Discussion on more than 10 important JavaScript methods….!!

🢚🢚🢚Some JavaScript Math Methods🢘🢘🢘

Math.abs(): Basically, The Math. abs() function returns the absolute value of a number. This method returns a positive result to any negative or positive number but returns 0 in the case of 0.

function number(x, y) { return Math.abs(x — y)};
console.log(number(1, 5));
// expected output: 4
console.log(number(5, 3));
// expected output: 2
console.log(number(0, 3));
// expected output:3

Math.ceil(): Math ceil () function is to convert a number to an integer number. But In the case of a decimal number, he takes his next number as an integer number.

console.log(Math.ceil(.55));
// expected output: 1
console.log(Math.ceil(9));
// expected output: 9
console.log(Math.ceil(2.001));
// expected output: 3

Math.floor(): Math floor() function is to convert a number to an integer number. But In the case of a decimal number, he takes his previous number as an integer number.

console.log(Math.floor(9.95));
// expected output: 9
console.log(Math.floor(9.001));
// expected output: 9
console.log(Math.floor(9));
// expected output: 5

Math.max(): Math floor() function is used to get the max number from a few numbers.

console.log(Math.max(0, 1, 5, 2, 9));
// expected output: 9
console.log(Math.max(-8, -1, -6, -2));
// expected output: -1

Math.min(): The Math min() function is used to get the min number from a few numbers.

console.log(Math.min(2, 3, 4, 5));
// expected output: 2
console.log(Math.min(-2, -3, -4, -5));
// expected output: -5

🢚🢚🢚Some JavaScript Array Methods🢘🢘🢘

concat(): Multiple arrays are merged using the concat() method and it returns a new array.

const arr1 = [1,2,3,4,5];
const arr2 = [5,6,7,8,9,10];
const arr3 = arr1.concat(arr2);
console.log(arr3);
// expected output: Array [1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 10]

filter(): A new array is created according to the specified length using the filter () method.

const fruits = [‘Bananas’, ‘Apples’, ‘Dates’, ‘Cantaloupe’, ‘Cherries’];
const result = fruits.filter(fruit => fruit.length > 6);
console.log(result);
// expected output: Array [“Bananas”, “Cantaloupe”, “Cherries”]

find(): From the collection of array the find() method returns the value of the first element.

const array1 = [2, 5, 11, 12, 8, 55, 130, 44];
const found = array1.find(element => element > 50);
console.log(found);
// expected output: 55

indexOf(): The indexOf () method is used to understand the number of strings or numbers in an index in an array collection. If a string or number is more than one, then the next index number of that index must be included.If there is no index mentioned in the array then it will be -1. Examples are given..

const numbers = [1,2,3,4,5,2,3,1];
console.log(numbers.indexOf(2));
// expected output: 1
// start from index 2
console.log(numbers.indexOf(2, 2));
// expected output: 5
console.log(numbers.indexOf(9));
// expected output: -1

map(): The map () method can call each element and create a new array collection by creating a function. Examples are given..

const array = [11, 21, 31, 41, 51];
const map = array.map(x => x — 1);
console.log(map);
// expected output: Array [10, 20, 30, 40, 50]

pop(): This method is used to remove the last element from an array collection.

const numbers = [1,2,3,4,5,6,7,8,9,10,11];
numbers.pop();
console.log(numbers);
// expected output: Array [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

push(): The push () method is used to add the last new element to an array collection.

const numbers = [1,2,3,4,5,6,7,8,9];
const addNew = numbers.push(10);
console.log(numbers);
// expected output: Array [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

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