Domain name not working in AWS
Updated DNS zone can't be seen from my local network
Is it Possible to Disable Feed and Topics for an Object Completely at Profile Level / Page LayOuts ArrayList vs List I saw this reply from Jon on :     If you want a single collection to   contain multiple unrelated types of   values, however, you will have to use   List&lt;object&gt;   I'm not comparing ArrayList vs List&lt;&gt;, but ArrayList vs List&lt;object&gt;, as both will be exposing elements of type object. What would be the benefit of using either one in this case?  EDIT: It's no concern for type safety here, since both class is exposing object as its item. One still needs to cast from object to the desired type. I'm more interested in anything other than type safety.  EDIT: Thanks Marc Gravell and Sean for the answer. Sorry, I can only pick 1 as answer, so I'll up vote both. In PHP you can do:  print_r($var) or vardump($var)   which prints "human-readible" information about variable.  Is there equivalent functions / helpers for those in Ruby / Rails ? I've got a weird question. Assume that you have a small sample where the dependent variable that you're going to analyze with a simple linear model is highly left skewed. Thus you assume that $u$ is not normally distributed, because this would result in normally distributed $y$. But when you compute the QQ-Normal plot there is evidence, that the residuals are normally distributed. Thus anyone can assume that the error term is normally distributed, although $y$ is not. So what does it mean, when the error term seems to be normally distributed, but $y$ does not? Can I list the resources in a given package? Order of elements in $Z_n$ I have this question:     Let $x, n$ be integers with $n \geq 2$ and $n$ not dividing $x$.  Show that the order o($\bar{x}$) of $x \in Z_n$ is   $o(\bar{x})= \frac{n}{HCF(x, n)}$   I've been thinking about it for ages but I still don't get why. A hint would be appreciated. Intuition behind the Definition of Conditional Probability (for 2 Events) divisibility of binomial coefficients by primes If $p$ is a prime number and $r = 1,2,3 \dots ,p -1$, how can I prove that the binomial coefficients $_nC_r(p,r)$ are divisible by $p$? By divisible I mean $_nC_r(p,r)/p$ leaves remainder $0$.  oivind How can I launch screensaver with a keyboard shortcut? I have a  repository which contains a number of subdirectories. Now I have found that one of the subdirectories is unrelated to the other and should be detached to a separate repository.  How can I do this while keeping the history of the files within the subdirectory?  I guess I could make a clone and remove the unwanted parts of each clone, but I suppose this would give me the complete tree when checking out an older revision etc. This might be acceptable, but I would prefer to be able to pretend that the two repositories doesn't have a shared history.  Just to make it clear, I have the following structure:  XYZ/     .git/     XY1/     ABC/     XY2/   But I would like this instead:  XYZ/     .git/     XY1/     XY2/ ABC/     .git/     ABC/ Given Newton's third law, why are things capable of moving? Cant install via Ubuntu Software- "apt transaction returned result exit-failed" I'm using 17.04 ( Clean Install ), and as far as I remember, every try to install any sofware- it fails with that error code.  I tried sudo apt-get update &amp;&amp; apt-get upgrade and problem persists.  any idea why?   edit: Using software Updater gave this result :   edit : output of update  guy@LG-LAPTOP:~$ sudo apt-get update &amp;&amp; apt-get upgrade [sudo] password for guy:  Ign:1 http://il.archive.ubuntu.com/ubuntu zesty InRelease Ign:2 http://il.archive.ubuntu.com/ubuntu zesty-updates InRelease               Ign:3 http://il.archive.ubuntu.com/ubuntu zesty-backports InRelease             Err:4 http://il.archive.ubuntu.com/ubuntu zesty Release                           503  Service Unavailable Get:5 http://security.ubuntu.com/ubuntu zesty-security InRelease [89.2 kB]      Err:6 http://il.archive.ubuntu.com/ubuntu zesty-updates Release                   503  Service Unavailable Get:7 http://archive.canonical.com/ubuntu zesty InRelease [10.2 kB]             Err:8 http://il.archive.ubuntu.com/ubuntu zesty-backports Release                 503  Service Unavailable Get:9 http://archive.canonical.com/ubuntu zesty/partner Sources [1,416 B]       Get:10 http://archive.canonical.com/ubuntu zesty/partner amd64 Packages [1,616 B] Get:11 http://archive.canonical.com/ubuntu zesty/partner i386 Packages [1,612 B] Get:12 http://archive.canonical.com/ubuntu zesty/partner Translation-en [708 B] Get:13 http://security.ubuntu.com/ubuntu zesty-security/main amd64 DEP-11 Metadata [11.7 kB] Get:14 http://security.ubuntu.com/ubuntu zesty-security/main DEP-11 64x64 Icons [9,219 B] Get:15 http://security.ubuntu.com/ubuntu zesty-security/universe amd64 DEP-11 Metadata [14.4 kB] Get:16 http://security.ubuntu.com/ubuntu zesty-security/universe DEP-11 64x64 Icons [31.0 kB] Reading package lists... Done                                          E: The repository 'http://il.archive.ubuntu.com/ubuntu zesty Release' does no longer have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. E: The repository 'http://il.archive.ubuntu.com/ubuntu zesty-updates Release' does no longer