What idiom would one use to show fake sympathy other than crocodile tears
Is there another saying/idiom similar to crocodile tears?
Remotely changing hard drive boot order, windows 7 I have one workstation chassis with two hard drives.  Depending on which one I boot from, I get one of two different operating systems: both are windows 7, but they have different static IPs, serve totally different purposes, etc.    The workstation has a modern asus motherboard, core i7 intel CPU, 32 GB ram.   Is there a way to remotely change which hard drive is booted from on a reboot?  Both systems have remote users, and i'd like a solution that is more elegant than being physically present and selecting boot order manually. I am aware of the die() command in PHP which exits a script early.  How can I do this in Python? Is the reason why the time evolution operator is unitary based on purely physical arguments, i.e. that the physical processes that an isolated system undergoes shouldn't depend on any particular instant in time (homogeneity of time); thus two experimenters who conduct the same experiment starting from the same initial state, but at different times, should have the same probability amplitude for that state?! Or is there some mathematical argument as well?  Also, is the reason why the time evolution operator is linear implied by the superposition principle (as an arbitrary state can be expressed as a linear combination of basis states the operator should act linearly as otherwise the state as a whole would evolve differently to the superposition of states that it was initially represented by)?! Should I use the singular or plural verb in mathematical formulae ("Two and two make/makes four")? I read this sentence on an educational website:     Now times have changed and you are ready for situations involving forces in two dimensions.   Shouldn't there be a comma before and, since the subject of the sentence has changed (things vs. you)?      Now times have changed, and you are ready for situations involving forces in two dimensions.   What is the exact comma rule for joining two clauses with and? How can I trigger a command when a player is hit by a Snowball? I am trying to make a snowball that triggers a command when it hits a player in 1.15, but I don't know how to do that. When I do execute at @e[type=snowball] run gamemode spectator @a[distance=..2] it only runs the command if it goes right next to them. Constants of motion vs. integrals of motion vs. first integrals Since the equation of mechanics are of second order in time, we know that for $N$ degrees of freedom we have to specify $2N$ initial conditions. One of them is the initial time $t_0$ and the rest of them, $2N-1$ are initial positions and velocity. Any function of these initial condition is a constant of motion, by definition. Also, there should be exactly $2N-1$ algebraically independent constants of motion.  On the other hand, Noether's procedure gives us integrals of motion as a result of variational symmetries of the action. These integrals of motion are also conserved but they are not always $2N-1$ in number. In consequence, we classify the system by their integrability.  So, what is the difference between the  and ? Why do non- have less integrals of motion when they should always have $2N-1$ constants of motion? SSH in shell script with password Suggested edits in top-bar put flags over the winterbash snowflake Suggested edits in the top bar put the flag count right over the winterbash snowflake. Looks pretty ugly if you ask me... What does the 'rc' in `.bashrc`, etc. mean? Well, this is embarrassing. I feel like I just realised I don't know a loyal colleague's name after working with them for 10 years. "Hey, er... *cough!*, thanks for that great job you did on setting my aliases this morning..."  What do the letters rc signify in .bashrc, .kshrc, etc.?  If you know, please cite sources.  Even if you don't know, I'd also welcome unfounded assumptions, suggestions or alternatives if they're marked as such. Why do we care about eigenvalues of graphs?  Of course, any novel question in mathematics is interesting, but there is an entire discipline of mathematics devoted to studying these eigenvalues, so they must be important.  I always assumed that spectral graph theory extends graph theory by providing tools to prove things we couldn't otherwise, somewhat like how representation theory extends finite group theory.  But most results I see in spectral graph theory seem to concern eigenvalues  not as means to an end, but as objects of interest in their own right.  I also considered practical value as motivation, e.g. using a given set of eigenvalues to put bounds on essential properties of graphs, such as maximum vertex degree.  But I can't imagine a situation in which I would have access to a graph's eigenvalues before I would know much more elementary information like maximum vertex degree.  (EDIT: for example, dtldarek points out that $\lambda_2$ is related to diameter, but then why would we need $\lambda_2$ when we already have diameter?  Is this somehow conceptually beneficial?)     So, what is the meaning of graph spectra intuitively?  And for what practical purposes are they used?  Why is finding the eigenvalues of a graph's adjacency/Laplacian matrices more than just a novel problem? How to get a JavaScript object's class? The question is to show that for any $x,y \in\Re^n$  $||x+y||\cdot||x-y||\le||x||^2+||y||^2$  with equality if and only if $\langle x,y \rangle= 0.$  I have that $||x+y||^2=||x||^2+2 \langle x,y \rangle+||y||^2$ , which helps me prove equality but I'm lost on how to show this and show that the inequality part. How to get file extension from string in C++ Given a string "filename.conf", how to I verify the extension part?  I need a cross platform solution. Communicating with all potential clients as a multi niche photographer This may be seen as a bit off topic, but I'm hoping it's a question that some photographers can associalte with and clear up for me.  I'm an amateur wanting to get more serious in the new year, and aiming to build up a portfolio of work that I will showcase on my own website, which will hopefully build up a client base.  I figured that a good way to get started would be to create a few 365 style projects that I can publish on my site and on social media. However, my interests vary a great deal, and therefore my photography will more than likely range from nature and local events, to more NSFW style topics.  My problem is, how to successfully communicate with people who will be interested in certain aspects of my work, without losing touch with those interested in others.  In theory, I'd like to set up a single social media presence, preferably Twitter, where I can freely post anything I want, and connect with anyone I want. Essentailly pointing people in the direction of whatever content they will be interested in. Problem is, social media sites like Twitter publicise ALL of your posts to ALL of your followers, so people who are following for nature/local photography will possibly unfollow me for my NSFW content. At the same time, some SFW followers may be potential clients in other areas, and vice versa.  So as a multi niche photographer, how can you engage with all potential clients, and showcase all portfolio peices ( in my case all 365 project shots ) via a single or limited number of social networks? How are you doing it? How to add item to right-click menu when NOT selecting a folder or file? How do I add a menu item to my context menu to open up powershell (or any other arbitary application) when I right-click inside Windows Explorer?  I found tons of links on how to add menu items when doing this: (selecting a folder; )    ...but couldn't find any instructions on how to add menu items when doing this: (not selecting a folder or file)    I did find  and tried adding powershell to HKEY_CLASSES_ROOT\Directory\Background\shell\, (loosely based on the  and linked above) but it didn't work for me.  I'm running Windows 7, by the way.  Also, I'm currently interested in adding only PowerShell, but I'd prefer a general solution I can apply to add any program to the context menu. I am creating a GUI frontend for the Eve Online API in Python.  I have successfully pulled the XML data from their server.  I am trying to grab the value from a node called "name":  from xml.dom.minidom import parse dom = parse("C:\\eve.xml") name = dom.getElementsByTagName('name') print name   This seems to find the node, but the output is below:  [&lt;DOM Element: name at 0x11e6d28&gt;]   How could I get it to print the value of the node? How can I combine hashes in Perl? What is the best way to combine both hashes into %hash1?  I always know that %hash2 and %hash1 always have unique keys.  I would also prefer a single line of code if possible.    $hash1{'1'} = 'red'; $hash1{'2'} = 'blue'; $hash2{'3'} = 'green'; $hash2{'4'} = 'yellow'; Which graphics formats can be included in documents processed by latex or pdflatex? How do I escape a single quote ( ' ) in JavaScript?