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Last week we looked into
HostListener decorators and how they could be used. In this week post we continue on our discovery of great decorators by looking at
ViewChildren. What the differences are, and when to use one or another.
Multi inheritance (MI) in Python is commonly used for mixins, where functionalities are defined in mixin classes and can be used as base classes. When those classes override the same functions, the program experiences what is known as the Diamond Problem. In order to call the proper functions, the compiler employs a Method Resolution Order (MRO) mechanism. In today’s post, we’ll look at the Diamond Problem, the MRO mechanism used by Python and we’ll also quickly look at why C# doesn’t have multi inheritance.
When creating directives, we sometime face situation where we need to change properties from the element or component hosting the directive. Those can changes can be made using
HostBindsing decorator. In today’s post we will look at how we can use
HostListener to change properties of the host element.
Angular has some nice directives hidden in the code that aren’t discussed in the guides. One of them is
NgTemplateOutlet which allows us to create inline reusable templates. In today’s post we will look at how we can use
NgTemplateOutlet to share functionalities in a HTML template.
Few weeks ago we looked into automating Postman collection run using Newman CLI. On top of using the CLI directly, Newman can also be used in a NodeJS application which makes it very versatile to create tools for testing. Today we will look at how we can use Newman as a NPM library and see the options provided.
Visual Studio Code is a free open source code editor. It comes packed with features and can also be extended with many extensions built by the community. Since its first launch five years ago, it has become the main editor to work on frontend projects like Angular or React projects. Because it is so quick and easy to use, we can get started straight away and build without having to explore much of its functionalities. But there are gems inside that if known, enhance drastically the productivity. In today’s post I will go through some file tips with Visual Studio Code version
1.44.2 which will boost productivity.
Structural directives in Angular, like
ngFor are mysterious directives. They both come with custom notation in order to define the content of the directives for example
*ngIf="abc else xyz" and
*ngFor="let x of xs; let i=index; trackBy: trackBy. In today’s post we will demystify the notation of
NgIf, called a microsyntax, by looking at how it can be used, and then reconstructing the directive ourselves.
Handlebars is a simple template engine which we can use to generate HTML content or other text format. Being very quick to use and understand makes it an ideal tool for projects needing the most common statements like conditions or loops. In today’s post we will look into Handlebars built in helpers with example.
The step of translating text to binary format, called character encoding, is an important part of software development. Nowadays, we have some reminiscence of the ASCII code but majority of the systems default to UTF-8. In today’s post we will be looking at what the ASCII, Unicode and UTF-8 are.
One of the concept which gained a lot of traction from the last five years is Event Sourcing. Event Sourcing changes the way data are handled, how data are stored, and how perception of the current state is constructed. In this post, we will explain what is Event Sourcing and will see how it can implement using
Equinox, a .NET implementation of an event store.
Few weeks ago we looked into the auto layout feature of Figma to create flexible layout which adapt to new elements placed into them and allow to automatically arrange elements while maintaining padding and alignment. Another great feature of Figma used to handle placement of elements within a frame is to use constraints. Constraints in Figma come in multiple format, in today’s post we will explore each one of them and understand how they are used.
Figma is a collaborative design tool that comes with a Free tier pricing for 3 projects and 2 editors. It comes with a full suite of features that allows us to create reusable designs and makes it easy to iterate on the designs. One of the features provided is the auto layout. In today’s post we will look into Figma auto layout feature and how it can be used to design components.
Kafka is a widely used message broker platform. Althought very powerful, developping and testing applications that consume or produce Kafka messages can be really painful. In today’s post we will look at kafkacat, a command line tool that will make our life easier when interacting with Kafka.
Cypress is a end to end frontend testing tool which simulates user navigation while running in browser. Few weeks ago we discovered the fundamentals of it, how we could install it and how we could create custom commands for it. The trick with testing is to find the right balance between not enough tests and too many tests. Not enough tests would yield less confidence in code changes while too many tests will yield more maintainance hassle. Therefore what we really want is to focus on specific aspects of our application that if properly tested will ensure that the quality remains. Today we will look at three of the main pillars, the routes, the posts and the displays.