In this article, we'll be discussing Rxjs operators and how to use them in Angular. Rxjs is a library for reactive programming that allows you to work with asynchronous data streams.
Operators are higher-order functions that take one or more observable sequences as input and produce an output sequence.
There are many different types of operators, but some of the most common are map, filter, and reduce. Map operates on each element in an observable sequence and transforms it into a new element.
Filter lets you select which elements from an observable sequence you want to include in the output sequence.
Reduce takes all the elements in an observable sequence and combines them into a single value.
Operators are very powerful and can help you solve many different types of problems when working with asynchronous data streams.
Rxjs Operators are special type of functions that take input as an observable and then return an observable as an output that means Operators work with observable to make various kind of operations in angular or JavaScript.
there are around 110 operations in Rxjs where we can make various manipulation of collections e.g:
pipe() operator if is use to link operators together to make multiple functions into a single functions.
How to use Rxjs Operators
There are many operators in RxJS that can be used in Angular to perform different tasks. In this article, we will learn how to use some of the commonly used operators in Angular.
Operators are important in RxJS as they allow us to perform different operations on the data that we receive from the Observable.
We can use operators to filter the data, transform the data, and even perform mathematical operations on the data.
Some of the commonly used operators in Angular are: map(), filter(), reduce(), and flatMap(). These operators are used to perform different transformations on the data that we receive from an Observable.
Let's take a look at each of these operators in detail.
As we know Operators are special function which take input as argument and then emit final value as an Observable this means Operators are here to make changes in the stream so that we can fulfil the desired requirement. In an operation we can use multiple operators.
Example: How to make a sequence from 1 to 60 with time interval of 1 second.
Answer: If we have to emit an integer in a given time then we have interval operator which is used to emit numbers in sequence in a given timeframe.
Next we can use map operator to increase integer value every second so that we could have final output like we want.
It is unstoppable for now until we give a final number to end with. For that we can use take() operator where it can only take given amount of operations.
interval(1000)
.map(x => x + 1) // to start from 1 instead of 0
.map(x => console.log(x)) // do some logic here
.take(60)
.subscribe();Types of Operators in Rxjs
There are total 8 types of operators in rxjs, like timer() operator is a creation of numbers so it is considered to be in creation category of Rxjs. Similarly there are 7 other types of operators we have in rxjs
Summary
Rxjs operators are a set of functions that allow developers to manipulate data emitted by observables.
Operators can be used to filter, map, reduce, and flatMap data streams. In this article, we'll take a look at how to use operators in Angular applications.
Operators are an important part of RxJS, and they enable developers to work with observable data in a declarative way. Here you can find some commonly used operators in Rxjs.
In other words, operators allow developers to describe what they want to happen with an observable rather than write code that explicitly manipulates the data stream.
In this section , we focused on Rxjs Operators behavior , uses and how they work. so Using Rxjs Operator we can make our code structure more powerful and balanced because we have around 110 operator in rxjs where we can handle any kind of manipulation to our collections.
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