add test file diff.nas

test/calc.nas

@@ -38,6 +38,7 @@ var testfile=[
     "test/calc.nas         ",
     "test/choice.nas       ",
     "test/class.nas        ",
+    "test/diff.nas         ",
     "test/exception.nas    ",
     "test/fib.nas          ",
     "test/filesystem.nas   ",

test/scalar.nas

@@ -191,4 +191,10 @@ var a={
     }
 };
 println(isa(a.new(),a)); # 1
-println(isa(a.new2(),a));# 0
+println(isa(a.new2(),a));# 0
+
+var a=[10,-10,0,1,2,3,nil,"string","hello",[],[0,1,2,3],{},{a:0,b:1,c:2},func{}];
+println("type\tsize\tnum\tsrc");
+foreach(var i;a){
+    println(typeof(i),'\t',size(i),'\t',num(i),'\t',i);
+}