add an uncurried version of Function.apply for better perf.

jbgi · jbgi · commit 435109241022 · 2016-06-19T16:20:45.000+02:00
diff --git a/core/src/main/java/fj/Function.java b/core/src/main/java/fj/Function.java
@@ -718,7 +718,18 @@ public static <A, B, C> F<C, B> bind(final F<C, A> ma, final F<A, F<C, B>> f) {
    * @return A new function after applying the given higher-order function to the given function.
    */
   public static <A, B, C> F<C, B> apply(final F<C, F<A, B>> cab, final F<C, A> ca) {
-    return bind(cab, f -> compose(f, ca));
+    return apply(uncurryF2(cab), ca);
+  }
+
+  /**
+   * Performs function application within a higher-order function (applicative functor pattern).
+   *
+   * @param cab The higher-order function to apply a function to.
+   * @param ca  A function to apply within a higher-order function.
+   * @return A new function after applying the given higher-order function to the given function.
+   */
+  public static <A, B, C> F<C, B> apply(final F2<C, A, B> cab, final F<C, A> ca) {
+    return c -> cab.f(c, ca.f(c));
   }
 
   /**
