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Difference between SPI and API?
...
From Effective Java, 2nd Edition:
A service provider framework is a
system in which multiple service
providers implement a service, and the
system makes the implementations
available to its clients, decoupling
t...
jQuery UI Sortable Position
... As an additional note, if you want to track where the moved item came from (move from position 0 to position 2) then you need to access the ui.item.index() value in the start event and store that value.
– David Boike
Apr 10 '12 at 14:23
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Comment Inheritance for C# (actually any language)
...low up the code unnecessarily. If a tool can understand what a method does from its name, than a person can also understand and no doc is needed.
– Lensflare
Jan 8 '16 at 12:59
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Convert String to Calendar Object in Java
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tl;dr
The modern approach uses the java.time classes.
YearMonth.from(
ZonedDateTime.parse(
"Mon Mar 14 16:02:37 GMT 2011" ,
DateTimeFormatter.ofPattern( "E MMM d HH:mm:ss z uuuu" )
)
).toString()
2011-03
Avoid legacy date-time classes
The modern way is w...
Mimicking sets in JavaScript?
...n the list:
if (A in obj) {
// put code here
}
Question 2: Delete 'A' from the list if it's there:
delete obj[A];
Question 3: Add 'A' to the list if it wasn't already there
obj[A] = true;
For completeness, the test for whether A is in the list is a little safer with this:
if (Object.prototyp...
Instance variables vs. class variables in Python
...(a little bit) faster (one less level of "lookup" due to the "inheritance" from class to instance), and there are no downsides to weigh against this small advantage.
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Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
...rgv[0][0] shall be the null character if the program name is not available from the host environment.
So no, it's only the program name if that name is available. And it "represents" the program name, not necessarily is the program name. The section before that states:
If the value of argc is ...
Unpacking, extended unpacking and nested extended unpacking
... we get
((a, b), c) = ((1, 2), ('t', 'h', 'i', 's'))
But now it's clear from the structure that 'this' won't be unpacked, but assigned directly to c. So we undo the substitution.
((a, b), c) = ((1, 2), 'this')
Now let's see what happens when we wrap c in a tuple:
(a,b), (c,) = [1,2],'this' ...
How to force a WPF binding to refresh?
...YourCollectionProperty) as opposed to a literal string. This prevents bugs from refactoring and is more explicit what is actually intended. This is of course where you can't use the CallerMemberName attribute which is even nicer
– Assimilater
Aug 18 '17 at 18:2...
Android: How can I pass parameters to AsyncTask's onPreExecute()?
...here all the stuff you want to do in the background, in a different thread from the main one. Here we have as an input value an array of objects from the type “X” (Do you see in the header? We have “...extends AsyncTask” These are the TYPES of the input parameters) and returns an object from...