5 files changed, 61 insertions, 20 deletions
diff --git a/src/main/java/bjc/esodata/QueueStack.java b/src/main/java/bjc/esodata/QueueStack.java
index 49476f0..55c6fc4 100644
--- a/src/main/java/bjc/esodata/QueueStack.java
+++ b/src/main/java/bjc/esodata/QueueStack.java
@@ -29,14 +29,14 @@ public class QueueStack<T> extends Stack<T> {
 
 	@Override
 	public T pop() {
-		if(backing.isEmpty()) throw new StackUnderflowException();
+		if(backing.isEmpty()) throw new StackUnderflow();
 
 		return backing.remove();
 	}
 
 	@Override
 	public T top() {
-		if(backing.isEmpty()) throw new StackUnderflowException();
+		if(backing.isEmpty()) throw new StackUnderflow();
 
 		return backing.peek();
 	}
@@ -47,7 +47,7 @@ public class QueueStack<T> extends Stack<T> {
 	}
 
 	@Override
-	public boolean empty() {
+	public boolean isEmpty() {
 		return backing.size() == 0;
 	}
 
diff --git a/src/main/java/bjc/esodata/SimpleStack.java b/src/main/java/bjc/esodata/SimpleStack.java
index 41b217d..dc6566c 100644
--- a/src/main/java/bjc/esodata/SimpleStack.java
+++ b/src/main/java/bjc/esodata/SimpleStack.java
@@ -27,14 +27,14 @@ public class SimpleStack<T> extends Stack<T> {
 
 	@Override
 	public T pop() {
-		if(backing.isEmpty()) throw new StackUnderflowException();
+		if(backing.isEmpty()) throw new StackUnderflow();
 
 		return backing.pop();
 	}
 
 	@Override
 	public T top() {
-		if(backing.isEmpty()) throw new StackUnderflowException();
+		if(backing.isEmpty()) throw new StackUnderflow();
 
 		return backing.peek();
 	}
@@ -45,7 +45,7 @@ public class SimpleStack<T> extends Stack<T> {
 	}
 
 	@Override
-	public boolean empty() {
+	public boolean isEmpty() {
 		return backing.size() == 0;
 	}
 
diff --git a/src/main/java/bjc/esodata/SpaghettiStack.java b/src/main/java/bjc/esodata/SpaghettiStack.java
index 9280c28..1b7af25 100644
--- a/src/main/java/bjc/esodata/SpaghettiStack.java
+++ b/src/main/java/bjc/esodata/SpaghettiStack.java
@@ -37,14 +37,14 @@ class SpaghettiStack<T> extends Stack<T> {
 
 	@Override
 	public T pop() {
-		if(backing.empty()) return parent.pop();
+		if(backing.isEmpty()) return parent.pop();
 
 		return backing.pop();
 	}
 
 	@Override
 	public T top() {
-		if(backing.empty()) return parent.top();
+		if(backing.isEmpty()) return parent.top();
 
 		return backing.top();
 	}
@@ -55,8 +55,8 @@ class SpaghettiStack<T> extends Stack<T> {
 	}
 
 	@Override
-	public boolean empty() {
-		return backing.empty() && parent.empty();
+	public boolean isEmpty() {
+		return backing.isEmpty() && parent.isEmpty();
 	}
 
 	@SuppressWarnings("unchecked")
diff --git a/src/main/java/bjc/esodata/Stack.java b/src/main/java/bjc/esodata/Stack.java
index 13480a3..f28e882 100644
--- a/src/main/java/bjc/esodata/Stack.java
+++ b/src/main/java/bjc/esodata/Stack.java
@@ -1,13 +1,14 @@
 package bjc.esodata;
 
-import java.util.ArrayList;
-import java.util.List;
-import java.util.function.Consumer;
+import java.util.*;
+
+import java.util.function.*;
 
