1. JavaScript

3. XD

5. ; , . [] {}

6. -
-_-b
-
var _ = -1, b = -1;
return -_-b;

7. -
var a, b, c;
a = b = 1;
var node;
if(node = D.get(‘myId’)) {
// ...

8. -
if(a != b) -> if(a - b)
if(a == b) -> if(!(a - b))
== & ===,

9. -, . [] {}
;
,
{}

10. -, . [] {}
.
[]

11. -
new
in
delete
typeof
instanceof
typeof & instanceof?

13. -
var

14. -
if...else if
if continue/break?
switch...case

15. -
goto
for while/do...while?
do...while(0)?

16. -
debugger
return
throw
try...catch(e)

17. -
Function
jscex:

18. NaN: parse
undefined:
null NaN & undefined?

19. (Scalar)
(Object)

20. -

21. -

22. call & apply
arguments

23. -call & apply
var log = function() {
window.console && console.log.apply(console, arguments);
};
var w = document.write;
w.call(document, ‘some message’);

24. -arguments
It’s automatic
var init = function() {
return function() {
if(arguments.callee.invoked) return;
arguments.callee.invoked = true;
// ...

26. janlay@gmail.com
@janlay