How do map, filter, and reduce work in different programming languages?

Can you explain how map, filter, and reduce work in JavaScript?

Sure! In JavaScript, map creates a new array by applying a function to each element, filter creates a new array with elements that pass a test, and reduce accumulates a value by executing a reducer function on each element.

What about in Python?

In Python, map applies a function to all items in an iterable, filter constructs an iterator from elements that return true, and reduce (from functools) applies a rolling computation to sequential pairs of values.

Are there similar functions in Ruby?

Yes! In Ruby, map is used to transform elements, select is similar to filter, and reduce (or inject) combines elements into a single value.

Can you give me an example of reduce in Java?

Certainly! In Java, you can use the Stream API's reduce method to combine elements. For example, list.stream().reduce(0, Integer::sum) sums up all integers in a list.