by Sai gowtham

Getting the first n elements from a array in Swift

Learn, how to get the first n elements from an array in swift.

Consider, we have a following array:

var arr = [10, 20, 30, 40, 50, 60, 70]

To access the first n elements from an above array, we can use the prefix() method by passing the required number of elements as an argument to it.

Here is an example, that gets the first 3 elements of an array.

var arr = [10, 20, 30, 40, 50, 60, 70]

let firstThree  = arr.prefix(3)

print(firstThree)

Output:

[10, 20, 30]

Similarly, we can also use the Array subscript syntax [ ] like this.

var arr = [10, 20, 30, 40, 50, 60, 70]

let firstThree  = arr[...3]

print(firstThree)

Css Tutorials & Demos

How rotate an image continuously in CSS

In this demo, we are going to learn about how to rotate an image continuously using the css animations.

How to create a Instagram login Page

In this demo, i will show you how to create a instagram login page using html and css.

How to create a pulse animation in CSS

In this demo, i will show you how to create a pulse animation using css.

Creating a snowfall animation using css and JavaScript

In this demo, i will show you how to create a snow fall animation using css and JavaScript.

Top Udemy Courses

JavaScript - The Complete Guide 2021 (Beginner + Advanced)
JavaScript - The Complete Guide 2021 (Beginner + Advanced)
64,026 students enrolled
52 hours of video content
View Course
React - The Complete Guide (incl Hooks, React Router, Redux)
React - The Complete Guide (incl Hooks, React Router, Redux)
284,472 students enrolled
40 hours of video content
View Course
Vue - The Complete Guide (w/ Router, Vuex, Composition API)
Vue - The Complete Guide (w/ Router, Vuex, Composition API)
152,857 students enrolled
48.5 hours of video content
View Course