I'm a total regex noob and have been struggling with this problem for a while today. I have some content with urls in them. I'd like to simply extract these urls but I am having trouble selecting up to the end of the url.  I have a code sample here:   As you can see it doesn't select correctly, and the last url is not selected at all. Terrible :/  If anyone could steer me in the right direction I would really appreciate it  Update:  To not depend on the above link alone I thought I'd add the regex here as well. Here is the original regex for this question:  /(?:http|ftp)s?:\/\/\S*\.\S*(?="|&lt;)/gi  Here is the content I am testing with:  Here is some content and url &lt;p&gt;http://www.something.com/index.html&lt;/p&gt; &lt;p&gt;Some more content &lt;a href="http://www.something.com/some/path/here.html"&gt;http://www.something.com/some/path/here.html&lt;/a&gt;&lt;/p&gt; Some more text http://www.something.com/something/somethingelse.html content  continued...
I’m a newbie in Python. I’m learning regexes, but I need help here.  Here comes the HTML source:  &lt;a href="http://www.ptop.se" target="_blank"&gt;http://www.ptop.se&lt;/a&gt;   I’m trying to code a tool that only prints out http://ptop.se. Can you help me please?
Windows Batch recursive delete old files Which race in Star Trek universe was the first to invent Warp technology? Humans look like late member of Warp Drive community. Klingons were capable of interstellar travel from the time of Kahless. Vulcans were in contact with Andorians from ancient times (ST: Enterprise).  Which one first invented warp capabilities: Klingons or Vulcans? Or, others? How to set security options for a PDF using pdflatex My questions is very simple. How can I set security setting for a PDF file created with PDFLatex?  I should set some password or print permissions, etc. How to redirect a URL to a custom IP address? I have an Ubuntu machine that I'm using as my home Internet router.  It uses a USB mobile broadband modem as its Internet connection, and shares this with another router (via the router's "Internet" port) which I use as my LAN.  How do I redirect requests from within my LAN for a given URL to a custom IP address (ex have google.com redirect to x.x.x.x)? Making a WinForms TextBox behave like your browser's address bar When a C# WinForms textbox receives focus, I want it to behave like your browser's address bar.  To see what I mean, click in your web browser's address bar. You'll notice the following behavior:    Clicking in the textbox should select all the text if the textbox wasn't previously focused. Mouse down and drag in the textbox should select only the text I've highlighted with the mouse. If the textbox is already focused, clicking does not select all text. Focusing the textbox programmatically or via keyboard tabbing should select all text.   I want to do exactly this in WinForms.  FASTEST GUN ALERT: please read the following before answering! Thanks guys. :-)     Calling .SelectAll() during   the .Enter or .GotFocus events won't   work because if the user clicked the   textbox, the caret will be placed   where he clicked, thus deselecting all   text.      Calling .SelectAll() during the .Click event won't work because the user won't be able to select any text with the mouse; the .SelectAll() call will keep overwriting the user's text selection.      Calling BeginInvoke((Action)textbox.SelectAll) on focus/enter event enter doesn't work because it breaks rule #2 above, it will keep overriding the user's selection on focus. I'm running an Ubuntu 14.04 and want to install the Eclipse IDE for both Java and C/C++ programming. I installed the separate installation files from their official website. I followed this thread . (The top answer)   The steps helped me install the Java IDE but I don't know what changes I should make to the procedure to install the C/C++ IDE.   Another thread , recommended to install eclipse-cdt but the Eclipse version installed is outdated. (Doesn't allow me to install Pydev)   I have TWO questions:   Can the C/C++ libraries be downloaded from within eclipse, like Pydev? If not, how do I install both IDEs without interfering with each other?   P.S. I commented this query in the first thread but got no reply, that is why I'm asking a fresh question! I've been working with ArcGis for a while now and was wondering if there was a way to change positions of parameters inside the toolbox for the user. The only time I have seen this done in arc toolbox is with the Raster clip tool with the Rectangle parameter where the 4 parameters are aligned in a circle in the toolbox.     I don't know if what I want is possible since I haven't seen anyone else do it. The Frobenius Coin Problem Possible Duplicate:          The square root of a number squared is equal to the absolute value of that number. Why is $\sqrt{x^2} = |x|$? Why not just $x$? Please give me a reason and also help me prove it. Why isn't the center of the galaxy "younger" than the outer parts? I understand that time is relative for all but as I understand it, time flows at a slower rate for objects that are either moving faster or objects that are near larger masses than for those that are slower or further from mass.  