object returned by the response.getHeaders() method does not

Lodash _.update() Method

Lodash _.update() method accepts an updater to produce the value to set. This method uses _.updateWith() function to customize path creation. It is almost the same as the _.set() function. Syntax:_.update(object, path, updater);Parameters: object: This parameter holds the object to modify.path: This

Node.js fs.utimesSync() Method

The fs.utimesSync() method is used to synchronously change the modification and access timestamps of a file. The timestamps can be specified using a number, string, or Date object. An error would be thrown if the timestamp cannot be converted to a proper number, or is NaN, Infinity or -Infinity. Syn

Node.js hash.digest() Method

The hash.digest( ) method is an inbuilt function of the crypto module's Hash class. This is used to create the digest of the data which is passed when creating the hash. For example, when we create a hash we first create an instance of Hash using crypto.createHash() and then we update the hash conte

Node JS fs.writeFile() Method

â€‹In Node.js, the fs.writeFile() method is a built-in function used to asynchronously write data to a file. This method allows you to create a new file or overwrite an existing one with the specified content, without blocking the event loop, thus maintaining the non-blocking nature of Node.js applica