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Get records with max value for each group of grouped SQL results
...alue for.
You avoid complicated subqueries that try to find the max() etc, and also the problems of returning multiple rows when there are more than one with the same maximum value (as the other answers would do)
Note: This is a mysql-only solution. All other databases I know will throw an SQL synta...
What's the @ in front of a string in C#?
...string verbatim = @"foo\bar";
string regular = "foo\\bar";
Here verbatim and regular have the same contents.
It also allows multi-line contents - which can be very handy for SQL:
string select = @"
SELECT Foo
FROM Bar
WHERE Name='Baz'";
The one bit of escaping which is necessary for verbatim s...
Loop through all the files with a specific extension
I want to loop through each file in the current folder and check if it matches a specific extension. The code above doesn't work, do you know why?
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Create or write/append in text file
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Yup it create the text file logs.txt and append the content in it
– SpencerX
Jul 26 '14 at 15:21
5
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A field initializer cannot reference the nonstatic field, method, or property
I have a class and when I try to use it in another class I receive the error below.
4 Answers
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Static table view outside UITableViewController
After the new Xcode update, my app doesn't validate and shows this error:
4 Answers
4
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How can I disable the UITableView selection?
When you tap a row in a UITableView , the row is highlighted and selected. Is it possible to disable this so tapping a row does nothing?
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What's the fundamental difference between MFC and ATL?
... nothing fancy), what is the fundamental difference I will see between ATL and MFC, to help me figure out which one to use?
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What is RPC framework and Apache Thrift?
...for a University project. As this tutorial says, it is an RPC framework, and it was the only document I could find for Thrift other than their documentation .
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What REALLY happens when you don't free after malloc?
...hink of might be something like Palm OS where the program's static storage and runtime memory are pretty much the same thing, so not freeing might cause the program to take up more storage. (I'm only speculating here.)
So generally, there's no harm in it, except the runtime cost of having more sto...