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Subject: Re: Implicit conversion to boolean in if and while statements
From: Rick Johnson <rantingrickjohnson@gmail.com>
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On Friday, February 8, 2013 7:17:26 PM UTC-6, Chris Angelico wrote:
> On Sat, Feb 9, 2013 at 11:49 AM, Rick Johnson
> >  nested_list = array(array(string))
> 
> Actually, that's not a declaration, that's an assignment; and in Pike,
> a 'type' is a thing, same as it is in Python (though not quite). If I
> were to declare it in Pike, it would be:
> 
> array(array(string)) nested_list;
> 
> Though the part inside the parens can be omitted, in which case the
> array can contain anything, rather than being restricted to strings.
> In actual fact, Rick, despite your complaints about the syntax, it's
> able to achieve exactly what you were thinking Python should do:
> declare an array/list that contains only numbers.

Well Chris i have wonderful news for you! Python /does/ have "homogenous arrays", and they're called, wait for it......... arrays! Imagine that!

py> import array
py> intSeq = array.array('i')
py> intSeq.append(1)
py> intSeq.append(2)
py> intSeq.append(5000)
py> intSeq.append(5000.333)
TypeError: integer argument expected, got float
py> intSeq.append('5000.333')
TypeError: an integer is required