Getting wrong output when checking if 2 date periods overlap
Determine Whether Two Date Ranges Overlap
Plotting an epicycloid I have two raster files that are the same cell size but I cannot get them to align properly. (I want the black to line up with the pink)    When creating the black raster file (from using polyline to raster), I imported the pink raster in the Snap Raster section in the Environments setting. I thought that Snap Raster was supposed to make it line up?  Am I doing something wrong or is it a bug in Arc (I remember reading that this was a problem about two years ago), and if it is a bug is there a work around?  I have also read there is a Raster Shift, but I'm not sure what to enter in the X Coordinate and Y Coordinate. Since I only want the black raster to shift down, I know that the X Coor = 0 and the Y Coor should be negative something, but what are the units?  Thanks. Would anyone can help me how to show that a finitely generated projective module over a local ring and PID are free?    What I know about a finitely generated projective module $M$ over a PID $R$ is isomorphic to $R^k\oplus R/(a_1)\oplus\dots\oplus R/(a_n)$, and for the local ring case I don't know how to start. Variable importance from GLMNET There have been a number of cases where I would like to thank someone for providing me with a thorough response and give them feedback beyond the vote up. Often I wish people would tell me why they voted me up. Not that the thank you part is necessary but it sets it apart from the other comments related to answering the question itself.  In this type of situation is a "Thank you" acceptable in a comment?     For more information, see  in the . Is it acceptable to vote to close a question without leaving a comment? Although  is obviously an exceptionally poor question, it still amazes me that 5 people can vote to close and yet not one of them leave a comment to help explain how the poster can improve their question.  I see loads of similar examples where questions from new users are closed and heavily voted down without anyone taking any effort to explain why - not a pleasant experience for new users.  Is there anything that can be done to encourage users to leave comments when voting to close? Problems with FOUC What mechanism is responsible for the creation of these dunes on Comet 67P/Churyumov-Gerasimenko?  The following high resolution picture from ESA's Rosetta mission shows the dunes:       At a distance of 7.8 km from the surface, the image scale is about   66.5 cm/pixel, so each 1024 x 1024 pixel frame is about 680 m across (although if we assume the furthest point away is an additional ~1 km   further from the centre, the image scale is about 92 cm/pixel).   So the scale of the dunes is on the order of tens of meters along the crest. And each crest are probably just a few meters apart. Reduce gap between subfloat and subcaption How to check if file exists on FTP before FtpWebRequest How To Use DateTimePicker In WPF? I have no idea how to use the DateTimePicker control in WPF. It is not available in the Toolbox. Saving memoization to disk Why must a planet be in a star's "habitable zone" to have life? Haar measure on $SO(n)$ I am interested in describing the group of special orthogonal matrices $SO(n)$ by a set of parameters, in any dimension. I would also like to obtain an expression of the density of the Haar measure in this set of parameters. Could anyone help me on this or indicate a good reference? Thanks Why do I have the "required reviews completed" status on my submission in Elsevier? I had submitted my paper in an Elsevier journal one year back. Now, status update on the submission tracking says "Required reviews completed." However, for the last two weeks still there is no change in the status.  Should I ask the editor what is going on with my submission? How do I change file permissions on a FAT32 drive? TikZ: turning edges into arrows using "child" notation I'm using TikZ for the first time to draw a simple Kripke model, and I'm using the child notation to produce new nodes. How can I turn my edges into arrows?  \begin{tikzpicture}   \node [circle,draw] (q0) {}   child {node [circle,draw] (q1) {$p$}     child {node [circle,draw] (q4) {$p$}       child {node [circle,draw] (q7) {$p\land q$}}       child {node [circle,draw] (q8) {$p\land q$}}       child {node (q9) {} edge from parent[-&gt;, dashed]}}     child {node [circle,draw] (q5) {$q$}}     child {node (q6) {} edge from parent[dashed]}}   child {node [circle,draw] (q2) {$p$}}   child {node (q3) {} edge from parent[dashed]}; \end{tikzpicture}   I know how to change the color or thickness of all edges by passing an option at the beginning of \begin{tikzpicture}, but I can't turn them into arrows.   Also, while we're at it, is there a way to label these edges? Or am I left with simply using node notation for all my nodes?  Thanks for all your help, Piotr How do I get my device detected by ADB on Linux? I just got my shiny new Wileyfox Swift – and before putting it to use I want to oem unlock and root it (as I usually do with new devices ;) Trouble is, though  is enabled on the device, and a corresponding line in /etc/udev/rules.d/51-android.rules exists, the device is not seen by adb devices.  I know there are several answers scattered around this site, but they are either hard to find, just cover a specific device, or don't cover all steps I finally needed. So I take this as a chance for a canonical, device-independent question and give it a detailed answer below:  How can I get my Android device seen and used by adb on Linux? I can't (vote to) close a question I voted to close before but then retracted? For example...  I closed a vote for 'too broad'. But then I realized I wanted to close it as a specific duplicate of another question instead. So I retracted my close vote.  That worked. But I can't now vote to close as duplicate and the title says I already voted to close.  Maybe this is intentional but it doesn't feel that way. I found the .bashrc file and I want to know the purpose/function of it. Also how and when is it used?