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IEnumerable vs List - What to Use? How do they work?
...way.
Whenever I'm "stacking" LINQ expressions, I use IEnumerable, because by only specifying the behavior I give LINQ a chance to defer evaluation and possibly optimize the program. Remember how LINQ doesn't generate the SQL to query the database until you enumerate it? Consider this:
public IEnum...
Python Selenium accessing HTML source
..., much more compact that the other, still valid, alternative (find_element_by_xpath("//*").get_attribute("outerHTML")(
– 5agado
Mar 28 '14 at 14:16
...
Save Screen (program) output to a file
...
@aaa90210 It's ctrl-a followed by a separate press of h for a hardcopy. ctrl-a followed by a separate press of shift-h starts a complete log file.
– James
Mar 27 '18 at 9:47
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When should use Readonly and Get only properties
...utside the class.
You can however change the value using methods provided by your class :
public class FuelConsumption {
private double fuel;
public double Fuel
{
get { return this.fuel; }
}
public void FillFuelTank(double amount)
{
this.fuel += amount;
...
How do I automatically update a timestamp in PostgreSQL
...tamp
)
Note that the value for that column can explicitly be overwritten by supplying a value in the INSERT statement. If you want to prevent that you do need a trigger.
You also need a trigger if you need to update that column whenever the row is updated (as mentioned by E.J. Brennan)
Note tha...
Best way to show a loading/progress indicator?
...Wait while loading...");
progress.setCancelable(false); // disable dismiss by tapping outside of the dialog
progress.show();
// To dismiss the dialog
progress.dismiss();
OR
ProgressDialog.show(this, "Loading", "Wait while loading...");
Read more here.
By the way, Spinner has a different meanin...
How to do error logging in CodeIgniter (PHP)
...ata, it should be pretty safe. This file is relative to an index.html page by default so obviously generated php files wouldn't be publicly accessible- but you'll never know. Make sure to have all of this precautions in place if you change the default application/logs directory.
...
How to fire AJAX request Periodically?
...ght a bit more advanced technique that I learned from this excellent video by Paul Irish: http://paulirish.com/2010/10-things-i-learned-from-the-jquery-source/
For periodic tasks that might end up taking longer than the repeat interval (like an HTTP request on a slow connection) it's best not to us...
How do I get a file extension in PHP?
... You should ensure the value you receive from this is in fact a valid type by querying iana.org/assignments/media-types/media-types.txt or by checking your own MimeType Map.
– John Foley
Apr 23 '15 at 1:11
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How to convert java.sql.timestamp to LocalDate (java8) java.time?
... why they added this method to the JDK as it makes things really confusing by doing an implicit conversion using the system timezone. Usually when using only java8 date classes the programmer is forced to specify a timezone which is a good thing.
The good solution is
timestamp.toInstant().atZone(z...