Difference between Map & Filter Functions | JavaScript Tutorials in Hindi | Interview Question #7

In JavaScript, both map and filter are higher-order functions that operate on arrays. The main difference between them is the way they transform the original array. The map function creates a new array by applying a transformation function to each element of the original array. The transformation function can modify the element in any way and the resulting array will have the same length as the original array.

On the other hand, the filter function creates a new array by selecting elements from the original array that meet a certain condition specified in the filtering function. The filtering function returns a Boolean value for each element and the resulting array may have a different length than the original array depending on how many elements meet the condition. Map transforms all elements, while filter selects elements based on a condition.