Filtered

Description

filtered is a function that returns a list of items that match a given condition.

Syntax

filtered(list subject, function callback)

• subject is the list to be filtered.
• callback is a function that returns a boolean value. The function is called for each item in the list. If the function returns true, the item is added to the result list. If the function returns false, the item is not added to the result list.

Remarks

• The callback function must have one or two parameters and must return a boolean value.
• If the callback function has one parameter, the parameter is the current item in the list.
• If the callback function has two parameters, the first parameter is the current item in the list and the second parameter is the index of the current item in the list.

Examples

filtered([1, 2, 3, 4, 5], (number item) {
    return item % 2 == 0
}) // returns [2, 4]

filtered([1, 2, 3, 4, 5], (number item, number index) {
    return index % 2 == 0
}) // returns [1, 3, 5]