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JavaScript Data Structures: Arrays

Learn JavaScript Data Structures: Arrays

An Array is a special data type in JavaScript used to describe lists and collections.

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Knowledge Check

Take this customized & interactive quiz to test your knowledge on JavaScript Data Structures: Arrays, then check out the learning resources below.

Question 1 of 6

Which of the following is NOT a valid way to create an Array?

  • var arr = new Array(1, 2, 3)
  • var arr = [1, 2, 3]
  • var arr = (1, 2, 3)

Core Learning

The fastest way to learn JavaScript Data Structures: Arrays is simply to study these exact resources. Focus on the 👀 to learn extra quickly and save time!

How to create an Array

👀 1 Thing to Focus On

  • Arrays are a special data type used in JavaScript. There are multiple ways to create one. You should be familiar with all of them.

How to access an Array

👀 1 Thing to Focus On

  • You should focus on learning how to access an array, but feel free to read the rest of the article

How to delete elements from an Array
Useful operations: `concat()`
Useful Operations: `find()`
Useful Operations: `.map()`
Useful Operations: `reduce()`
Useful Operations: `.push()`
Useful Operations: `length`
Mutability in JavaScript (SkillMagic Potion)


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