Array Iteration and Manipulation in JavaScript


 arr.push(1, 2, 3);
 arr.pop();
 arr.shift();
 arr.unshift(1, 2, 3);


 Nested arrays and accessing/modifying
array data

 Access nested array elements with
multiple indexes
 Modify nested array elements by
assigning new values
 Examples:
 let arr = [[1, 2], [3, 4]];
 console.log(arr[0][0]); // 1
 arr[0][0] = 5;
 console.log(arr); // [[5, 2], [3,
4]]
 Destructuring assignment with arrays

 Assign variables from array elements
with a destructuring syntax
 Examples:
 let arr = [1, 2, 3];
 let [x, y, z] = arr;
 console.log(x); // 1
 console.log(y); // 2
 console.log(z); // 3
 Conditional operators (ternary) in
JavaScript

 Use the ternary operator to create
concise conditional statements