mjschultz

10 jaar geledendiscuss

Both my cats get up on the refrigerator easily.

11 jaar geledendiscuss

I was curious so I decided to post some of the Google links about this:

* man page: http://manpages.ubuntu.com/manpages/trusty/man1/pollinate.1....

* Q&A style blog post: http://blog.dustinkirkland.com/2014/02/random-seeds-in-ubunt...

* A "why this is scary" blog post: https://tim.siosm.fr/blog/2014/04/25/why-not-ubuntu-14.04-lt...

mjschultz

12 jaar geledendiscuss

I'm referring to this code on the originally linked page [1] (you'll have to scroll back a bit because your header blocks the content).

In the context of this thread, brghts states that this is dangerous because if you compile with -DNDEBUG the assert is optimized away.

So if I copy that code with the assert statement, it will be optimized away and your code no longer performs the NULL check. This is bad.

As you mention, beginners tend to copy code off the Internet and cause bugs. If you recognize this and claim to be teaching people you should not use bad practices in your example code. Period.

If you don't want to muddy the waters with your custom debug macros, then you should still play it safe when checking return values the a beginner may simply copy and think is correct.

[1]: http://c.learncodethehardway.org/book/krcritique.html#code--...

mjschultz

12 jaar geledendiscuss

In a chapter about deconstructing someone else's book, your own book also does dangerous things according to yourself:

> The problem is, as with every book with code ever in the universe, beginners will copy that code out and use it somewhere else and then the function is wrong.

Yet, if a beginner copied some of the code in this chapter they'd have the exact bug you are talking about here (using the NULL pointer returned from malloc()).

I think you should probably expand that into the safer checks (don't forget to free(line) if longest is NULL too!).

mjschultz

12 jaar geledendiscuss

I seem to get a 500 error page whenever I search for something along the lines of "NOT label:css". I was hoping to be able to find issues that are not labeled as something.

Other than that this seems like a great improvement!

mjschultz

12 jaar geledendiscuss

You might want to check out the CELERY_SEND_TASK_ERROR_EMAILS configuration option: http://celery.readthedocs.org/en/latest/configuration.html#c...

mjschultz

12 jaar geledendiscuss

Here is his response to that question on the mailing list:

http://mail.tarsnap.com/tarsnap-users/msg00846.html

mjschultz

12 jaar geledendiscuss

That code should only create the dict/namedtuple instance once, then access it many, many times.

The creation occurs in the --setup portion. The field accesses occur in the actual looping portion of the timeit code.

mjschultz

12 jaar geledendiscuss

The --setup code (creating the namedtuple and dict) is only executed once.

The timed portion is simply the field accesses.

mjschultz

12 jaar geledendiscuss

Does the --setup statement really get timed?

My reading of the docs[1] has always led me to believe that it doesn't. For example, "It is possible to provide a setup statement that is executed only once at the beginning"

[1]: http://docs.python.org/2/library/timeit.html

mjschultz

12 jaar geledendiscuss

I'm probably doing it wrong but I measured exactly this yesterday and the dict version was faster:

    $ python -m timeit --setup "from collections import namedtuple; Point = namedtuple('Point', ['x', 'y']); p = Point(x=0, y=0)" "p.x + p.y"
    1000000 loops, best of 3: 0.284 usec per loop

vs.

    $ python -m timeit --setup "p = {'x': 0, 'y': 0}" "p['x'] + p['y']"
    10000000 loops, best of 3: 0.0737 usec per loop

Maybe the use isn't right because I agree with your belief that namedtuple is suppose to be more performant.

mjschultz

13 jaar geledendiscuss

To answer your question directly, no I don't think so (perhaps some updated theories, but nothing concrete).

But the article does cover more than just the incident, I found the whole thing fairly interesting.

Beyond the passing knowledge I have from growing up in Chicago-land around the time and the Wikipedia article on the subject, I thought it contextualized the FCC policies around the time of the incident and how the hack worked (from a high level). It also pointed out other signal intrusions from the same period and the FCC/FBI's methods to track down the perpetrators.

mjschultz

13 jaar geledendiscuss

Also, here is the Wikipedia article on the matter [1]. And a Reddit thread (presented as one of the theories in the article) [2].

[1]: http://en.wikipedia.org/wiki/Max_Headroom_broadcast_signal_i...

[2]: http://www.reddit.com/r/IAmA/comments/eeb6e

mjschultz

13 jaar geledendiscuss

For anyone interested in looking for at this, here is the wikipedia article: https://www.wikipedia.org/wiki/Flow_(psychology)

mjschultz

13 jaar geledendiscuss

Safeway is called Dominick's in Chicago (Safeway Inc. purchased Dominick's in 1998, but left the name because branch loyalty I would guess).

Source: Former Chicago native that purchased Safeway branded food at Dominick's.

mjschultz

13 jaar geledendiscuss

I think their policy is typically to update to the latest model if the order hasn't shipped yet.

The same thing happened to be when I ordered a MacBook back in 2007, where a few days later they announced better specs and I got a notification saying they updated my order to reflect the changes.

It's one of the reasons my next laptop will probably still be Apple.

mjschultz

13 jaar geledendiscuss

Or you're reading it upside-down, making it "06/" which would mean it was taken in June (much less surprising since it is now early July).

mjschultz

13 jaar geledendiscuss

Here's a previous discussion of this post as well: https://news.ycombinator.com/item?id=5600883

mjschultz

13 jaar geledendiscuss

It's also using dygraphs javascript visualizations for the timeseries instead of Google Charts.

mjschultz

13 jaar geledendiscuss

Here is a recent discussion on chromium-dev about the password manager: https://groups.google.com/a/chromium.org/forum/#!searchin/ch...

Evidently, only 0.0085% of users toggle on the "Use a master password"

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