Programming Articles - Page 1120 of 3363

The util.types.isArgumentsObject() method checks whether the passed value is an arguments object or not. If the above condition is satisfied, it returns True, else False.Syntaxutil.types.isArgumentsObject( value )Parametersvalue − This input parameter takes input for the required parameter and checks if it's an arguments object or not.It returns True or False based upon the input value passed.Example 1Create a file with the name "isArgumentsObject.js" and copy the following code snippet. After creating the file, use the command "node isArgumentsObject.js" to run this code.// util.types.isArgumentsObject() Demo Example // Importing the util module const util = require('util'); // Passing the arguments object ... Read More

We can embed path variables into the URL and then use these path parameters to retrieve info from resources. These API endpoints have different values with respect to different values passed inside them.Example 1Create a file named "index.js" and copy the following code snippet. After creating the file, use the command "node index.js" to run this code.// Reading Path parameters in Node.js // Importing the below modules const express = require("express") const path = require('path') const app = express() var PORT = process.env.port || 3001 app.get('/p/:tagId', function(req, res) {    console.log("TagId received is : " + req.params.tagId); ... Read More

The v8.serializer.writeUint32() method is used for writing a raw 32-bit unsigned integer. This function is mainly used inside the custom serializer._writeHostObject().Syntaxv8.serializer.writeUint32(value)Parametersvalue − This parameter takes input for the 32-bit integer that will be written inside the internal buffer.The function does not return anything, instead it writes the passed value to the internal buffer.Example 1Create a file with the name "writeUint32.js" and copy the following code snippet. After creating the file, use the command "node writeUint32.js" to run this code.// v8.deserialize() Demo Example // Importing the v8 module const v8 = require('v8'); // Initializing the v8 Serializer object const serializer ... Read More

The util.types.isGeneratorObject() method checks whether the passed value is a built-in generator object or not. If the above condition is satisfied, it returns True, else False. The return value may differ from the original source code if a transpilation tool is used.Syntaxutil.types.isGeneratorObject(value)Parametersvalue − This input value takes input for the required parameter and checks if it's a Generator object or not.It returns True or False based upon the input value passed.Example 1Create a file "isGeneratorObject.js" and copy the following code snippet. After creating the file, use the command "node isGeneratorObject.js" to run this code.// util.types.isGeneratorObject() Demo Example // Importing the ... Read More

The util.types.isDataView() method checks whether the passed value is a built-in DataView instance or not. If the above condition is satisfied, it returns True, else False.Syntaxutil.types.isDataView(value)Parametersvalue − This input value takes input for the required parameter and checks if it's a Data View instance or not.It returns True or False based upon the input value passed.Example 1Create a file named "isDataView.js" and copy the following code snippet. After creating the file, use the command "node isDataView.js" to run this code.// util.types.isDataView() Demo Example // Importing the util module const util = require('util'); const buffer = new ArrayBuffer(20); // ... Read More

The util.types.isBigInt64Array() method checks whether the passed value is a BigInt64Array instance or not. If the above condition is satisfied, it returns True, else False.Syntaxutil.types.isBigInt64Array(value)Parametersvalue − This input value takes input for the required parameter and checks if it's a BigInt64 array instance or not.It returns True or False based upon the input value passed.Example 1Create a file named "isBigInt64Array.js" and copy the following code snippet. After creating the file, use the command "node isBigInt64Array.js" to run this code.// util.types.isBigInt64Array() Demo Example // Importing the util module const util = require('util'); // Functions to be passed as parameter // ... Read More

The util.isDeepStrictEqual() method as the name suggests, is used for checking whether the two values are deep strict equal or not. If both the values are deep strict equal, true is returned else it returns false.Syntaxutil.isDeepStrictEqual(val1, val2)Parametersval1 & val2 – Both the input parameters can accept class, function, object or a JavaScript primitive value. The above function checks the equality between these two values.Example 1Create a file with the name "deepStrictEqual.js" and copy the following code snippet. After creating the file, use the command "node deepStrictEqual.js" to run this code.// util.isDeepStrictEqual() Demo Example // Importing the util module const util = require('util'); ... Read More

The forEach() method in Node.js is used for iterating over a set of given array items. One can iterate over all the values of the array one-by-one using the forEach array loop.SyntaxarrayName.forEach(function)Parametersfunction − The function takes input for the method that will be executed.arrayName − Array that will be iterated.Example 1Create a file "forEach.js" and copy the following code snippet. After creating the file, use the command "node forEach.js" to run this code. Live Demo// forEach() Demo Example // Defining a vehicle array const vehicleArray = ['bike', 'car', 'bus']; // Iterating over the array and printing vehicleArray.forEach(element => {    console.log(element); ... Read More

The Hmac class is one of the many utility classes that is used for creating the cryptographic HMAC digests. The Hmac.update() method is used for updating the Hmac content with the data passed. If encoding is not provided and the data is in string format, then the default encoding 'utf8' is enforced.Syntaxhmac.update(data, [encoding])ParametersThe parameters are described below:data − This input parameter takes input for the data with which Hmac will be updated.encoding − This input parameter takes input for the encoding to be considered while updating the Hmac.Example 1Create a file with the name "hmacUpdate.js" and copy the following code snippet. After ... Read More

The util.deprecate() method wraps fn (that may be a function or class) in such a way that it is marketed as a deprecated method. The util.deprecate() method returns a function that emits a DeprecationWarning. This warning is printed to the stderr when the function is called the first time. The function is called without any warning once the warning is emitted.Syntaxutil.deprecate( fn, msg, [code] )ParametersThe parameters are defined below:fn − The function that needs to be deprecated.msg − This is a warning message which is invoked once the deprecated function is called.code − This is an optional parameter which displays the passed ... Read More