symbols

I'm running into a Go behaviour which I don't understand. My idea is to import a plugin which implements an interface that is out of both packages. If a struct is returned it works fine, but to be sure it implements the interface, I want to return an interface which fails. Interface definition: package iface type IPlugin interface{ SayHello(string) SayGoodby(string) WhatsYourName() string } The main program looks like this: package main import ( "plugin" "plugin_test/iface" "errors" "fmt" ) //go:generate go build -buildmode=plugin -o ./pg/test.so ./pg/test.go func main(){ path := "pg/test.so"

I ahve a problem with a code below: ProgrammSettings.h #pragma once static class ProgrammSettings { public: static int fd; }; Settings.cpp #include "ProgrammSettings.h" static bool LoadSettings() { ProgrammSettings::fd = 2; // here error Unresolved symbol!! return true; } What i'm doing wrong? Thanks! Unlike instance variables that require only a declaration, static member variabs of the class must also be defined . Currently, your code contains only a declaration. Add a definition of your static fd variable to a cpp file to fix the error: int ProgrammSettings::fd; You need to add the

I have a C++ class that is declared and implemented in a header file. I chose this because one cannot easily move between Debug and Release builds due to _GLIBCXX_DEBUG and precompiled libraries. For example, if I define _GLIBCXX_DEBUG , Boost will crash due to ABI changes in the source files. The header only implementation has created a problem with duplicate symbols. For example, in the class below operator== and non-member swap will produce multiply defined symbols. // Foo.hpp namespace Bar { template class Foo { ... }; bool operator==(const Foo& a, const Foo& b) { .. } } namespace std {

I was wondering what the character code of the square root symbol is in java? That is, I want to be able to print a square root sign on screen inside a string of other characters, or as the label on a button. Take a look at the Unicode character charts at http://www.unicode.org/charts/ See also http://www.google.com/search?q=square+root+character - you might find what you're looking for as the very first hit... DaMainBoss I am sure it's \u221A . Try it out or try googling it, and you might end up with something else (I mean a list of others). EDIT: This would be helpful --> https://www

I'm calling File.ReadAllText() in a program designed to format some files that I have. Some of these files contain the ® (174) symbol. However, when the text is being read, the returned string contains � (65533) symbols where the ® (174) should be. What would cause this and how can I fix it? This is likely due to a mismatch in the Encoding . Use the ReadAllText overload which allows you to specify the proper Encoding to use when reading the file. The default overload will assume UTF-8 unless it can detect UTF-32. Any other encoding will come through incorrectly. David Most likely the file

I am struggling trying to plot Greek symbols as axis labels. Due to for looping several plots with different scales, I would like to use a vector that contains the symbol name instead of using the symbol name within expression() , which works fine: x <- rnorm(10, 5,6) y <- rnorm(10, 2,1) xlab <- expression(paste(mu, "mol/mol")) plot(x,y, xlab = xlab) For some reason, I can't replace "mu" with a vector containing the symbol name: k <- "mu" xlab <- expression(paste(get(k), "mol/mol")) plot(x,y, xlab = xlab) I found a similar question , but what worked for functions does not seem to work for