To understand Async and Await, first we need to understand about 'Task'. Task - This is used create thread but it will create thread from the thread pool and not from the computer operating system unlike normal Thread object in c# does. This is used to perform async operations 1. Task<TResult> - This return is used when the async method that returns a value. 2. Task - This return type is used when the async method does not return any value. 3. void - This return type is used for an event handler. We saw that concurrency refers to, in one way or another, doing several things at the same time. That concept of concurrency encompasses parallel programming and asynchronous programming. Parallel programming refers to the use of multiple threads simultaneously to solve a set of tasks. For this, we need processors with adequate abilities to perform several tasks at the same time. In general, we use parallel programming to gain speed. Asynchronous programming refers to the e...
Functions - It can be written in three ways in JavaScript. we developers always think of writing it in old ways which is called as 'Function Declaration way' ex : -It can be also written in variable assignment way. This is called 'Function expression' ex: The main difference between a function expression and a function declaration is the function name, which can be omitted in function expressions to create anonymous functions. Function expressions in JavaScript are not hoisted, unlike function declarations. You can't use function expressions before you create them: - Naming functions is useful if they need to reference themselves (e.g. for recursive calls). Indeed, if you are passing a literal function expression as an argument directly to another function, that function express...
Before getting into Dependency injection, we need to understand about IOC and DIP. Both IOC and DIP are principles or you can think it as rules that are set to achieve loosely coupled design between two classes. These two classes can be thought of as class A called as "PARENT" and class B called as "CHILD". It can be thought of as two project or two software components. These two classes should not depend of each other. I mean to say "PARENT" class should not depend on "CHILD" class to achieve something. Here depend means : inside "PARENT" class we should not create the object of "CHILD" class. Ex: Here in the above image you can see the "PARENT" class is creating "CHILD" class object to achieve something. Hence we can say that "PARENT" class is "DEPENDENT" on "CHILD" class or we can also that "CHILD" class is a dependency class of "PARENT" class. So to make...
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