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How does “cat
...to provide a string into stdin. See https://en.wikipedia.org/wiki/Here_document#Unix_shells for more details.
From man bash:
Here Documents
This type of redirection instructs the shell to read input from
the current source until a line
containing only word (with no trailing
blanks)...
What's the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN? [duplicate]
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These pictures don't do it for me. Why is the top right picture not simply SELECT * FROM TableA;? Why is the top left picture not simply SELECT * FROM TableB;? Why is the top middle picture not SELECT * FROM A INTERSECT SELECT * FROM B ? etc
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How do I setup a SSL certificate for an express.js server?
...s well as the Node docs for https.createServer (which is what express recommends to use):
var privateKey = fs.readFileSync( 'privatekey.pem' );
var certificate = fs.readFileSync( 'certificate.pem' );
https.createServer({
key: privateKey,
cert: certificate
}, app).listen(port);
Other opti...
Can Android Studio be used to run standard Java projects?
For those times when you want to isolate the Java and give it a quick test..
13 Answers
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Programmatically Determine a Duration of a Locked Workstation?
...ation will need to be running, but so long as it is:
Microsoft.Win32.SystemEvents.SessionSwitch += new Microsoft.Win32.SessionSwitchEventHandler(SystemEvents_SessionSwitch);
void SystemEvents_SessionSwitch(object sender, Microsoft.Win32.SessionSwitchEventArgs e)
{
if (e.Reason == SessionSwitch...
How to create a colored 1x1 UIImage on the iPhone dynamically?
...
Nice one :-) I would recommend putting this method into a category as a class method, then it can be added into a project simply, and invoked using a line like [UIImage imageWithColor: [UIColor redColor]].
– user577537
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'Missing recommended icon file - The bundle does not contain an app icon for iPhone / iPod Touch of
I submitted an app update, but I have received an email telling me this error has occurred:
16 Answers
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What columns generally make good indexes?
... you are required to search particular records. Suppose, we have a table named buyers where the SELECT query uses indexes like below:
SELECT
buyer_id /* no need to index */
FROM buyers
WHERE first_name='Tariq' /* consider to use index */
AND last_name='Iqbal' /* consider to use index */
Since ...
Does MySQL included with MAMP not include a config file?
I can't seem to find the my.cnf or other config file for the MySQL that comes with MAMP . Does it not include one?
6 Answe...
What is the difference between self-types and trait subclasses?
...A. When you use self-types, B requires an A. There are two specific requirements that are created with self-types:
If B is extended, then you're required to mix-in an A.
When a concrete class finally extends/mixes-in these traits, some class/trait must implement A.
Consider the following example...