What Is the Difference Between Map,Filter,Reduce
What does map() filter() reduce() function do in js.
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1 Answer
Map:-Transforms each element in an array and returns a new array with the transformed elements.
Ex:- const numbers = [1, 2, 3, 4];
const doubled = numbers.map(num => num * 2);
console.log(doubled); // Outputs: [2, 4, 6,
8]
Filter:-Filters elements in an array based on a test (provided as a function) and returns a new array with elements that pass the test.
Ex:- const numbers = [1, 2, 3, 4];
const evens = numbers.filter(num => num % 2 === 0);
console.log(evens); // Outputs: [2,
4]
Reduce:- Reduces an array to a single value by applying a function that accumulates a result over all elements of the array.
Ex:- const numbers = [1, 2, 3, 4];
const sum = numbers.reduce((total, num) => total + num, 0);
console.log(sum); // Outputs:
10
