Why two EOF needed as input?
Canonical vs. non-canonical terminal input
Time Manager (QGIS) date format I've been through associated answers but cannot quite seem to find something which works!  I'm having trouble getting TimeManager to recognise a simple data field (this is in QGIS2 - but I've had this error in earlier versions). I have these fields formatted in what appears to be one of the acceptable formats:    ... here is a screenshot of the field properties:    The format appears to be recognised in QGIS as I've worked out days difference between two dates (the "Time on Market" field shown in the image).  However ... I always end up with:   The Twitter.shp file works fine as a test, so I don't think this is an issue with the install / phyton conflict.  Any thoughts welcome! Why is $L^{\infty}$ not separable? Ubuntu Software (Software Center) Crash - Ubuntu 16.04 Killing form on $\mathfrak{sp}(2n)$ I have the same question as  from a long time ago. Is there an easy way to see that the Killing form on $\mathfrak{sp}(2n)$ is $\kappa(x,y) = (4n+2) \mathrm{tr}(xy)$?  For example, the Killing form for $\mathfrak{sl}(n)$ can be found from the easier to calculate case of $\mathfrak{gl}(n)$ using the decomposition $$\mathfrak{gl}(n) = \mathfrak{sl}(n) \oplus \mathbb{C}.$$ I don't know a similar argument for $\mathfrak{sp}(2n)$ though. A floor is paved with rectangular marble blocks,each of length $a$ and breadth $b$.A circular block of diameter $c(c&lt;a,b)$ is thrown on the floor at random.Show that the chance that it falls entirely on one rectangular block is $\frac{(a-c)(b-c)}{ab}$  I thought over this problem,i found total number of cases as area of rectangular marble block,but i cannot find the favorable number of cases.Favorable number of cases cannot be area of rectangular marble block$-$ area of circular block,as the answer suggests.What should be the correct logic,please help. Add/Show comments focuses text box by default If I open a post using the mobile theme, which has many comments, there is a link at the footer "add/show n more comments". If this link is clicked, the comments are loaded and displayed.   At the moment the text area is automatically focused which is not a great experience (in my opinion), as you have to close the editor and scroll back to the top if you just wanted to read the comments, without adding a new one.  Would it be possible to either   not focus the text area by default and to load only the comments add a new link for adding a comment Entry to The US before 30-day grace period for student visa The F student visa allows me to enter the US up to 30 days before the program starts. For starting to set up things it is of my interest to arrive sooner than that. How hard is it to travel there beforehand with a tourist visa (waiver) and leave to, say Mexico, to then re enter on a proper date within the 30 days with the student visa? This seems easier than requesting for a status change inside the US from tourist to student.. So this has puzzled me for many a year... I still am no closer to coming to a conclusion, after many arguments that is. I don't think it can, others 100% think it will.   If you have a plane trying to take off whilst on a tread mill which will run at the same speed as whatever the planes tires rotation speed is will it take off?  [edited to be more clear]  The question is simple. Will a plane take off if you put this plane onto a treadmill that will match whatever speed the plane wheels are moving at. So the plane should not be able to move.  This is a hypothetical situation of course. But I am very interested. Why is the de-facto standard sigmoid function, $\frac{1}{1+e^{-x}}$, so popular in (non-deep) neural-networks and logistic regression?   Why don't we use many of the other derivable functions, with faster computation time or slower decay (so vanishing gradient occurs less). Few examples are . One of my favorites with slow decay and fast calculation is $\frac{x}{1+|x|}$.  EDIT  The question is different to  as I'm only interested in the 'why' and only for the sigmoid. Do natural weapons count for two weapon fighting? Do natural weapons such as those granted by being a Tabaxi or an Aarakocra count for the purposes of two weapon fighting? Would they have the light property to allow it and if not what about if you take the dual wielder feat that removes the restriction on them being light?  From a logical perspective I would think claws or talons would be light enough to count and with them being "natural weapons" this means they are definitely weapons so it would make sense for them to be considered light and one handed. How can I remove excess fat from stews or soups without refrigerating? I'm trying to debug a Python script by placing a print("foo=" + foo) statement in my code.  But where does the output appear?     