Programming Articles - Page 1118 of 3363

The Hash class is one of the many utility classes that is used for creating the hash digests of data. The hash.update() method updates the hash content with the data passed, and the encoding that is passed along with the parameters. If the encoding is not passed and the data is a string, ‘utf8’ encoding is used.Syntaxhash.update(data, [inputEncoding])ParametersThe parameters are described below −data − This input parameter takes input for the data that will update the hash content.InputEncoding − Encoding to encode the input data or the data stringExample 1Create a file with the name "hashUpdate.js" and copy the following ... Read More

The util.types.isNativeError() method checks whether the passed value is a built-in error type or not. If the above condition is satisfied, it returns True, else False. The error can be of any type.Syntaxutil.types.isNativeError(value)ParametersIt takes a single parameter −value − This input value takes input for the required parameter and checks if it's an error type or not.It returns True or False based upon the input value passed.Example 1Create a file with the name "isNativeError.js" and copy the following code snippet. After creating the file, use the command "node isNativeError.js" to run this code.// util.types.isNativeError() Demo Example // Importing the ... Read More

The Hash class is one of the many utility classes that is used for creating the hash digests of data. The hash.digest() method calculates all the data that needs to be hashed passed inside the hash function and returns them. If an encoding is defined, a string will be returned, else a buffer is returned.Syntaxhash.digest([encoding])ParametersIt takes a single parameter −encoding − This input parameter takes input for the encoding to be applied while calculating the hash.Example 1Create a file with the name "hashDigest.js" and copy the following code snippet. After creating the file, use the command "node hashDigest.js" to run ... Read More

The util.types.isInt8Array() method checks whether the passed value is a built-in Int8Array instance or not. If the above condition is satisfied, it returns True, else False.Syntaxutil.types.isInt8Array(value)ParametersIt takes a single parameter −value − This input value takes input for the required parameter and checks if it's an Int8Array instance or not.It returns True or False based upon the input value passed.Example 1Create a file with the name "isInt8Array.js" and copy the following code snippet. After creating the file, use the command "node isInt8Array.js" to run this code.// util.types.isInt8Array() Demo Example // Importing the util module const util = require('util'); ... Read More

The util.types.isAnyArrayBuffer() checks whether the passed value is an ArrayBuffer or a SharedArrayBuffer instance. It returns True if the above condition holds, else False.Syntaxutil.types.isAnyArrayBuffer(value)ParametersIt takes a single parameter −value − This input parameter takes input for the required datatype and checks if it's an ArrayBuffer or SharedArrayBuffer instance.It returns True or False based upon the input value passed.Example 1Create a file with the name "isArrayBuffer.js" and copy the following code snippet. After creating the file, use the command "node isArrayBuffer.js" to run this code// util.types.isAnyArrayBuffer() Demo Example // Importing the util module const util = require('util'); // Printing ... Read More

The util.types.isFloat32Array() method checks whether the passed value is a builtin Float32Array instance or not. If the above condition is satisfied, it returns True, else False.Syntaxutil.types.isFloat32Array(value)ParametersIt takes a single parameter −value − This input value takes input for the required parameter and checks if it's a Float32-Array instance or not.It returns True or False based upon the input value passed.Example 1Create a file with the name – "isFloat32Array.js" and copy the following code snippet. After creating the file, use the command "node isFloat32Array.js" to run this code.// util.types.isFloat32Array() Demo Example // Importing the util module const util = require('util'); ... Read More

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

The util.getSystemErrorName() method is used for returning the string name of the numeric error code that is returned from the Node.js API. There is a mapping between the error codes and error names which is platform-dependent.Syntaxutil.getSystemErrorName(err)ParametersIt takes a single parameter −err −This parameter takes input as a numeric value that will specify the error number or the error code.The function returns the error name based upon the error code or error number passed in the err parameter.Some common system errors are - EACCES, EEXIST, EISDIR, ENOENT, ENOTDIR, ENOTEMPTY, etc. Browse this page to find the complete information about system error ... Read More

The util.types.isFloat64Array() method checks whether the passed value is a builtin Float64Array instance or not. It returns True if the above condition holds, else False.Syntaxutil.types.isFloat64Array(value)ParametersIt takes only one parameter −value − This input value takes input for the required parameter and checks if it is a Float64Array instance or not.It returns True or false based upon the input value passed.Example 1Create a file with the name "isFloat64Array.js" and copy the following code snippet. After creating the file, use the command "node isFloat64Array.js" to run this code.// util.types.isFloat64Array() Demo Example // Importing the util & assert module const util = ... Read More

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