1 files changed, 76 insertions, 0 deletions
diff --git a/base/src/main/java/bjc/utils/funcutils/FuncUtils.java b/base/src/main/java/bjc/utils/funcutils/FuncUtils.java
new file mode 100644
index 0000000..9950add
--- /dev/null
+++ b/base/src/main/java/bjc/utils/funcutils/FuncUtils.java
@@ -0,0 +1,76 @@
+package bjc.utils.funcutils;
+
+import java.util.function.BiFunction;
+import java.util.function.Consumer;
+import java.util.function.Function;
+import java.util.function.UnaryOperator;
+
+/**
+ * Utility things for functions
+ *
+ * @author ben
+ *
+ */
+public class FuncUtils {
+	/**
+	 * Convert a binary function into a unary function that returns a
+	 * function
+	 *
+	 * @param <A>
+	 *                The initial type of the function
+	 * @param <B>
+	 *                The intermediate type of the function
+	 * @param <C>
+	 *                The terminal type of the function
+	 * @param func
+	 *                The function to transform
+	 * @return The function transformed into a unary function returning a
+	 *         function
+	 */
+	public static <A, B, C> Function<A, Function<B, C>> curry2(final BiFunction<A, B, C> func) {
+		return arg1 -> arg2 -> {
+			return func.apply(arg1, arg2);
+		};
+	}
+
+	/**
+	 * Do the specified action the specified number of times
+	 *
+	 * @param nTimes
+	 *                The number of times to do the action
+	 * @param cons
+	 *                The action to perform
+	 */
+	public static void doTimes(final int nTimes, final Consumer<Integer> cons) {
+		for (int i = 0; i < nTimes; i++) {
+			cons.accept(i);
+		}
+	}
+
+	/**
+	 * Return an operator that executes until it converges.
+	 *
+	 * @param op
+	 * 	The operator to execute.
+	 * @param maxTries
+	 * 	The maximum amount of times to apply the function in an
+	 * 	attempt to cause it to converge.
+	 */
+	public static <T> UnaryOperator<T> converge(final UnaryOperator<T> op, final int maxTries) {
+		return (val) -> {
+			T newVal = op.apply(val);
+			T oldVal;
+
+			int tries = 0;
+
+			do {
+				oldVal = newVal;
+				newVal = op.apply(newVal);
+
+				tries += 1;
+			} while(!newVal.equals(oldVal) && tries < maxTries);
+
+			return newVal;
+		};
+	}
+}