Merge pull request #33 from Productive2/master

Two new tests

tests/japl/interning.jpl

@@ -0,0 +1,21 @@
+//compile time interning
+
+var a = "hello";
+var b = "hello";
+print(a is b);//output:true
+
+//runtime interning
+
+var f = "leafy";
+var g = "ishere";
+var h = f + g;
+var j = "leafyishere";
+print(h is j);//output:true
+
+//different strings
+
+var x = "ex";
+var y = "ey";
+print(x is y);//output:false
+
+

tests/japl/lambdachain.jpl

@@ -0,0 +1,18 @@
+
+var add2 = lambda(x)
+{
+    return x + 2;
+};
+var sub2 = lambda(x)
+{
+    return x - 2;
+};
+var mul2 = lambda(x)
+{
+    return x * 2;
+};
+
+print(add2(sub2(mul2(sub2(5)))));
+//5-2=3
+//3*2=6
+//output:6