Filterarray

Filterarray is a programming concept used to create a new array containing only the elements from an original array that satisfy a specific condition. This is a common operation in many programming languages, often implemented as a built-in function or method. The process typically involves iterating through each element of the source array. For each element, a predefined test or predicate function is applied. If the element passes this test, it is included in the resulting filtered array. If it does not pass, it is excluded.

The primary purpose of filterarray is to selectively extract data based on criteria, making it easier to work with subsets of information without modifying the original array. This promotes immutability and can lead to more predictable code. For example, in a list of numbers, a filterarray operation could be used to create a new list containing only the even numbers, or only numbers greater than a certain value. Similarly, with an array of strings, filtering could extract words starting with a specific letter or strings of a particular length. The returned array is a distinct entity, separate from the original. This operation is fundamental to functional programming paradigms and is widely used in data manipulation and processing tasks.