On 2010-09-30, RG wrote:
> In article ,
> Seebs wrote:
>> And that's the magic of static typing: It is not a false positive to
>> warn you that "2L" is not of type int.
> We'll have to agree to disagree about that.
No, we won't. It's t
On 2010-09-30, RG wrote:
> My code compiles with no warnings under gcc -Wall.
That's nice. gcc -Wall uses only a small subset of warnings that fit
the usual expectations of C code that's trying to work on common
architectures.
>> 2. The constant is not of type int, and the compiler will warn y
On 2010-09-30, Lie Ryan wrote:
> On 09/30/10 16:09, TheFlyingDutchman wrote:
>> Dynamic typed languages like Python fail in this case on "Never blows
>> up".
> How do you define "Never blows up"?
I would say "blow up" would be "raise an exception".
> Personally, I'd consider maximum(8589934592,
On 2010-09-30, Pascal Bourguignon wrote:
> Nick Keighley writes:
>> do you have any evidence that this is actually so? That people who
>> program in statically typed languages actually are prone to this "well
>> it compiles so it must be right" attitude?
> Yes, I can witness that it's in the min
On 2010-09-30, RG wrote:
> You can't have it both ways. Either I am calling it incorrectly, in
> which case I should get a compiler error,
You get a warning if you ask for it. If you choose to run without all
the type checking on, that's your problem.
-s
--
Copyright 2010, all wrongs reverse
On 2010-09-30, Paul Rubin wrote:
> int maximum(int a, int b);
>
> int foo() {
> int (*barf)() = maximum;
> return barf(3);
> }
> This compiles fine for me. Where is the cast?
On the first line of code inside foo().
> Where is the error message?
You chose to use a form
On 2010-09-30, RG wrote:
> We lost some important context somewhere along the line:
>> > > in C I can have a function maximum(int a, int b) that will always
>> > > work. Never blow up, and never give an invalid answer. If someone
>> > > tries to call it incorrectly it is a compile error.
> Pleas
On 2010-09-30, TheFlyingDutchman wrote:
> even with the option -Wall (all warnings).
For various historical reasons, "-Wall" has the semantics you might
expect from an option named "-Wsome-common-warnings-but-not-others".
-s
--
Copyright 2010, all wrongs reversed. Peter Seebach / usenet-nos...
On 2010-09-30, RG wrote:
> Of course. Computers always do only exactly what you ask of them. On
> this view there is, by definition, no such thing as a bug, only
> specifications that don't correspond to one's intentions.
f00f.
That said... I think you're missing Keith's point.
> Unfortun
On 2010-09-30, Bruce Whealton wrote:
> Next, from the documentation I see and this is just an example (this
> kind of notation is seen elsewhere in the documentation:
> str.count(sub[, start[, end]])
> This particular example is from the string methods.
> Is this a nesting of two lists inside a
On 2010-09-30, namekuseijin wrote:
> it generates a list from syntax comprehended in list-like syntax!
Okay, help me out here. (Killed the crossposting.)
I am not understanding how the word applies. I'm fine with it, but I don't
see any relation at all between the thing called a list comprehen
On 2010-09-30, RG wrote:
> That the problem is "elsewhere in the program" ought to be small
> comfort.
It is, perhaps, but it's also an important technical point: You CAN write
correct code for such a thing.
> int maximum(int a, int b) { return a > b ? a : b; }
> int main() {
> long x = 858
On 2010-09-29, Hugo L?veill? wrote:
> One I am looking for, is time since last user mouse or keyboard action.
> So I guess I am looking for the exact same thing a screensaver is
> looking for
You can probably get it from X somehow, but... Basically, be aware that
it is entirely possible for a Lin
On 2010-09-29, Hugo L?veill? wrote:
> I have found it for windows and mac, but no luck under linux. Any idea?
I don't think it's semantically well-defined. What makes a system "idle"?
Is the machine in my basement idle? I don't think anyone's touched the
keyboard in a week, but it's spent a bi
On 2010-09-29, Lawrence D'Oliveiro wrote:
> In message , Seebs wrote:
>> Helps, perhaps, that I got exposed to group theory early enough to be used
>> to redefining + and * to be any two operations which have interesting
>> properties ...
> But groups only have one
On 2010-09-29, Tracubik wrote:
> Hi all,
> I'm studying PyGTK tutorial and i've found this strange form:
>
> button = gtk.Button(("False,", "True,")[fill==True])
>
> the label of button is True if fill==True, is False otherwise.
>
> i have googled for this form but i haven't found nothing, so can
On 2010-09-29, Hidura wrote:
> I am working on a web project written on Py3k and using mod_wsgi on
> the Apache that have to recibes the request client via a xml structure
> and i am facing a lot of troubles with the upload files mainly because
> i can' t see where they are, so i' ve decide to wri
On 2010-09-28, Gary Herron wrote:
> Python does have "s+=t" as a statement, and it does have list
> comprehensions [... for ...] as expressions, but you cannot put a
> statement inside an expression.
