adding data structure tree

Author: mamenesia

tree/directions.md

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+#  --- Directions
+
+* 1) Create a node class.  The constructor
+should accept an argument that gets assigned
+to the data property and initialize an
+empty array for storing children. The node
+class should have methods 'add' and 'remove'.
+
+* 2) Create a tree class. The tree constructor
+should initialize a 'root' property to null.
+
+* 3) Implement 'traverseBF' and 'traverseDF'
+on the tree class.  Each method should accept a
+function that gets called with each element in the tree
+
+

tree/index.js

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+// --- Directions
+// 1) Create a node class.  The constructor
+// should accept an argument that gets assigned
+// to the data property and initialize an
+// empty array for storing children. The node
+// class should have methods 'add' and 'remove'.
+// 2) Create a tree class. The tree constructor
+// should initialize a 'root' property to null.
+// 3) Implement 'traverseBF' and 'traverseDF'
+// on the tree class.  Each method should accept a
+// function that gets called with each element in the tree
+
+
+class Node {
+  constructor(data) {
+    this.data = data;
+    this.children = [];
+  }
+
+  add(data) {
+    this.children.push(new Node(data));
+  }
+
+  remove(data) {
+    this.children = this.children.filter( node => {
+      return node.data !== data;
+    });
+  }
+}