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GROUP_CONCAT comma separator - MySQL
I have a query where I am using GROUP_CONCAT and a custom separator as my results may contain commas: '----'
3 Answers
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Avoiding memory leaks with Scalaz 7 zipWithIndex/group enumeratees
Background
1 Answer
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Cast Object to Generic Type for returning
Is there a way to cast an object to return value of a method?
I tried this way but it gave a compile time exception in "instanceof" part:
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How to find which rspec test is taking so long
One (or a couple) of our tests are taking forever and we'd like to optimize them.
1 Answer
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Where do I mark a lambda expression async?
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To mark a lambda async, simply prepend async before its argument list:
// Add a command to delete the current Group
contextMenu.Commands.Add(new UICommand("Delete this Group", async (contextMenuCmd) =>
{
SQLiteUtils slu = new SQLiteUtils();
await slu.DeleteGroupAsync(grou...
How to do Mercurial's 'hg remove' for all missing files?
I use this to remove a file from the repo:
4 Answers
4
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How do you rename a table in SQLite 3.0?
How do you rename a table in SQLite 3.0?
2 Answers
2
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How to wait for all goroutines to finish without using time.Sleep?
This code selects all xml files in the same folder, as the invoked executable and asynchronously applies processing to each result in the callback method (in the example below, just the name of the file is printed out).
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Get line number while using grep
I am using grep recursive to search files for a string, and all the matched files and the lines containing that string are print on the terminal. But is it possible to get the line numbers of those lines too??
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MySQL how to join tables on two fields
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SELECT *
FROM t1
JOIN t2 USING (id, date)
perhaps you'll need to use INNEER JOIN or
where t2.id is not null
if you want results only matching both conditions
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