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Node.js Articles
Page 13 of 22
Node.js – util.types.isArrayBufferView() Method
The util.types.isArrayBufferView() checks whether the passed value is an instance of the ArrayBuffer views, or typed array objects like DataView. This method returns True if the above conditions are satisfied, else it returns False.Syntaxutil.types.isArrayBufferView(value)ParametersIt takes only one parameter −value − This input parameter takes input for the required datatype and checks if it is an ArrayBuffer or a typed array objectIt returns True or False based upon the input value passed.Example 1Create a file with the name "isArrayBufferView.js" and copy the following code snippet. After creating the file, use the command "node isArrayBufferView.js" to run this code.// util.types.isArrayBufferView() Demo Example ...
Read MoreNode.js – util.types.isAsyncFunction() Method
The util.types.isAsyncFunction() checks whether the passed value is an async function or not. If the above condition holds, it returns True, else False.Syntaxutil.types.isAsyncFunction(value)ParametersIt takes only one parameter −value − This input value takes input for the required parameter and checks if it is an async function or not.It returns True or False based upon the input value passed.Example 1Create a file with the name "isAsyncFunction.js" and copy the following code snippet. After creating the file, use the command "node isAsyncFunction.js" to run this code.// util.types.isArgumentsObject() Demo Example // Importing the util module const util = require('util'); // Passing ...
Read MoreNode.js – Retrieving file character encoding
A computer system works upon bits. In the same way, a computer reads files into binary representation which is why we need to convert text characters into binary data. Most popular character encoding types types are: ASCII and Unicode. Unicode has two further types: utf8 and utf16.SyntaxdetectCharacterEncoding(filePath)Setting Up the Environment and Execution:Step I − Initialize the node project.npm initStep II − Install the required modules.npm install detect-character-encodingStep III − Pass the text file name whose encoding is required.Example 1Create a file "abc.txt" with the following text: "Welcome to Tutorials Point" and save it in the project directory.Create a file with the name ...
Read MoreNode.js – util.types.isGeneratorFunction() Method
The util.types.isGeneratorFunction() method checks whether the passed value is a generator function or not. If the above condition holds, it returns True, else False. The return value may differ from the original source code if a transpilation tool is used.Syntaxutil.types.isGeneratorFunction(value)Parametersvalue − This input value takes input for the required parameter and checks if it's a Generator function or not.It returns True or False based upon the input value passed.Example 1Create a file with the name "isGeneratorFunction.js" and copy the following code snippet. After creating the file, use the command "node isGeneratorFunction.js" to run this code.// util.types.isGeneratorFunction() Demo Example // Importing ...
Read MoreNode.js – util.types.isUint8ClampedArray() Method
The util.types.isUint8ClampedArray() method checks whether the passed value is a built-in Uint8ClampedArray instance or not. If the above condition is satisfied, it returns True, else False.Syntaxutil.types.isUint8ClampedArray(value)Parametersvalue − This input value takes input for the required parameter and checks if it's a Uint8ClampedArray instance or not.It returns True or False based upon the input value passed.Example 1Create a file with the name "isUint8ClampedArray.js" and copy the following code snippet. After creating the file, use the command "node isUint8ClampedArray.js" to run this code.// util.types.isUint8ClampedArray() Demo Example // Importing the util module const util = require('util'); // Passing normal Int8-Array as input ...
Read MoreNode.js – util.formatWithOptions() method
The util.formatWithOptions() method works in the same way as the util.format() method. The only difference between the two is that the formatWithOptions() method takes an inspectOptions argument that specifies options that are passed along the util.inspect() method.Syntaxutil.formatWithOptions(inspectOptions, format, [args])ParametersThe parameters are defined below:inspectOptions − These options will be used to inspect the object passed along this method.format − This parameter takes input for the format type of the input value passed.Example 1Create a file with the name "formatWithOptions.js" and copy the following code snippet. After creating the file, use the command "node formatWithOptions.js" to run this code.// Node.js util.formatWithOptions() method ...
Read MoreNode.js – util.types.isArgumentsObject() Method
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 MoreNode.js – Reading Path Parameters from URL
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 MoreNode.js – util.types.isGeneratorObject() Method
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 MoreNode.js – util.types.isDataView() Method
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); // ...
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