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Java - No enclosing instance of type Foo is accessible
...
static class Thing will make your program work.
As it is, you've got Thing as an inner class, which (by definition) is associated with a particular instance of Hello (even if it never uses or refers to it), which means it's an error to say new Thing(...
Is it a bad practice to use break in a for loop? [closed]
Is it a bad practice to use break statement inside a for loop ?
19 Answers
19
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ImportError: Cannot import name X
...and physics. I will not post all the code, just the imports, because I think that's where the error is. (If you want, I can post more)
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How to unstash only certain files?
... file (or changes to a file) from a git stash?", you can apply use git checkout or git show to restore a specific file.
git checkout stash@{0} -- <filename>
With Git 2.23+ (August 2019), use git restore, which replaces the confusing git checkout command:
git restore -s stash@{0} -- <filena...
React.js - input losing focus when rerendering
...code, this is a guess.
When you create a EditorContainer, specify a unique key for the component:
<EditorContainer key="editor1"/>
When a re-rendering occurs, if the same key is seen, this will tell React don't clobber and regenerate the view, instead reuse. Then the focused item should reta...
Is there a standard way to list names of Python modules in a package?
Is there a straightforward way to list the names of all modules in a package, without using __all__ ?
10 Answers
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How to specify different Debug/Release output directories in QMake .pro file
I have a Qt project and I would like to output compilation files outside the source tree.
11 Answers
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Storing integer values as constants in Enum manner in java [duplicate]
...'s the point of enumerated types.
However, if you're willing to add a few keystrokes, you can add fields to your enums, like this:
public enum PAGE{
SIGN_CREATE(0),
SIGN_CREATE_BONUS(1),
HOME_SCREEN(2),
REGISTER_SCREEN(3);
private final int value;
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The calling thread cannot access this object because a different thread owns it
...a thread other than the main thread, you need to use:
this.Dispatcher.Invoke(() =>
{
...// your code here.
});
You can also use control.Dispatcher.CheckAccess() to check whether the current thread owns the control. If it does own it, your code looks as normal. Otherwise, use above pattern....
How to use GROUP BY to concatenate strings in SQL Server?
...t need to be creative with FOR XML and PATH.
[Note: This solution only works on SQL 2005 and later. Original question didn't specify the version in use.]
CREATE TABLE #YourTable ([ID] INT, [Name] CHAR(1), [Value] INT)
INSERT INTO #YourTable ([ID],[Name],[Value]) VALUES (1,'A',4)
INSERT INTO #Your...