It doesn't appear on the Python Console, and it doesn't appear on the area that appears when you drag the lower edge of the infobar downwards (what is the name for this area? My script errors show up in red here.) When does Ubuntu 16.04 use /etc/apache2/ssl/apache.crt? I have some Ubuntu 16.04 server running and set up one vhost in apache2 which uses (or should use) ssl.  &lt;IfModule mod_ssl.c&gt;         &lt;VirtualHost *:443&gt;          ServerAdmin myemail@mailhoster.xx         ServerName my.domain.name.de         DocumentRoot /var/www/mysslsite          &lt;Directory /var/www/mysslsite&gt;                 Options FollowSymLinks MultiViews                 AllowOverride All                 Order allow,deny                 allow from all         &lt;/Directory&gt;          ErrorLog ${APACHE_LOG_DIR}/mysite.ssl.error.log         CustomLog ${APACHE_LOG_DIR}/mysite.ssl.access.log combined          &lt;/VirtualHost&gt; &lt;/IfModule&gt;   I did NOT enable the standard sites-available/default-ssl.conf.  I am able now to browse to  and it is asking in firefox to add some exception which is totally normal if i did not buy any certificate.  But I was wondering where it is set up that it should use the certificates in /etc/apache2/ssl/ directory. I can not find any config where it is told to use that. I all the time was thinking that it will use something from /etc/ssl folder.   Or did I maybe not activate SSL correctly? I'm fairly new to DMing and so is my group, so we are all on a learning curve together. We're playing D&amp;D 5e.  Last week a fighter in our group tamed a wolf with Animal Handling and then requested that he keep the wolf. I allowed this, but now I'm not sure about how to play the wolf.  Specifically, how can he train the wolf to perform certain actions such as attacking?  What other things might I need to be aware of with a PC owning a "pet"? What character / attack / stage combination can get me a combo of 100? For the first two challenge panels, I just used my golden hammers on the "get a combo of x," but now I'm seeing on challenge panel 3, the game expects you to get a combo of 100! I can barely get past a combo of 9 without the counter resetting. What character / stage combination can get you a combo of 100? Are there multiple, so I can more easily get the "get a total combo of 400 across all characters" challenge?  Additionally, what exactly constitutes a combo? Sometimes my combos are cut short and sometimes they're longer, so I must not understand how they're tracked. Finding largest file recursively I am trying to find the largest file in a directory recursively. If there is a subdirectory inside of that directory the function needs to go inside that directory and check to see if the largest file is there. Once the largest file is found the output is displayed with the relative path name and the name and size of the largest file.  EX:  dude@shell2 (~...assignment/solutions) % bash maxfile.sh ~/test class/asn dude.h.gch: 9481628   This is what I have:  #!/bin/sh clear  recursiveS() {     for d in *; do         if [ -d $d ]; then             (cd $d; echo $(pwd)/$line; du -a; recursiveS;)         fi     done } recursiveS   I have been stuck for a while now. I cannot implement this by pipelining a number of existing Unix tools. Any ideas would be nice! How to detect if JavaScript is disabled? There was a post this morning asking about how many people disable JavaScript. Then I began to wonder what techniques might be used to determine if the user has it disabled.   Does anyone know of some short/simple ways to detect if JavaScript is disabled? My intention is to give a warning that the site is not able to function properly without the browser having JS enabled.   Eventually I would want to redirect them to content that is able to work in the absence of JS, but I need this detection as a placeholder to start. Why does the Community user have votes cast? If Community is a background process and not a real person then why does its profile show that it has votes cast, and how does it cast them?  How can it decide which answers to upvote or downvote?  See the massive number of upvotes and downvotes cast in its profile: Continuous probability distribution with no first moment but the characteristic function is differentiable I am looking for an example of a continuous distribution function where the first moment does not exist but the characteristic function is differentiable everywhere.  Cauchy distributions do not fulfill this, as their characteristic functions are not differentiable at $0$. Does anybody here have an example? At work today, I came across the volatile keyword in Java. Not being very familiar with it, I found . Given the detail in which that article explains the keyword in question, do you ever use it or could you ever see a case in which you could use this keyword in the correct manner?