Was this page helpful?

This page has no tags

334 views, 1 edit(s), 4144 characters(s) Page last modified 18:13, 15 Jan 2013 by contentconnector

How to add your knowledge

removeIf?()

Synopsis

Return a copy of the list, having removed all members for which the function fun returns True.

removeIf? ( fun As Name, _
            list As List ) As List

Argument	Type	Description
fun	Name	The name of the function to apply. The function must return a boolean.
list	List	The list of arguments to which the test function will be applied.

Removing empty sublists

Intent >removeIf(empty?, { {:a}, {:b}, {}, {:d} }) 
--> {{:a}, {:b}, {:d}}

In this example, all empty sublists are removed. In this case, this results in the removal of only the third item in the input list.

Using a custom function

Intent >removeIf(integer?, {:a, :c, "b", :c, 1.1, 3, :c, 3, 2, 1}) 
--> {:a, :c, "b", :c, 1.1, :c}

In this example, only non-integers were returned using the following custom function.

Function integer?(item as Any) as Boolean 
    integer? = (typeName(item) = :integer) 
End Function

Using a built-in system function with integer list elements

Intent >removeIf(:even?, {1, 2, 3, 4, 5, 6, 7, 8}) 
--> { 1, 3, 5, 7 }