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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 articleWhy in busboy I am making use of stream for uploading files An example of file upload with busboy and express // accept POST request on...
Read articlePrior to the introduction of TypedArray, the JavaScript language had no mechanism for reading or manipulating streams of binary data. The Buffer class was introduced as...
Read articleA> To handle HTTP POST request in Express.js version 4 and above, you need to install middleware module called body-parser. body-parser extract the entire body portion...
Read articleHash algorithms are one way functions. They turn any amount of data into a fixed-length “fingerprint” that cannot be reversed. They also have the property that...
Read article1. app.use() takes only one callback whereas app.all() can take multiple callbacks. 2. ## app.use() only see whether url starts with specified path where app.all() will...
Read articleMiddleware refers to reusable components that can be plugged into an Express application. Middleware consists of functions that handle HTTP requests, such as the one we...
Read articleStreams are collections of data — just like arrays or strings. The difference is that streams might not be available all at once, and they don’t have to...
Read articleThese constraints, applied to the architecture, were originally communicated by Roy Fielding in his doctoral dissertation (see https://www.ics.uci.edu/~fielding/pubs/dissertation/rest_arch_style.htm) and defines the basis of RESTful-style. The six constraints...
Read articleNode is completely event-driven. Basically the server consists of one thread processing one event after another. A new request coming in is one kind of event....
Read articleSharding is a concept in MongoDB, which splits large data sets into small data sets across multiple MongoDB instances. Sometimes the data within MongoDB will be...
Read articleIn this next example, I am going to create two new schemas that will demonstrate how to create a relationship to another schema: author and book....
Read articlepopulate() is a way to populate referenced subdocuments in any schema. Lets take an example of a social network, one collection for users, and one for posts....
Read articleAn index in MongoDB is a special data structure that holds the data of few fields of documents on which the index is created. Indexes improve...
Read articleApplications that rely on third-party sources for data will at some point need to include things like OAuth tokens, SSH keys, or API credentials. This becomes...
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 articleThe Collection is group of Documents in MongoDB. In RDBMS, this can be considered as a table which will have list records (documents in MongoDB). What...
Read articleMongodb provides us with a very efficient way to store files directly in db rather than in file system. So basically what this means is, suppose...
Read articleWhen a user clicks a button or presses a key, an event is fired. These are called a click event or a keypress event, respectively. An...
Read articleHello and welcome to the world of little known optimization techniques. Reflow and repaint are important concepts that most developers are not exposed to. Put simply,...
Read articleAn Execution Context is created each time you run your .js file/app. The first step in this creation phase is Hoisting. The JS Engine reserves space...
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