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FREECODECAMP

basic data structures

Copy an Array with the Spread Operator
Use an Array to Store a Collection of Data
Remove Items Using splice()
Create complex multi-dimensional arrays
Access Property Names with Bracket Notation
Add Key-Value Pairs to JavaScript Objects
Remove Items from an Array with pop() and shift()
Modify an Object Nested Within an Object
Check if an Object has a Property
Add Items Using splice()
Generate an Array of All Object Keys with Object.keys()
Modify an Array Stored in an Object
Iterate Through All an Array's Items Using For Loops
Access an Array's Contents Using Bracket Notation
Add Items to an Array with push() and unshift()
Use the delete Keyword to Remove Object Properties
Combine Arrays with the Spread Operator
Copy Array Items Using slice()
Check For The Presence of an Element With indexOf()
Iterate Through the Keys of an Object with a for...in Statement