Programming Articles - Page 1124 of 3363

The Hash class is one of the many utility classes that is used for creating the hash digests of data. The hash.copy() method creates a new Hash object that will contain a deep copy of the internal state of the current hash object.Syntaxhash.copy([options])Parametersoptions −This input parameter takes input to control the stream behaviour and therefore will contain the stream.tranformOptions.Example 1Create a file "hashCopy.js" and copy the following code snippet. After creating the file, use the command "node hashCopy.js" to run this code.// hash.update() demo Example // Importing the crypto module const crypto = require('crypto'); // Defining the hash ... Read More

The util.inherits() method basically inherits the methods from one construct to another. This prototype will be set to a new object to that from the superConstructor.By doing this, we can mainly add some validations to the top of Object.setPrototypeOf(constructor.prototype, superConstructor.prototype).Syntaxutil.inherits(constructor, superConstructor)ParametersThe parameters are described below -constructor − This is a function type input that holds the prototype for constructor the user wants to be inherited.superConstructor − This is the function that will be used for adding and validating the input validations.Example 1Create a file "inherits.js" and copy the following code snippet. After creating the file, use the command "node inherits.js" to run ... Read More

The util.inspect() method returns the string representation of the objects that are intended for the debugging process.Syntaxutil.inspect(object, [showHidden], [depth], [colors])ParametersThe parameters are defined as below:object − A JavaScript primitive type or an object is given as input.optionsshowHidden − This is set as false by default. If true, this option includes the non-enumerable symbols and properties that are included in the formatted result. WeakMap and WeakSet are also included.depth − It specifies the number of recursions to be applied while formatting objects.colors − The output is set styled with ANSI color codes if this value is set to true. Colors passed are customizable.customInspect − The ... Read More

The timer module in Node.js consists of different functions that can control and alter the timings of code execution. In this article, we will see how to use some of these functions.setTimeout() MethodThe setTimeout() method schedules the code execution after a designated amount of milliseconds. Only after the timeout has occurred, the code will be executed. The specified function will be executed only once. This method returns an ID that can be used in clearTimeout() method.SyntaxsetTimeout(function, delay, [args])ParametersThe parameters are defined below:function − This parameter takes input for the function that will be executed.delay − This is the time duration after which ... Read More

The util.types.isInt32Array() method checks whether the passed value is a built-in Int32Array instance or not. If the above condition is satisfied, it returns True, else False.Syntaxutil.types.isInt32Array(value)Parametersvalue − This input takes input for the required parameter and checks if it's an Int32Array instance or not. Returns True or False based upon the input value passed.Example 1Create a file with name isInt32Array.js and copy the below code snippet.After creating the file, use the following command to run this code and check the output -node isInt32Array.jsProgram Code// util.types.isInt32Array() Demo Example // Importing the util module const util = require('util'); // Passing normal ... Read More

A variety of undergraduate and graduate programs are available at Indiana University's Kelley School of Business, which is located in the university's business college. These programs include debt financing, accounting, marketing, and management. According to the U.S. News and World Report, it is consistently ranked among the top 25 business schools in the country.Key Points BrieflyEstablished in 1920, the Kelley School of Business is a private institution of higher learning. It has locations on the Indiana University Bloomington and Indianapolis campuses, as well as in Indianapolis. 2Additionally, in addition to the full-time MBA, students can pursue an online MBA or ... Read More

To convert a correlation matrix into a logical matrix based on correlation coefficient in R, we can follow the below steps −First of all, create a matrix.Then, find the correlation matrix.After that, convert the correlation matrix into logical matrix based on coefficient value using greater than or less than sign.Example 1Let’s create a matrix as shown below − Live DemoM1

To find confidence interval for binomial distribution in R, we can use binom.confint function of binom package. This will result in confidence intervals based on many different methods. Check out the below examples to understand how it can be done.Example 1Loading Binom package and finding 95% confidence interval for a binomial distribution with sample of size 20 in which 5 outcomes are favourable −library(binom) binom.confint(5, 20, conf.level=0.95)Output      method    x n    mean       lower     upper 1 agresti-coull 5 20 0.2500000 0.10808718 0.4724754 2 asymptotic    5 20 0.2500000 0.06022730 0.4397727 3 bayes   ... Read More

To find the table of mean of a numerical column based on two factors in R data frame, we can follow the below steps −First of all, create a data frame with two factor and one numerical column.Then, find the table of mean of numerical column based on factor columns using tapply function.Example1Let’s create a data frame as shown below − Live DemoGroup1

To align the text horizontally in a bar plot created by using ggplot2 in R, we can follow the below steps −First of all, create a data frame.Then, create the bar plot using ggplot2 with text displayed on each bar.After that, create the same bar plot with text aligned horizontally.Create the data frameLet’s create a data frame as shown below − Live DemoCategory