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SQL JOIN and different types of JOINs
... film_actor fa
WHERE a.actor_id = fa.actor_id
)
Some folks (especially MySQL people) also write ANTI JOIN like this:
SELECT *
FROM actor a
LEFT JOIN film_actor fa
USING (actor_id)
WHERE film_id IS NULL
I think the historic reason is performance.
LATERAL JOIN
OMG, this one is too cool. I'm t...
Can you “ignore” a file in Perforce?
... a client named "CLIENT", a directory named "foo" (located at your project root), and you wish to ignore all .dll files in that directory tree, you can add the following lines to your workspace view to accomplish this:
-//depot/foo/*.dll //CLIENT/foo/*.dll
-//depot/foo/.../*.dll //CLIENT/foo/.../*...
What is the difference between Xamarin.Form's LayoutOptions, especially Fill and Expand?
...d is only used for children of StackLayout. So, if your StackLayout is the root, or not in another StackLayout, Expand has no affect. Instead, any option other than Fill would act as a "wrap content" for sizing, which is what you see.
– therealjohn
Dec 6 '16 at...
Is there a “vim runtime log”?
...
I had to add "set nocp" to use "ToggleVerbose()" function when run in root because of &verbose
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What is the difference between gsub and sub methods for Ruby Strings
...s not obvious! Java calls these replace and replaceAll. But Ruby has its roots in Perl which uses the g modifier. It's just one of those things.
– Ray Toal
Jul 21 '11 at 0:27
1
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Determining Whether a Directory is Writeable
... cause weirdness in SUID/SGID environments. (‘but the script runs setuid root, why can't it write to the file?’)
– Alexios
May 13 '16 at 8:37
6
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JavaScript module pattern with example [closed]
...amespaces need to appear in some other file first - they are just objects rooted by our application variable.
I've only taken minor steps with this at the moment (i'm refactoring some normal javascript out of an extjs app so I can test it) but it seems quite nice as you can define little functiona...
How to permanently add a private key with ssh-add on Ubuntu? [closed]
...file in the ~/.ssh directory, then you should create one. It does not need root rights, so simply:
nano ~/.ssh/config
...and enter the lines above as per your requirements.
For this to work the file needs to have chmod 600. You can use the command chmod 600 ~/.ssh/config.
If you want all users ...
datatrigger on enum to change image
...
You need 2 things to get this working:
1 - Add an xmlns reference in the root element of your XAML file, to the namespace where your Enum is defined:
<UserControl ...
xmlns:my="clr-namespace:YourEnumNamespace;assembly=YourAssembly">
2 - in the Value property of the DataTrigger, use the {...
Is there a use-case for singletons with database access in PHP?
I access my MySQL database via PDO. I'm setting up access to the database, and my first attempt was to use the following:
1...