when

Summary

Returns fn(...x) if pred(...x) has returned logical true. Otherwise returns undefined.

Tip

This function is curried.

Examples

when(eq(40), add(2))(40);
//=> 42

when(eq(40), add(2))(41);
//=> undefined

Parameters

Name	Type	Description
pred	function	Predicate. Must return logical true.
fn	function	Function applied to the arguments if predicate is satisfied
x	?	One or more arguments

Return

?