 /*
  * @TODO 10/11/17 Ben Culkin :StackCombinators
  * 	Implement more combinators for the stack.
  */
+
 /**
  * A stack, with support for forth/factor style stack combinators.
  *
@@ -15,7 +16,7 @@ import java.util.function.Consumer;
  * <h2>Stack underflow</h2>
  * <p>
  * NOTE: In general, using any operation that attempts to remove more data from
- * the stack than exists will cause a {@link StackUnderflowException} to be
+ * the stack than exists will cause a {@link StackUnderflow} to be
  * thrown. Check the size of the stack if you want to avoid this.
  * <p>
  * </p>
@@ -32,7 +33,7 @@ public abstract class Stack<T> {
 	 *
 	 * @author EVE
 	 */
-	public static class StackUnderflowException extends RuntimeException {
+	public static class StackUnderflow extends RuntimeException {
 		/* The ID of the exception */
 		private static final long serialVersionUID = 1423867176204571539L;
 	}
@@ -46,6 +47,18 @@ public abstract class Stack<T> {
 	public abstract void push(T elm);
 
 	/**
+	 * Push multiple elements onto the stack.
+	 *
+	 * @param elms
+	 * 	The elements to insert.
+	 */
+	public void pushAll(T... elms) {
+		for (T elm : elms) {
+			push(elm);
+		}
+	}
+
+	/**
 	 * Pop an element off of the stack.
 	 *
 	 * @return The element on top of the stack.
@@ -72,7 +85,9 @@ public abstract class Stack<T> {
 	 *
 	 * @return Whether or not the stack is empty.
 	 */
-	public abstract boolean empty();
+	public boolean isEmpty() {
+		return size() == 0;
+	}
 
 	/**
 	 * Create a spaghetti stack branching off of this one.
@@ -136,10 +151,10 @@ public abstract class Stack<T> {
 		final List<T> lst = new ArrayList<>(n);
 
 		for(int i = n; i > 0; i--) {
-			lst.set(i - 1, pop());
+			lst.add(0, pop());
 		}
 
-		for(int i = 0; i < m; i++) {
+		for(int i = 0; i <= m; i++) {
 			for(final T elm : lst) {
 				push(elm);
 			}
@@ -153,7 +168,7 @@ public abstract class Stack<T> {
 	 *        The number of items to duplicate.
 	 */
 	public void dup(final int n) {
-		multidup(n, 2);
+		multidup(n, 1);
 	}
 
 	/** Duplicate the top item on the stack. */
diff --git a/src/main/java/bjc/esodata/ThresholdSet.java b/src/main/java/bjc/esodata/ThresholdSet.java
index bc1b517..245eb5f 100644
--- a/src/main/java/bjc/esodata/ThresholdSet.java
+++ b/src/main/java/bjc/esodata/ThresholdSet.java
@@ -57,7 +57,7 @@ public class ThresholdSet<KeyType> {
 			// Will throw a ClassCastException if you give us something bad.
 			KeyType k = (KeyType)o;
 
-			int ret = ThresholdSet.this.remove(k);
+			int ret = ThresholdSet.this.contains(k);
 
 			// The object is set-visible
 			if (ret == 1) return true;
@@ -235,6 +235,32 @@ public class ThresholdSet<KeyType> {
 		return new SetView();
 	}
 
+	/**
+	 * Static threshold set constructor.
+	 *
+	 * @param keys
+	 * 	The initial keys to add to the threshold set.
+	 */
+	public static <KType> ThresholdSet<KType> TS(KType... keys) {
+		ThresholdSet<KType> ts = new ThresholdSet<>();
+
+		ts.addKeys(keys);
+
+		return ts;
+	}
+
+	@Override
+	public String toString() {
+		StringBuilder sb = new StringBuilder();
+
+		sb.append("Set: ");
+		sb.append(keySet);
+		sb.append("\nMap: ");
+		sb.append(keyMap);
+
+		return sb.toString();
+	}
+
 	// Implementation methods for setView
 
 	int setSize() {