How the strings concatenation take place in C# for var q = "A" + "B" + "C"
How many String objects will be created when using a plus sign?
Why does the aorta spray blood when atmospheric pressure is higher than blood pressure? Send Gmail calendar invite from alternate email optexp environment error when compiling with XeLaTeX I have troubles with optexp environment. There is a code  \documentclass[pstricks,margin=12pt]{standalone}  \usepackage{pst-optexp}  \begin{document} \begin{pspicture}(3.2,5) \pnodes(0,3){A}(1,3){BS}(3,3){M1}(1,5){M2}(1,1){PD} \psset{mirrortype=extended, mirrordepth=0.2}  \begin{optexp} \beamsplitter[bsstyle=plate, compname=BS](A)(BS)(PD) \mirror[compname=M1](BS)(M1)(BS) \mirror[compname=M2, variable](BS)(M2)(BS) \lens[compname=L](BS)(PD) \optdetector[compname=Det, dettype=diode](BS)(PD) \addtopsstyle{Beam}{beamwidth=0.2, fillstyle=solid,fillcolor=green!20!white} \drawwidebeam(A){BS}{M1}{BS}{M2}{BS}{L}{Det} \end{optexp} \end{pspicture}  \end{document}   and the result is this    and I get "MiKTeX GPL Ghostscript 9.19: Unrecoverable error, exit code 1" error. When I remove optexp environment, so  \documentclass[pstricks,margin=12pt]{standalone}  \usepackage{pst-optexp}  \begin{document} \begin{pspicture}(3.2,5) \pnodes(0,3){A}(1,3){BS}(3,3){M1}(1,5){M2}(1,1){PD} \psset{mirrortype=extended, mirrordepth=0.2}   \beamsplitter[bsstyle=plate, compname=BS](A)(BS)(PD) \mirror[compname=M1](BS)(M1)(BS) \mirror[compname=M2, variable](BS)(M2)(BS) \lens[compname=L](BS)(PD) \optdetector[compname=Det, dettype=diode](BS)(PD) \addtopsstyle{Beam}{beamwidth=0.2, fillstyle=solid,fillcolor=green!20!white} \drawwidebeam(A){BS}{M1}{BS}{M2}{BS}{L}{Det}  \end{pspicture}  \end{document}   the result is     which is correct but optical components are behind beam. I use XeLatex. What am I doing wrong? Which packages are missing? Thank you (example is from manual "Drawing optical experimental setups" where the code works correctly). Where should I put software I compile myself? What does the "@" symbol do in SQL? I was browsing through the questions and noticed this:  SELECT prodid, issue FROM Sales  WHERE custid = @custid  AND datesold = SELECT MAX(datesold)               FROM Sales s               WHERE s.prodid = Sales.prodid                   AND s.issue = Sales.issue                   AND s.custid = @custid   I was wondering what the "@" does in front of custID?  Is it just a way of referencing the custID from the table being selected? What is the correct definition and usage of "for all I know"? I saw some sentences using this phrase "for all I know" but wasn't quite sure what is its exact definition and also whether a modal verb such as "could, may or might" expressing uncertainty must be present in the sentence.  The following are some possible definitions:   According to the information I have; I think; probably. (usually implies uncertainty) Based on what I know (usually expressing displeasure)  As far as I know (used to show indifference)  I really don't know (used to show complete ignorance)    And these are statements containing the phrase:   For all I know, the mayor has resigned already. She may have gone to town for all I know. He wears a ring, but he may be single, for all I know. For all I know, there may be someone with you now. The man I met on the beach yesterday seemed friendly, but he could be a thief, for all I know. For all I know, the girl was buried alive in the Arabian sands. They've decided to hire Jack for all I know.   References:        What does the phrase "for all I know" mean exactly? Removing minimize/maximize buttons in Tkinter Not every boolean function is constructed from $\wedge$ (and) and $\vee$ (or) android - out of memory exception when creating bitmap Raising a decimal to a power of decimal? The .net framework provides in the Math class a method for powering double. But by precision requirement I need to raise a decimal to a decimal power [ Pow(decimal a, decimal b) ]. Does the framework have such a function? Does anyone know of a library with this kind of function? I would like to know: How come that  $$\sum_{n=1}^\infty n x^n=\frac{x}{(x-1)^2}$$  Why isn't it infinity? ASP.NET Stress Testing Is there a way to test an application where you simulate a hundred different clients connecting to a IIS server and asking the same data? At the customer where our project is running they have 400 computers and they often do stress tests with all computers. I on the other hand have only got my laptop... (and a development server).  (In my case the data is asked through a WebORB Gateway). If you draw two cards, what is the probability that the second card is a queen? We had this question arise in class today and I still don't understand the answer given. We were to assume that drawing cards are independent events. We were asked what the probability that the second card drawn is a queen if we take two from the deck. The answer given was 4/52, which seems counter-intuitive to me. How is the probability still 4/52 if there was a card drawn before it? What if the first card drawn was a queen? How to install Windows 7 from the network? Is it possible to install Windows 7 (Current RTM Version) on a computer without using removable media like DVD or USB?  The first thing that comes to my mind is through the network, but I don't have experience of doing a fresh install of Windows 7 via the network.  How to install Windows 7 via the network without any removable media?  P.S. I know some may think that doing so, is just a waste of time and it's easier to do it with removable media, but in the current situation the target PC neither has CD/DVD Drive nor supports booting from USB. And in addition to that, the target computer is connected to the network via a wireless connection (I don't know if it will cause any problems with the installation). My problem is that I have only one reference. So I would like the head of this part to appear "Reference" instead of commonly "References". More generally, could we change the title "References" to an arbitrary name?  Thank you very much for your help! Blurring/Feathering a Procedural Pointiness Mask I'm trying to create a procedural mask to affect the sharp edges of my model using the Pointiness output from the Geometry node, leading to the eventual idea of using it to create customisable weathering effects, such as .  This is the base setup that I've got so far.   How is it possible to blur/feather the black edges of the mask so that they would essentially expand across the object until the whole object is rendered black?   I've had a look at both of the go-to texture blur methods suggested for cycles found  and  however these seem to rely on there being a vector input/output for the texture, which is not the case in my example.  The Procedural Cracks tutorial by CGMasters came closest to what I was trying to achieve with the 'Worn Edges' section of the , but I didn't have any success trying to convert it to my situation.  Any ideas would be massively appreciated! :)  EDIT: Not sure if it was clear enough from the description but I'm trying to steer clear of baking/UV-Unwrapping/the Works on this one... Purely procedural :)  UPDATE: I've made a couple of updates to the shader which has given me slightly better results, although it's still not quite there and the mask blur/expansion issue is still not successful.  This is what it now looks like:   The issue is now coming from the grey values of the mask 'leaking' out across the whole mesh and not stemming from the black values... if that makes sense? :P   In researching weathering effects in blender, I stumbled across , which is exactly what I want to achieve?  UPDATE 2: Still no luck achieving the desired effect in the gif, however I feel I'm slightly closer from adding another colour ramp node after the previous ones.    Does anyone have any more ideas?  UPDATE 3: Found a working solution, added an answer below if people are interested :) What does the term "86'd" relate to? What does it mean when someone or something is referred to as being "86'd"? I forgot the passcode for my iPad restrictions. How can I disable them? javax.faces.application.ViewExpiredException: View could not be restored How to invoke vim editor and pipe output to bash