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DROP IF EXISTS VS DROP?
... TABLE table_name;
IF EXISTS is not standard; different platforms might support it with different syntax, or not support it at all. In PostgreSQL, the syntax is
DROP TABLE IF EXISTS table_name;
The first one will throw an error if the table doesn't exist, or if other database objects depend on ...
How to conclude your merge of a file?
After I merged a file in Git I tried to pull the repository but error came up:
5 Answers
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Scala @ operator
...e. Consider the following, for instance:
val o: Option[Int] = Some(2)
You can easily extract the content:
o match {
case Some(x) => println(x)
case None =>
}
But what if you wanted not the content of Some, but the option itself? That would be accomplished with this:
o match {
case...
How can I return an empty IEnumerable?
Given the following code and the suggestions given in this question , I've decided to modify this original method and ask if there are any values in the IEnumarable return it, if not return an IEnumerable with no values.
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What is the maximum number of characters that nvarchar(MAX) will hold?
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Max. capacity is 2 gigabytes of space - so you're looking at just over 1 billion 2-byte characters that will fit into a NVARCHAR(MAX) field.
Using the other answer's more detailed numbers, you should be able to store
(2 ^ 31 - 1 - 2) / 2 = 1'073'741'822 double-byte ch...
How to create a new language for use in Visual Studio
I want to write a new templating language, and I want Visual Studio to "support" it. What I need to know is:
7 Answers
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Using usort in php with a class private function
ok using usort with a function is not so complicated
5 Answers
5
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module unsafe for SAFESEH image C++
I am using Microsoft Visual Studio 2011 Professional Beta
5 Answers
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What are '$$' used for in PL/pgSQL
Being completely new to PL/pgSQL , what is the meaning of double dollar signs in this function :
2 Answers
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How can I tell Moq to return a Task?
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Your method doesn't have any callbacks so there is no reason to use .CallBack(). You can simply return a Task with the desired values using .Returns() and Task.FromResult, e.g.:
MyType someValue=...;
mock.Setup(arg=>arg.DoS...