🍇Some important array methods

1. filter(): The filter() method creates a new array with all elements that pass the test implemented by the provided function. It takes a callback function as an argument, which is called for each element in the array. If the callback function returns true for an element, that element is included in the new array. Otherwise, it is excluded. Here's an example of using filter():

const numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

const evenNumbers = numbers.filter(number => number % 2 === 0);

console.log(evenNumbers); // Output: [2, 4, 6, 8, 10]

In this example, filter() is used to create a new array called evenNumbers that only includes even numbers from the numbers array.

2. find(): The find() method returns the value of the first element in the array that satisfies the provided testing function. It takes a callback function as an argument, which is called for each element in the array until the function returns true, at which point find() returns the value of that element. If the callback function never returns true, find() returns undefined. Here's an example of using find():

const numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

const firstEvenNumber = numbers.find(number => number % 2 === 0);

console.log(firstEvenNumber); // Output: 2

In this example, find() is used to find the first even number in the numbers array.

3 some(): The some() method tests whether at least one element in the array passes the test implemented by the provided function. It takes a callback function as an argument, which is called for each element in the array until the function returns true, at which point some() returns true. If the callback function never returns true, some() returns false. Here's an example of using some():

const numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

const hasEvenNumber = numbers.some(number => number % 2 === 0);

console.log(hasEvenNumber); // Output: true

In this example, some() is used to check whether the numbers array includes at least one even number.

4 every(): The every() method tests whether all elements in the array pass the test implemented by the provided function. It takes a callback function as an argument, which is called for each element in the array. If the callback function returns false for any element, every() returns false. If the callback function returns true for all elements, every() returns true. Here's an example of using every():

const numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

const allEvenNumbers = numbers.every(number => number % 2 === 0);

console.log(allEvenNumbers); // 2,5,6,8,10