#Predicate Combinator + Chains
Implements Predicate combinator operators (as described here), as well as predicate chain filtering.
##Predicates
###Usage
val even = Predicate[Int](x => x % 2 == 0)
val divisible_by_5 = Predicate[Int](x => x % 5 == 0)
List.range(1,11).filter(even and divisible_by_5) should be (List(10))
###Function literal implicit conversion
import Predicate.Implicits.predicateConverter
val even = (x:Int) => x % 2 == 0
val divisible_by_5 = (x:Int) => x % 5 == 0
List.range(1,11).filter(even and divisible_by_5) should be (List(10))
##Predicate Chains
###Usage
val chain = PredicateChain(even, divisibleBy5)
chain.length should be (2)
or...
val chain = even ~> divisibleBy5
chain.length should be (2)
###Implicit conversion of Traversible[A]
Automagically adds filter(PredicateChain[A]):Traversible[A] on any Traversible[A].
import PredicateChain.Implicits.convertToChainFilterable
val chain = even ~> divisibleBy5
List(3,4,5,2,10).filter(chain) should be (List(4,2,10))
###The "Kitchen Sink" example
Uses both implicit conversions, plus the fancy ~> operator (yes, I'm going to Scala abuse hell).
import PredicateChain.Implicits.convertToChainFilterable
import Predicate.Implicits.predicateConverter
List(3,4,5,2,10)
.filter(
((x:Int) => x % 2 == 0) ~>
((y:Int) => y % 5 == 0)) should be (List(4,2,10))