alias

Below is excerpted from gsl.h of Microsoft's gsl library ( https://github.com/microsoft/gsl ): namespace gsl { // // GSL.owner: ownership pointers // using std::unique_ptr; using std::shared_ptr; template<class T> using owner = T; ... }; I cannot understand what the following alias template means: template<class T> using owner = T; Any explanations? It means that for every T , owner<T> is an alias for T . It can be used as annotation to show which pointers are 'owner' ie: Example of non owning raw pointer template<typename T> class X2 { // ... public: owner<T*> p; // OK: p is owning T* q; //

I have a query like this: select a1.name, b1.info from (select name, id, status from table1 a) as a1 right outer join (select id, info from table2 b) as b1 on (a1.id = b1.id) I only want to include everything where a1.status=1 and since I'm using an outer join, I can't just add a where constraint to table1, because all info from table2 that I want to be excluded will still be there, just without the name. I was thinking something like this: select z1.name, z1.info from ((select name, id, status from table1 a) as a1 right outer join (select id, info from table2 b) as b1 on (a1.id = b1.id)) as

Let's have a following example: public class X { } public class Y { } public class Z { } public delegate IDictionary<Y, IList<Z>> Bar(IList<X> x, int i); public interface IFoo { // ... Bar Bar { get; } } public class Foo : IFoo { // ... public Bar Bar { get { return null; //... } } } void Main() { IFoo foo; //= ... IEnumerable<IList<X>> source; //= ... var results = source.Select(foo.Bar); // <- compile error here } The compiler says: The type arguments for method 'System.Linq.Enumerable.Select(System.Collections.Generic.IEnumerable, System.Func)' cannot be inferred from the usage. Try

I'm not sure why but my Bash aliases don't seem to work. Here is my .bashrc file # v 0.0.1 - 7/03/12 [[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM into a shell session *as a function* PATH=$PATH:$HOME/.rvm/bin # Add RVM to PATH for scripting # expanding history to 10000 commands export HISTSIZE=10000 # don't store repeated commands more than once export HISCONTROL=ignoredups # where to look for Java export JAVA_HOME=/Library/Java/Home # tomcat server configuration export CATALINA_HOME=/usr/local/apache-tomcat-6.0.35 # default editor export EDITOR=vim if [ -f ~

If I fail to explicitly call exit for certain function-based Bash scripts then there are additional unexpected executions for some functions. What is causing this? The behavior was first noticed while making a git alias as part of answering another user's question on StackOverflow . That alias was composed of this script ( which runs the function twice instead of once ): #!/usr/bin/env bash github(){ echo github; }; twitter(){ echo twitter; }; facebook(){ echo facebook; }; if [[ $(type -t "$1") == "function" ]]; then "$1"; else echo "There is no defined function for $1"; fi; But this slightly