bump to 0.4.2 for this.block() with a passing test

index.js

@@ -227,7 +227,8 @@ function walk (root, cb, immutable) {
             after : function (f) { modifiers.after = f },
             pre : function (f) { modifiers.pre = f },
             post : function (f) { modifiers.post = f },
-            stop : function () { alive = false }
+            stop : function () { alive = false },
+            block : function () { keepGoing = false },
         };
 
         if (!alive) return state;

package.json

@@ -1,6 +1,6 @@
 {
     "name" : "traverse",
-    "version" : "0.4.1",
+    "version" : "0.4.2",
     "description" : "Traverse and transform objects by visiting every node on a recursive walk",
     "author" : "James Halliday",
     "license" : "MIT/X11",

test/subexpr.js

@@ -16,3 +16,19 @@ exports.subexpr = function () {
         'c', [ 5.9, 6, 6.1 ],
     ]);
 };
+
+exports.block = function () {
+    var obj = [ [ 1 ], [ 2 ], [ 3 ] ];
+    var r = traverse(obj).map(function (x) {
+        if (Array.isArray(x) && !this.isRoot) {
+            if (x[0] === 5) this.block()
+            else this.update([ [ x[0] + 1 ] ])
+        }
+    });
+
+    assert.deepEqual(r, [
+        [ [ [ [ [ 5 ] ] ] ] ],
+        [ [ [ [ 5 ] ] ] ],
+        [ [ [ 5 ] ] ],
+    ]);
+};