examples: lang: Update examples

examples/lang/class-include.mcl

@@ -7,9 +7,11 @@ class foo {
 	}
 }
 
+$wow = "this is wow"	# gets captured
+
 class bar($a, $b) { # a parameterized class
 	print "bar-"+ $a {
-		msg => fmt.printf("inside bar: %s", $b),
+		msg => fmt.printf("inside bar: %s", $b + "; " + $wow),
 
 		Meta:autogroup => false,
 	}

examples/lang/polymorphic-lambda.mcl

@@ -0,0 +1,19 @@
+import "fmt"
+
+$add = func($x) {
+	$x + $x
+}
+
+$num = 2
+$out1 = $add($num) # 4
+
+print fmt.printf("%d + %d is %d", $num, $num, $out1) { # simple math
+	Meta:autogroup => false,
+}
+
+$val = "hello"
+$out2 = $add($val) # hellohello
+
+print fmt.printf("%s + %s is %s", $val, $val, $out2) { # simple concat
+	Meta:autogroup => false,
+}

examples/lang/virt2.mcl

@@ -2,7 +2,7 @@
 
 import "fmt"
 import "os"
-import "strings"
+import "golang/strings"
 import "example"
 
 $input = example.str2int(strings.trim_space(os.readfile("/tmp/cpu-count")))