Edit: Actually, I thought about it, and I don’t think clang’s behavior is wrong in the examples he cites. Basically, you’re using an uninitialized variable, and choosing to use compiler settings which make that legal, and the compiler is saying “Okay, you didn’t give me a value for this variable, so I’m just going to pick one that’s convenient for me and do my optimizations according to the value I picked.” Is that the best thing for it to do? Maybe not; it certainly violates the principle of least surprise. But, it’s hard for me to say it’s the compiler’s fault that you constructed a program that does something surprising when uninitialized variables you’re using happen to have certain values.
You got it correct in this edit. But the important part is that gcc will also do this, and they both are kinda expected to do so. The article cites some standard committee discussions: somebody suggested ensuring that signed integer overflow in C++20 will not UB, and the committee decided against it. Also, somebody suggested not allowing to optimize out the infinite loops like 13 years ago, and then the committee decided that it should be allowed. Therefore, these optimisations are clearly seen as features.
And these are not theoretical issues by any means, there has been this vulnerability in the kernel for instance: lwn.net/Articles/342330/ which happened because the compiler just removed a null pointer check.
I’m asking because I’m wondering if there’s a more efficient way for me to handle my notes at work. Currently I just use a txt file in Notepad++. I use this file to track all of the stuff I have to do, such as tasks for stories I’m working on, next steps for projects, discussions I need to follow up on, questions and...
You might also like github.com/nvim-neorg/neorg which is not meant to be compatible with Emacs org-mode, but rather something new that’s built around similar ideas but for Neovim. Hadn’t used it myself though, only heard about it.
Not sure how many people were suffering from it, but Google Photos became adamant about pushing ads. I couldn’t find a replacement in Google Store which wasn’t doing the same. Downloaded F Droid, used alternative to website to find apps, downloaded and now the problem is solved. You can use Google Files to install the F...
You could make an argument that not using banking apps decreases your security, since most banks use either SMS or those apps as the second factor while confirming the operations. It is true that the apps are of varying quality, but SMS is not really a serious alternative. Some banks do have apps that are limited to confirming operations, and one bank where I live did recently start accepting U2F, which is amazing news.
Every prime larger than 3 is either of form 6k+1, or 6k+5; the other four possibilities are either divisible by 2 or by 3 (or by both). Now (6k+1)² − 1 = 6k(6k+2) = 12k(3k+1) and at least one of k and 3k+1 must be even. Also (6k+5)² − 1 = (6k+4)(6k+6) = 12(3k+2)(k+1) and at least one of 3k+2 and k+1 must be even.
Imagine a soccer ball. The most traditional design consists of white hexagons and black pentagons. If you count them, you will find that there are 12 pentagons and 20 hexagons.
Now imagine you tried to cover the entire Earth in the same way, using similar size hexagons and pentagons (hopefully the rules are intuitive). How many pentagons would be there? Intuitively, you would think that the number of both shapes would be similar, just like on the soccer ball. So, there would be a lot of hexagons and a lot of pentagons. But actually, along with many hexagons, you would still have exactly 12 pentagons, not one less, not one more. This comes from the Euler’s formula, and there is a nice sketch of the proof here: math.stackexchange.com/a/18347.
Isn’t this the point though? Like, if you spot that (let’s concretize) the trash is starting to overflow, you can either take it out right now which will take you 2 minutes and (hopefully) barely interrupt your day, or you can add it to your list of things to do. And so you get that list of 59 things by ignoring the 2-minute rule, not by applying it.
I would like to learn a couple of languages (polish and Japanese - I already learned Spanish to a decent degree) but it seems like every solution is closed source....
Same for Polish. One funny thing I’ve noticed is that in one of the examples, the person tries to stay at a hotel, and the price is clearly in the old currency, which has not been used since 1997.
C and C++ Prioritize Performance over Correctness (research.swtch.com)
From Russ Cox...
Question for software developers: how do you organize your To Do list at work?
I’m asking because I’m wondering if there’s a more efficient way for me to handle my notes at work. Currently I just use a txt file in Notepad++. I use this file to track all of the stuff I have to do, such as tasks for stories I’m working on, next steps for projects, discussions I need to follow up on, questions and...
I finally downloaded F Droid and replaced all the proprietary apps which were a pain to deal with
Not sure how many people were suffering from it, but Google Photos became adamant about pushing ads. I couldn’t find a replacement in Google Store which wasn’t doing the same. Downloaded F Droid, used alternative to website to find apps, downloaded and now the problem is solved. You can use Google Files to install the F...
What are the most mindblowing things in mathematics?
What concepts or facts do you know from math that is mind blowing, awesome, or simply fascinating?...
What do you swear by?
Brand, thing, behavior, method, advice, mantra, etc....
How dare you mention upsides of Wayland or systemd
https://i.imgur.com/KPIo0fP.jpg
Open source Duolingo alternative?
I would like to learn a couple of languages (polish and Japanese - I already learned Spanish to a decent degree) but it seems like every solution is closed source....