Array Methods Part 3

Here are a few more useful array methods:

1. concat(): Combines two or more arrays and returns a new array, without modifying the original arrays.

let arr1 = [1, 2];
let arr2 = [3, 4];
let combined = arr1.concat(arr2);
console.log(combined); // Output: [1, 2, 3, 4]

2. join(separator): Joins all elements of an array into a string, separated by the specified separator (optional).

let fruits = ["apple", "banana", "orange"];
let joined = fruits.join(", ");
console.log(joined); // Output: "apple, banana, orange"

3. slice(start, end): Extracts a section of an array and returns a new array. The start index is inclusive, and the end index is exclusive.

let numbers = [1, 2, 3, 4, 5];
let sliced = numbers.slice(1, 4);
console.log(sliced); // Output: [2, 3, 4]

4. splice(start, deleteCount, item1, item2, ...): Changes the contents of an array by removing, replacing, or adding elements. It modifies the original array and returns an array containing the deleted elements (if any).

let numbers = [1, 2, 3, 4, 5];
let removed = numbers.splice(2, 2, 6, 7);
console.log(numbers); // Output: [1, 2, 6, 7, 5]
console.log(removed); // Output: [3, 4]

5. split(separator, limit): Splits a string into an array of substrings based on the specified separator. The original string is not modified. The optional limit parameter sets the maximum number of elements in the returned array, and the rest of the string is left out.

let text = "apple,banana,orange";
let result = text.split(",");
console.log(result); 
// Output: ["apple", "banana", "orange"]

let limited = text.split(",", 2);
console.log(limited);
// Output: ["apple", "banana"]