I am never going to complain about Python again

[Roy Smith]

In article <52562ee3$0$2931$c3e8da3$76491128 at news.astraweb.com>,
 Steven D'Aprano <steve at pearwood.info> wrote:

> Just came across this little Javascript gem:
> 
> ",,," == Array((null,'cool',false,NaN,4));
> 
> => evaluates as true
> 
> http://wtfjs.com/2011/02/11/all-your-commas-are-belong-to-Array
> 
> I swear, I am never going to complain about Python again.

I've just finished reading JavaScript: The Good Parts, by Douglas 
Crockford (now I'm working on the harder part of re-reading it slowly, 
to make sure I really understand it).  Anybody who is forced to work 
with javascript should read this book.  It's the K&R of JS.

Anyway, one of the pieces of advice he gives is to pretend that == 
doesn't exist, and always use ===.  PHP suffers from much the same 
problem.

BTW, here's a Python equality oddity:

>>> r = 0.0
>>> c = 0 + 0j
>>> r == c
True
>>> int(r) == int(c)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: can't convert complex to int

If x == y, then f(x) should also equal f(y).  More specifically, if x == 
y, and x is in the domain of f(), then y should also be in the domain of 
f().

BTW, one of the earliest things that turned me on to Python was when I 
discovered that it uses j as the imaginary unit, not i.  All 
right-thinking people will agree with me on this.