I've inferred that, in Python, all assignments are by definition
statements, rather than expre
On 2010-09-28, Nick Donohue wrote:
> why would I use these? wouldn't it be more flexible to not write the
> decorator before the function definition, so I could choose to wrap it
> or not?
The utility is that it lets you modify all calls to a function at once,
without changing all the instances i
On 2010-09-28, John Bokma wrote:
> Seebs writes:
>> On 2010-09-26, J?rgen Exner wrote:
>>> It was livibetter who without any motivation or reasoning posted Python
>>> code in CLPM.
>> Not exactly; he posted it in a crossposted thread, which happened to
On 2010-09-26, J?rgen Exner wrote:
> It was livibetter who without any motivation or reasoning posted Python
> code in CLPM.
Not exactly; he posted it in a crossposted thread, which happened to include
CLPM and other groups, including comp.lang.python.
It is quite possible that he didn't know ab
On 2010-09-26, Xah Lee wrote:
> On Sep 25, 11:17??pm, Paul Rubin wrote:
>> Python solution follows (earlier one with an error cancelled). ??All
>> crossposting removed since crossposting is a standard trolling tactic.
> btw, i disagree about your remark on crossposting.
You're wrong. Crosspost
On 2010-09-26, Steven D'Aprano wrote:
> On Sat, 25 Sep 2010 23:46:57 -0700, Paul Rubin wrote:
>> I think the idea is you should not be able to do mathematical operations
>> on strings, and if you try to do one, Python should raise an exception,
>> rather than using hokey analogies to guess at what
On 2010-09-23, Andreas Waldenburger wrote:
> On 23 Sep 2010 03:54:52 GMT Seebs wrote:
>> I don't generally like constructs where important structural
>> information comes late in the construct. [snip]
> I think that is precisely the reason that the elements of the lis
On 2010-09-23, loial wrote:
> How can I check whether a file is being written to by another process
> before I access it?
You mean "written to" or "open for possible writing"?
It may be possible (with sufficient privileges) to determine that a
file has been opened for writing. I don't think you
On 2010-09-23, John Bokma wrote:
> Seebs writes:
>> I dunno. I like the "next if /^$/" idiom,
> I don't (as a Perl programmer), I prefer:
Huh, those are actually nicer. I didn't know that was possible; it
wouldn't have occurred to me to try to put &q
On 2010-09-23, Steven D'Aprano wrote:
> On Thu, 23 Sep 2010 01:49:44 +0000, Seebs wrote:
>> But I do think it's unfair to dismiss it as purely a matter of baby duck
>> syndrome. Consistency in ordering of corresponding idioms seems a
>> reasonable goal.
>
On 2010-09-23, Steven D'Aprano wrote:
> Yes, it certainly is. Describing it as "an ugly format" is also a matter
> of taste -- taste which in my opinion simply isn't justified by anything
> other than familiarity.
It may not be convincing to other people, but the logical inversion strikes
me as
On 2010-09-21, Steven D'Aprano wrote:
> Yes, I know that. I sympathized with your experience and explicitly said
> I was talking about "generic you".
Hah! Then it was *I* who wasn't reading carefully enough! I bet you
didn't expect *THAT*!
-s
--
Copyright 2010, all wrongs reversed. Peter Se
On 2010-09-21, Steven D'Aprano wrote:
> On Tue, 21 Sep 2010 03:01:53 +0000, Seebs wrote:
>> On 2010-09-21, geremy condra wrote:
>> Then I posted a question on an IRC channel. I had done a ton of
>> searching already, and I started by explaining the top three
>>
On 2010-09-21, geremy condra wrote:
> I use them when I want to conceal the target of the link. Usually here
> that just means its a letmegooglethatforyou.com link, which I find
> more amusing than is probably healthy.
I thought the idea was funny at first.
Then I posted a question on an IRC cha
On 2010-09-21, Steven D'Aprano wrote:
> On Mon, 20 Sep 2010 19:28:49 +0200, Antoon Pardon wrote:
>> Not necessarily. Some of us have the impression that Guido deliberatly
>> chose an ugly format for the ternary operator.
> If he did, then he must have changed his mind, because there is nothing
>
On 2010-09-20, Antoon Pardon wrote:
> Not necessarily. Some of us have the impression that Guido deliberatly
> chose an ugly format for the ternary operator. Guido has alwasys been
> against a ternary operator but the requests kept coming. So eventually
> he introduced one. But the impression is t
On 2010-09-20, Tim Harig wrote:
> You could simply place the filter in slrn; then, any urls that you see in
> your reader would already be shown with the preview prefix suitable for cut
> and paste mechanisms. If you wanted, you can even have your script
> download the preview and automatically c
On 2010-09-20, Steven D'Aprano wrote:
> On Sun, 19 Sep 2010 07:36:11 +0000, Seebs wrote:
>> No, but the syntax should be invisible. When I read English, I don't
>> have to think about nouns and verbs and such unless something is very
>> badly written.
