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Cross-thread operation not valid: Control accessed from a thread other than the thread it was create
...lease read the Threading Model in UI applications (old VB link is here) in order to understand basic concepts. The link navigates to page that describes the WPF threading model. However, Windows Forms utilizes the same idea.
The UI Thread
There is only one thread (UI thread), that is allowed to a...
What do ellipsis […] mean in a list?
...crete example.
Graph reduction is an evaluation strategy sometime used in order to interpret a computer language. This is a common strategy for lazy evaluation, notably of functional languages.
The starting point is to build a graph representing the sequence of "steps" the program will take. Depen...
Importing a GitHub project into Eclipse
...Git → Projects from Git
If the Git repo isn't cloned yet:
In> order to checkout a remote project, you will have to clone its repository first.
Open the Eclipse Import wizard (e.g. File => Import), select Git => Projects from Git and click Next.
Select “URI” and click Next.
Now...
Tetris-ing an array
...refix that takes two strings as input. Then apply it to the strings in any order to reduce them to their common prefix. Since it is associative and commutative the order doesn't matter for the result.
This is the same as for other binary operations like for example addition or greatest common divis...
What is the difference between Non-Repeatable Read and Phantom Read?
... will allow dirty reads, which in some cases is an acceptable trade off in order to achieve higher concurrency or is necessary due to an edge case, such as troubleshooting an in progress transaction from another connection. It is good that the idea of a dirty read doesn't pass the "smell test" for y...
Write to UTF-8 file in Python
...u've given me a byte string!"
Try writing the Unicode string for the byte order mark (i.e. Unicode U+FEFF) directly, so that the file just encodes that as UTF-8:
import codecs
file = codecs.open("lol", "w", "utf-8")
file.write(u'\ufeff')
file.close()
(That seems to give the right answer - a fil...
TypeScript and field initializers
...safety and property initialization, but its all optional and can be out-of-order. You get the class's defaults left alone if you don't pass a field.
You can also mix it with required constructor parameters too -- stick fields on the end.
About as close to C# style as you're going to get I think ...
Symbolicating iPhone App Crash Reports
...
After reading all these answers here in order to symbolicate a crash log (and finally succeeding) I think there are some points missing here that are really important in order to determine why the invocation of symbolicatecrash does not produce a symbolicated outpu...
How does Django's Meta class work?
...t of django
Model metadata is “anything that’s not a field”, such as ordering options (ordering), database table name (db_table), or human-readable singular and plural names (verbose_name and verbose_name_plural). None are required, and adding class Meta to a model is completely optional.
http...
SQL left join vs multiple tables on FROM line?
... Employee.DepartmentID
Note that the last one there is an inner join, in order to fulfill the criteria that you only want departments with people.
Ok, so what happens now. Well, the problem is, it depends on the database engine, the query optimizer, indexes, and table statistics. Let me explain.
...