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Mobile Phones/Cell Phones is the fundamental element in every moment or second in our life. But this most useable phone has some health effect that are...
Read articleProgramming languages are the foundation of software development and computer science. They provide a medium through which humans can instruct machines to perform specific tasks. Here’s...
Read articleAnd note some fundamentals of Promise – When you create a new Promise, you’re really just creating a plain old JavaScript object. This object can invoke...
Read articleThis tutorial teaches FIWARE users how to alter the context programmatically. The tutorial builds on the entities created in the previous stock management example and enables a user...
Read articleIn this file, you will write the functions that dispatch an action. These functions will be linked to your component props by the container’s mapDispatchToProps function....
Read articleA lifecycle hook that is called after Angular has fully initialized a component’s view. Define an ngAfterViewInit() method to handle any additional initialization tasks. interface AfterViewInit...
Read articleAggregation in MongoDB is nothing but an operation used to process the data that returns the computed results. Aggregation basically groups the data from multiple documents...
Read articleFiber, the new React reconciliation algorithm, has the ability to start and stop rendering as needed for performance benefits. One of the trade-offs of this is...
Read articleFirst a re-cap of the basic CSS Chain/Descendant Selector 1> Chain Selectors – https://stackoverflow.com/questions/13444647/css-class-definition-with-multiple-identifiers .class1.class2 will match only the elements that have both of the classes defined....
Read articleBasically, the Company asked to create an Android “screen” that would allow a user to enter and submit the following data from an American Express, Discover,...
Read articleAccording to original Documentation the pipable operator is that function take observables as a input and it returns another observable .previous observable stays unmodified. pipe(...fns: UnaryFunction<any,...
Read articleOne of the main goals of Angular is to help the developer create reusable and composable components. I think ng-content is one of the simplest ways...
Read articleThe TLDR answer is that encryption is two way and hashing is only one way. Both are methods to securely transfer data, but there is some...
Read articleEvent delegation makes use of two features of JavaScript events: event bubbling and the target element. When an event is triggered on an element, for example...
Read articlevar is function scoped and if you try to use a variable declared with var before the actual declaration, you’ll just get undefined. const and let...
Read articleWe know becaue of js data-types rules, Strings act like strings and numbers like numbers. But what happens when you need two different data types to...
Read articleWhen code is run in JavaScript, the environment in which it is executed is very important, and is evaluated as 1 of the following: Global code...
Read articleOne of the key differentiating attributes between primitive data types and compound data types is that the former are immutable. This means that you cannot change...
Read articleA closure is the combination of a function bundled together (enclosed) with references to its surrounding state (the lexical environment). In other words, a closure gives you...
Read articleFirst, NaN is not a keyword (unlike true, false, null, etc..), it is a property of the global object. The value of NaN is the same...
Read articleWhen you try to access a property on the new object, it checks the object’s own properties first. If it doesn’t find it there, it checks...
Read articleAn object can store data in one of two ways: as a property or as a variable. The method that you choose will have substantial ramifications...
Read articlethis refers to the object currently within the scope of the Person function. It sets it’s own property name as the value of the parameter passed into...
Read articleInstances inherit from classes (like a blueprint — a description of the class), and create sub-class relationships: hierarchical class taxonomies. Instances are typically instantiated via constructor functions with...
Read articleInstances inherit from classes (like a blueprint — a description of the class), and create sub-class relationships: hierarchical class taxonomies. Instances are typically instantiated via constructor functions with...
Read articleAs a side note – Redux need reducers to be “pure functions Basic example of mutations let state = { wardens: 900, animals: 800 }; This...
Read articleThe Document Object Model, or the “DOM”, is an interface to web pages. It is essentially an API to the page, allowing programs to read and...
Read articleDOCTYPE is an abbreviation for DOCument TYPE. A DOCTYPE is always associated to a DTD – for Document Type Definition. A DTD defines how documents of a certain type should be...
Read articleOne of the feature git, has enabled us to record all changes by the commit. And saved it as our history. So when something unexpected happens,...
Read articleCode executed by setTimeout() is called from an execution context separate from the function from which setTimeout was called. The usual rules for setting the this keyword for...
Read articleJavaScript has a single call stack in which it keeps track of what function we’re currently executing and what function is to be executed after that....
Read articleThe event loop’s job is to look at the stack and look at the task queue. If the stack is empty it takes the first thing...
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