大约有 44,000 项符合查询结果（耗时：0.0991秒） [XML]
Reading Excel files from C#
...Tables["anyNameHere"].AsEnumerable();
as this lets me use LINQ to search and build structs from the fields.
var query = data.Where(x => x.Field<string>("phoneNumber") != string.Empty).Select(x =>
new MyContact
{
firstName= x....
how to emulate “insert ignore” and “on duplicate key update” (sql merge) with postgresql?
...m a subquery, you're best of splitting it into two queries, one for INSERT and one for UPDATE (as an appropriate join/subselect of course - no need to write your main filter twice)
share
|
improve t...
Is errno thread-safe?
...l
errno is defined by including the
header , as specified by the
C Standard ... For each thread of a
process, the value of errno shall not
be affected by function calls or
assignments to errno by other threads.
Also see http://linux.die.net/man/3/errno
errno is thread-local; settin...
Can you force Visual Studio to always run as an Administrator in Windows 8?
In Windows 7, you could go into a programs compatibility settings and check off to always run as an Administrator. Is there a similar option in Windows 8?
...
Storing C++ template function definitions in a .CPP file
...n’t I separate the definition of my templates class from its declaration and put it inside a .cpp file?
How can I avoid linker errors with my template functions?
How does the C++ keyword export help with template linker errors?
They go into a lot of detail about these (and other) template issues...
Why do we have map, fmap and liftM?
...
map exists to simplify operations on lists and for historical reasons (see What's the point of map in Haskell, when there is fmap?).
You might ask why we need a separate map function. Why not just do away with the current
list-only map function, and rename fmap...
How can I pass a member function where a free function is expected?
...unction static in which case it doesn't require any object to be called on and you can use it with the type void (*)(int, int).
If you need to access any non-static member of your class and you need to stick with function pointers, e.g., because the function is part of a C interface, your best opt...
How to install JSTL? The absolute uri: http://java.sun.com/jstl/core cannot be resolved
... users. The problem with Tomcat is that it does not offer JSTL out the box and thus you have to manually install it. This is not necessary in normal Java EE servers. See also What exactly is Java EE?
In your specific case, your pom.xml basically tells you that you have jstl-1.2.jar and standard-1.1...
Elegant method to generate array of random dates within two dates
I have a datepicker where I show two months and I want to randomly choose 3 dates in each visible month
4 Answers
...
PHP - how to best determine if the current invocation is from CLI or web server?
I need to determine whether the current invocation of PHP is from the command line (CLI) or from the web server (in my case, Apache with mod_php).
...