> That
On 2010-09-20, Steven D'Aprano wrote:
> I don't know about how other people speed-read, but I can assure you that
> when my wife speed-reads, she's not just scanning a few words and
> interpolating between them. She can give you a detailed summary of what
> *actually* happened, not just a good
On 2010-09-20, Tim Harig wrote:
> 1. Don't bother to manually paste when you can use something like urlview
> to lauch directly.
I don't know that this would actually be better than what I currently do,
which is grab text and middle-click in another window.
> If you want this behavio
On 2010-09-20, Tim Harig wrote:
> On 2010-09-20, Seebs wrote:
>> * No hint as to what site you'll be getting redirected to.
> Tinyurl, in particular, allows you to preview the url if you choose to do
> so. Other URL shortning services have a similar feature.
I have no i
On 2010-09-20, John Bokma wrote:
> I didn't mean that there are spoilers in the first 70 pages, just that
> to me the excercise would spoil the book, so, I wouldn't do it. I
> consider a book like a meal, I wouldn't gobble down food, regurgitate
> it, and eat it again at a slower pace. Books, movi
On 2010-09-20, Steven D'Aprano wrote:
> On Sun, 19 Sep 2010 06:16:49 -0700, Aahz wrote:
>> Please don't use tinyurl -- it's opaque and provides zero help to anyone
>> who might later want to look it up (and also no accessibility if tinyurl
>> ever goes down). At the very least, include the origin
On 2010-09-20, John Bokma wrote:
> Heh, to me speed reading those 70 pages in a very short while,
> concluding that it's a good book, and start over again would be quite
> the spoiler.
I rarely encounter substantive spoilers in the first 70 pages or so of
a book. That said, I'm pretty much immun
On 2010-09-20, alex23 wrote:
> AK wrote:
>> When I was reading The book of the new sun, though, I could stop and
>> read a single sentence a few times over and reflect on it for a minute.
> Totally understandable, Wolfe is a far, far greater writer than
> Rowling :)
Certainly true. On the othe
On 2010-09-19, Gregory Ewing wrote:
> AK wrote:
>> Afaik the idea is that you can read a novel at the speed of half a page
>> a second or so and understand it to the same extent as people who'd read
>> at a normal rate.
> I've never understood why anyone would *want* to read a
> novel that fast,
On 2010-09-19, MRAB wrote:
> On 19/09/2010 22:32, Seebs wrote:
>> On 2010-09-19, AK wrote:
>>> Because that's what 'if' and 'else' mean.
>> My point is, I don't want the order of the clauses in if/else to change.
>> If it is sometim
On 2010-09-19, AK wrote:
> Because that's what 'if' and 'else' mean.
My point is, I don't want the order of the clauses in if/else to change.
If it is sometimes "if else ", then
it should *ALWAYS WITHOUT EXCEPTION* be condition first, then true clause,
then false clause. If it's sometimes "if
On 2010-09-19, AK wrote:
> On 09/19/2010 03:31 AM, Seebs wrote:
>> Just like:
>> if condition:
>> foo
>> else:
>> bar
>> The condition is the primary, the clauses are secondary to it.
> To me, the problem with C ternary i
On 2010-09-19, Steven D'Aprano wrote:
> I'm not entirely sure I agree with you here... you can't ignore syntax in
> order to understand the meaning of code.
No, but the syntax should be invisible. When I read English, I don't have
to think about nouns and verbs and such unless something is very
On 2010-09-19, Steven D'Aprano wrote:
> Define "unbalanced".
I'm not sure that's the word I'd use. I'm not even sure what it would mean
here.
> Putting aside the over-use of punctuation, The C syntax feels unbalanced
> to me. You have:
> condition IF true-clause ELSE false-clause
> so both c
On 2010-09-19, AK wrote:
> On 09/18/2010 08:35 PM, Seebs wrote:
>> That wouldn't be *syntax* highlighting, that'd be *semantic* highlighting.
> In case of programming, the effect is similar.
I have not found that to be the case. It's been exactly the same as syn
On 2010-09-19, AK wrote:
> Funny that you should say that, because I thought quite a few times that
> it would be really awesome if some texts in English had syntax
> highlighting. Obviously, not Brothers Karamazov, but something like a
> tutorial, or a manual, or an online article. If key words w
On 2010-09-18, AK wrote:
> On 09/18/2010 06:56 PM, Seebs wrote:
>> Basically, I can handle
>> do x if y
>> pretty well, but
>> do x if y else z
>> always breaks my parser.
>> So in English, I might say "I'll go to the store if I have t
On 2010-09-18, Steven D'Aprano wrote:
> On Fri, 17 Sep 2010 16:01:54 -0400, Andreas Waldenburger wrote:
>> On Thu, 16 Sep 2010 16:20:33 -0400 AK wrote:
>>> I also like this construct that works, I think, since 2.6:
>>> code = dir[int(num):] if side == 'l' else dir[:-1*int(num)]
>> I wonder when
On 2010-07-15, bolega wrote:
> This makes some sense. He replied on the newsgroup in a lengthy post
> that there are sufficient resources out there giving hint that no one
> need help me out. Then I was called "lazy" in one email and tersely
> given JUST the last name of an author who has many boo
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