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Articles by Mayank Agarwal
Page 11 of 31
Timing features in Node.js
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 MoreNode.js – util.inspect() method
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 MoreNode.js – util.inherits() Method
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 MoreNode.js – hmac.digest() Method
The Hmac class is one of the many utility classes that is used for creating the cryptographic HMAC digests. The Hmac.digest() method is used for calculating all the data that is updated using the Hmac.update() method. If encoding is provided, a string will be returned, else a buffer is returned.Syntaxhmac.digest( [encoding] )Parametersencoding − This input parameter takes input for the encoding to be considered while calculating hmac.Example 1Create a file "hmacDigest.js" and copy the following code snippet. After creating the file use, use the command "node hmacDigest.js" to run this code.// Hmac.digest() Demo Example // Importing the crypto module const ...
Read MoreHow to conditionally disable the input taking in VueJS?
For removing the disabled property, we can use the disabled tag available in VueJS. The disabled tag basically checks for the boolean value and decides if the input tag needs to be displayed or not. We set the value in app.js and dynamically change its value based on the toggle feature. To apply the :disabled, we will first create a div element with id ‘app’. Once the div element is created, we can apply the disabled property to the element by initializing the data content. Syntax Following is the syntax to disable the input taking in Vue.js − @click ...
Read MoreHow to check if a string is palindrome or not without filters in VueJs?
Filters basically provides the functionality to check inputs and then apply different type of formatting or transformations to the same. The filter property of a component is an object that accepts a value and return some other confirgured value as a response. In this article, we will not use filters and therefore directly apply the logic to check if a string is a palindrome or not. For a string to be palindrome the string should be equal to its reverse string. Therefore, we have to first reverse the string and then check the equality of that string with the original ...
Read MoreHow to categorize a year as a Leap or Non-Leap using Vue?
Vue can be defined as a progressive framework for building the user interfaces. It has multiple directives that can be used as per the user needs. The basic core library is mainly focused on building the view layer only and is also easy to pick up other libraries or integrate with them. In this article, we will use the Vue filters to check whether a string is a Leap year or not. A leap year has 366 days, whereas a non-Leap year has only 365 days. We can use logic to check whether a year is a Leap or not. ...
Read MoreHow to capitalize a String using VueJs filters?
Vue can be defined as a progressive framework for building the user interfaces. It has multiple directives that can be used as per the user needs. The basic core library is mainly focused on building the view layer only and it is also easy to pick up other libraries or integrate with them. In the below article, we will see how to capitalize a particular string. Capitalizing is basically a process where only the first character of a string is in capital letters and remaining all the characters are in lower case. We can capitalize a string by getting the ...
Read MoreHow to call a VueJS component method from outside the component ?
Generally, we cannot call a Vue component method from outside the component. But we have a way to call the component from outside. We can use the Vue’s ref Directive. This metthod allows a component to be referenced from the parent for direct access. To apply the ref Directive, we will first create a div element with id ‘app’. Once the div element is created, we can apply the ref to the element by initializing the its data. Syntax Following is the syntax to call a component method from outside the component in Vue.js − Here, the ...
Read MoreHow to call a function with Mouse hover in VueJS?
While hovering over a div or an element sometimes we require to display some information. This information or data is displayed while hovering over it with the mouse. Therefore, to display this data, we basically use the JS function @mouseover to display data. In the above specific case, we will make the mouseover function which will return data on hover. Please look at the below example for more clarification. Syntax Following is the syntax to call a function with mouse hover in Vue.js − mouseOver: function(){ this.active = !this.active; } Here mouseOver ...
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