camelcaseblog

## undefined_key.js
> var o = {};
> console.log(o.x);
undefined

## null_vs_undefined.js
> null == undefined
true
> null === undefined
false
> !!null === !!undefined
true
> typeof null
"object"
> typeof undefined
"undefined"

## variable_with_undefined.js
> var x = undefined;
> console.log(x);
undefined

## missing_parameter.js
> function f(x) { console.log(x); }
> f()
undefined

## reference_error.js
> console.log(x);
Uncaught ReferenceError: x is not defined

## plus-casting.js
> [] + []
''
> [] + {}
'[object Object]'
> {} + []
0

## array-casting.js
> [2,3].toString()
'2,3'
> [].toString()
''
> Boolean([].toString())
false
> Boolean([])
true

## 05_python_flufl_dict
>>> from __future__ import barry_as_FLUFL
>>> barry_as_FLUFL.__dict__
{'optional': (3, 1, 0, 'alpha', 2), 'mandatory': (3, 9, 0, 'alpha', 0), 'compiler_flag': 262144}

## 05_python_future_print_dict
>>> from __future__ import print_function
>>> print_function.__dict__
{'mandatory': (3, 0, 0, 'alpha', 0), 'optional': (2, 6, 0, 'alpha', 2), 'compiler_flag': 65536}

## 05_python_flufl
>>> 0 != 1
True

>>> from __future__ import barry_as_FLUFL
>>> 0 != 1
  File "<stdin>", line 1
    0 != 1
       ^
SyntaxError: with Barry as BDFL, use '<>' instead of '!='
	> null == undefined
	true
	> null === undefined
	false
	> !!null === !!undefined
	true
	> typeof null
	"object"
	> typeof undefined
	"undefined"
	> [2,3].toString()
	'2,3'
	> [].toString()
	''
	> Boolean([].toString())
	false
	> Boolean([])
	true
	>>> from __future__ import barry_as_FLUFL
	>>> barry_as_FLUFL.__dict__
	{'optional': (3, 1, 0, 'alpha', 2), 'mandatory': (3, 9, 0, 'alpha', 0), 'compiler_flag': 262144}
	>>> from __future__ import print_function
	>>> print_function.__dict__
	{'mandatory': (3, 0, 0, 'alpha', 0), 'optional': (2, 6, 0, 'alpha', 2), 'compiler_flag': 65536}
	>>> 0 != 1
	True

	>>> from __future__ import barry_as_FLUFL
	>>> 0 != 1
	File "<stdin>", line 1
	0 != 1
	^
	SyntaxError: with Barry as BDFL, use '<>' instead of '!='