have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. E: The repository 'http://il.archive.ubuntu.com/ubuntu zesty-backports Release' does no longer have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. guy@LG-LAPTOP:~$    output of apt get  guy@LG-LAPTOP:~$ sudo apt-get install putty Reading package lists... Done Building dependency tree        Reading state information... Done The following additional packages will be installed:   putty-tools Suggested packages:   putty-doc The following NEW packages will be installed:   putty putty-tools 0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded. Need to get 661 kB of archives. After this operation, 2,713 kB of additional disk space will be used. Do you want to continue? [Y/n]  Err:1 http://il.archive.ubuntu.com/ubuntu zesty/universe amd64 putty-tools amd64 0.67-3   503  Service Unavailable Err:2 http://il.archive.ubuntu.com/ubuntu zesty/universe amd64 putty amd64 0.67-3   503  Service Unavailable E: Failed to fetch http://il.archive.ubuntu.com/ubuntu/pool/universe/p/putty/putty-tools_0.67-3_amd64.deb  503  Service Unavailable E: Failed to fetch http://il.archive.ubuntu.com/ubuntu/pool/universe/p/putty/putty_0.67-3_amd64.deb  503  Service Unavailable E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? guy@LG-LAPTOP:~$ apt: how to be sure that a specific package gets installed/updated from specific repository and not from the default one? How can one predict whether an individual infected with the SARS-CoV-2 virus will be asymptomatic? According to  , half of the   virus carriers show no symptoms.   What are the biological factors that determine whether an infected individual will be asymptomatic or not? Do the 3 Doctors remember that they saved Gallifrey after 'Day of the Doctor'? I've read several posts and I've seen one that says before it was Eleven's turn to take part in the events of 'Day of the Doctor', Gallifrey was most certainly destroyed, and when it came to his turn he re-wrote history and saved Gallifrey. But I've rewatched 'Day of the Doctor' recently and the War Doctor asks if he'll remember saving Gallifrey and the Doctor says no. So I'm a bit confused, I don't want to think that the War Doctor or the 10th Doctor have lost their memories after saving Gallifrey and their life of saying they destroyed Gallifrey was a lie. So did they really remember? What is the difference between a deep copy and a shallow copy? What is the difference between a deep copy and a shallow copy? In  it says that flagged comments can be handled automatically if flagged repeatedly (3 + (score / 3) flags = deletion). Which is great; mods are busy people.  In , the venerable Bill the Lizard says that if all comments on a post are obsolete, you can flag the post (or one of the comments) with a custom flag saying that they're all obsolete, and the mod can remove them with one fell swoop. Problem is, that requires a mod.  What should I do when some of the obsolete comments are mine? I can't flag my own comments, and I don't like raising custom flags if I can avoid it.  You're wondering why I don't just delete them. There are two scenarios where I don't, at least not immediately:   Someone has commented with incorrect information. In that situation, I reply to the comment telling them how they've got it wrong. (Sometimes, of course, they quite correctly reply telling me how I got it wrong, which is neither here nor there&nbsp;&mdash; we still end up with obsolete comments. :-) ) Frequently, they reply saying "you're right" but (near universally) leave the comment lying around. I can (and do) then comment again saying "Let's clean these up" and flag their comments as obsolete. But I can't flag mine. Nor do I want to remove mine while the incorrect comment is still there; it leaves a confusing situation for anyone coming to the post later. Someone has commented with correct information. In that situation, if appropriate (e.g., the post author isn't busily editing at the same time and I know enough to do it properly), I'll edit the comment into the post and reply with "You're right, edited that in." and flag their comment as obsolete. These are rarely removed by the commenter. And again I can't flag mine.   The first scenario is the more problematic, since I can go back 10-20 minutes later and remove my "edited that in" comment and there's no harm if their comment is still there.  I currently bookmark and check back periodically, but that's labor-intensive and I'd like a better way.  Ideally, I'd want to tie my comment to one I've flagged so that it's deleted automatically if the other one is (by flagging, or by the commenter). That's a fair bit of development, though, I'm guessing.  What should I do? Go with a custom flag saying "The conversation between X and me is now obsolete," even though that means dumping it on a mod? I have a atmega8 that is working with 3.6V dc, I need to control some 12V relays with a not chip (7404), what is the simplest way to do this? I have connected a 12V dc to the relays, so when I connect the relays to the chip and then the atmega8, the current returns to the atmega through the not chip. Is this solution correct? There a better way to do this? What's the "official" explanation for Harry's (and everyone else's) absence from muggle school? Singular or plural following a list