So, the illustrative example I always see is that if I were to leave earth and fly around at near light speed for a while or go into orbit around a black hole the time I experience would be substantially shorter than for those I left behind at home on earth and I'd come back to find that I've only aged however long I felt I was gone by my own clock but that on Earth substantially more time would have elapsed.  Following through on this model, the stars in orbit around the black hole at the center of the Milky Way are aging much much slower (relative to us), right?  So does it not follow that the center of the galaxy is some appreciable (I have no idea how to go about putting this in an equation so will avoid guessing at the difference) amount "younger" than the stuff further away from the center?   If this is not true, could someone please explain why not, and if it is true, can someone please point me to where I can calculate the age of the center of the galaxy :-)  And to be clear... what I'm asking is... if there was an atomic clock that appeared at the center of the galaxy when the center was first formed, and we brought it through a worm hole to earth today - how much time would have elapsed on that clock vs. the age we recon the galaxy currently is? (13.2 billion years) Sci-fi novel involving living forever through teleporter copies Formula for completing the square? My math teacher said that this was the formula for completing the square.  Original function: $$ax^2 + bx + c$$ Completed square: $$a\left(x + \frac{b}{2a}\right)^2 - \frac{b^2}{4a} + c$$  However, using this formula I'm not getting the same answers that I would get just by determining the stuff myself.  Is this correct? Need a proofreading why all the units are satisfied $a^2-2b^2 =\pm1$ for $\mathbf{Z}[\sqrt{2}]$ All the units are satisfied Pell's equation $a^2-2b^2=\pm1$  for $\mathbf{Z}[\sqrt{2}]$, $a,b\in\mathbf{Z}$.  Here is my proof:  Let $a+b\sqrt{2}$ be a unit $\in\mathbf{Z}[\sqrt{2}]$. This implies $$(a+b\sqrt{2})(c+d\sqrt{2})=1, c+d\sqrt{2}\in\mathbf{Z}\sqrt{2}$$ $$\implies \mathrm{norm}((a+b\sqrt{2})(c+d\sqrt{2}))=1$$ $$\implies \mathrm{norm}(a+b\sqrt{2})\cdot \mathrm{norm}(c+d\sqrt{2})=1$$ $$\implies (a+b\sqrt{2})(a-b\sqrt{2})(c+d\sqrt{2})(c-d\sqrt{2})=1$$ $$\implies (a^2-2b^2)(c^2-2d^2)=1$$ $$\implies \left[ a^2-2b^2=1\text{ and } {c}^2-2{d}^2=1\right]\text{ or } \left[ a^2-2{b}^2=-1\text{ and }{c}^2-2{d}^2=-1\right]$$ $$\implies {a}^2-2{b}^2=\pm1$$ I'm looking at buying a second-hand Mac, probably one that does not include an OS installation disk.  How can I scan it to make sure that it has not had security threats installed on it?  Is there a CD or DVD image I can boot it up with to perform this scan offline?  Edit: prospective machine would be a 2011- or 2012-vintage MacBook Pro.  Also note that I don't have reliable access to high-speed internet, so solutions that involve downloading 5GB over the Internet are not ideal.  For others, though,  may be helpful. Who was the piano player that Starbuck met in the bar on Galactica? Towards the end of season four, Starbuck meets a piano player in the makeshift bar on Galactica.  Now, it appears that this guy is some kind of ghost/angel like Caprica-6 and the ghost Baltar - but I have an idea that he could also be the original copy of the seventh model (Daniel). It's mentioned right in the episode before that Cavil poisoned all of the bodies that were being prepared to accept a copy of Daniel - but it's ambiguous about the fate of the original cylon with that personality. Daniel was also mentioned as an 'artist' and 'sensitive' person.  So - could it have been Daniel that helped Starbuck realise what the music meant? How can I take screenshots of YouTube videos in full screen? Validate/verify PDF files integrity How to get reflections from 3D to show up on real images Andrew Price released a nice tutorial on how to nicely put 3D objects on top of a real image:   I have seen images, such as this:  which have 3D elements over images and have actual reflections from the object showing up on the wet asphalt.  How can this effect be achieved using render passes (or any other way)?  Here is another example (from ): What happened to the link to the duplicate when a question is closed as a duplicate? Possible Duplicate:          This question:      has been closed as an exact duplicate, but there is no link to the duplicate so we can neither assess whether the closure is valid nor see the explanations in the duplicate question.  It wasn't so long ago that the duplicate links were shown &mdash; is there a policy change (and if so, why?), or is it just a glitch? How to install and use CDI on Tomcat?