Package tech.v3.datatype

Class Pred

  • public class Pred
extends java.lang.Object
    Short form common scalar predicates for use in filtering operations. tech.v3.datatype.UnaryPredicate derives from clojure.lang.IFn, java.util.DoublePredicate, and defines a set of primitive comparison interfaces allowing efficient non-boxing comparison operations. On the other hand some of the primitives, such as 'eq', are stronger in that they show correct behavior w/r/t Double/NaN. For ordering functions the argument is passed on the lefthand side so Pred.lt(5.0) creates the function `arg < 5.0` where arg is the argument to the function.

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static tech.v3.datatype.UnaryPredicate eq​(java.lang.Object constant)
      `constant == arg`.
      static tech.v3.datatype.UnaryPredicate gt​(java.lang.Object constant)
      `arg > constant`
      static tech.v3.datatype.UnaryPredicate gte​(java.lang.Object constant)
      `arg >= constant`
      static tech.v3.datatype.UnaryPredicate lt​(java.lang.Object constant)
      `arg < constant`
      static tech.v3.datatype.UnaryPredicate lte​(java.lang.Object constant)
      `arg <= constant`
      static tech.v3.datatype.UnaryPredicate nil​(java.lang.Object constant)
      `constant == null`
      static tech.v3.datatype.UnaryPredicate notEq​(java.lang.Object constant)
      `constant != arg`.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Method Detail

      • eq

        public static tech.v3.datatype.UnaryPredicate eq​(java.lang.Object constant)
        `constant == arg`. Works for Double/NaN.

      • notEq

        public static tech.v3.datatype.UnaryPredicate notEq​(java.lang.Object constant)
        `constant != arg`. Works for Double/NaN.

      • gt

        public static tech.v3.datatype.UnaryPredicate gt​(java.lang.Object constant)
        `arg > constant`

      • lt

        public static tech.v3.datatype.UnaryPredicate lt​(java.lang.Object constant)
        `arg < constant`

      • gte

        public static tech.v3.datatype.UnaryPredicate gte​(java.lang.Object constant)
        `arg >= constant`

      • lte

        public static tech.v3.datatype.UnaryPredicate lte​(java.lang.Object constant)
        `arg <= constant`

      • nil

        public static tech.v3.datatype.UnaryPredicate nil​(java.lang.Object constant)
        `constant == null`