Getting Started
Overview
Random Challenge
Javascript Basics
Javascript Arrays
- Get nth element of array
- Remove first n elements of an array
- Get last n elements of an array
- Get first n elements of an array
- Return last n array elements
- Remove a specific array element
- Count number of elements in JavaScript array
- Count number of negative values in array
- Sort an array of numbers in descending order
- Sort an array of strings alphabetically
- Return the average of an array of numbers
- Return the longest string from an array of strings
- Check if all array elements are equal
- Merge an arbitrary number of arrays
- Sort array by object property
- Merge two arrays with duplicate values
- Sum up all array elements with values greater than
- Create a range of numbers
- Group array of strings by first letter
- Define an array with conditional elements
- Get every nth element of array
Javascript Objects
Javascript Dates
Javascript Sets
Javascript DOM
Challenge Rush
// Write a function that takes an array (a) as argument// Extract the last 3 elements of a// Return the resulting array function myFunction ( a ) { return }
return
myFunction([1,2,3,4])
[2,3,4]
myFunction([5,4,3,2,1,0])
[2,1,0]
myFunction([99,1,1])
[99,1,1]