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WPF Data Binding and Validation Rules Best Practices
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From MS's Patterns & Practices documentation:
Data Validation and Error Reporting
Your view model or model will often be
required to perform data validation
and to signal any data validation
errors to the v...
How to determine the encoding of text?
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Correctly detecting the encoding all times is impossible.
(From chardet FAQ:)
However, some encodings are optimized
for specific languages, and languages
are not random. Some character
sequences pop up all the time, while
other sequences make no sense. A
person fluent i...
URL Fragment and 302 redirects
...TP/1.1): Semantics and Content, has been published as a PROPOSED STANDARD. From the Changelog:
The syntax of the Location header field has been changed to allow all
URI references, including relative references and fragments, along
with some clarifications as to when use of fragments would n...
$apply already in progress error
...$apply? You shouldn't ever need to call $apply unless you are interfacing from a non-Angular event. The existence of $apply usually means I am doing something wrong (unless, again, the $apply happens from a non-Angular event).
If $apply really is appropriate here, consider using a "safe apply" ap...
Possible heap pollution via varargs parameter
... array. A runtime error will occur
// (ClassCastException due to a casting from Integer to String)
T firstElement = bar[0].get(0);
If you reviewed the method to ensure that it doesn't contain such vulnerabilities then you can annotate it with @SafeVarargs to suppress the warning. For interfaces, u...
Declaration/definition of variables locations in ObjectiveC?
...u were able to access these variables only in your implementation, but not from other classes. To do that, you had to declare accessor methods, that look something like this:
// MyClass.h
@interface MyClass : NSObject {
int myVar;
}
- (int)myVar;
- (void)setMyVar:(int)newVar;
@end
// MyClas...
How to remove item from list in C#?
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Short answer:
Remove (from list results)
results.RemoveAll(r => r.ID == 2); will remove the item with ID 2 in results (in place).
Filter (without removing from original list results):
var filtered = result.Where(f => f.ID != 2); returns all ...
How do you declare an interface in C++?
... It would still be nice to be able to create interfaces, to save us from typing so much (virtual , =0, virtual destructor). Also multiple inheritance seems like a really bad idea to me and I've never seen it used in practice, but interfaces are needed all the time. To bad the C++ comity won't...
Writing to an Excel spreadsheet
I am new to Python. I need to write some data from my program to a spreadsheet. I've searched online and there seem to be many packages available (xlwt, XlsXcessive, openpyxl). Others suggest to write to a .csv file (never used CSV and don't really understand what it is).
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Are there any downsides to enabling git rerere?
...it will be incorrect again. You can forget a recorded resolution, though. From the documentation:
git rerere forget <pathspec>
This resets the conflict resolutions which rerere has recorded for the current conflict in <pathspec>.
Be careful to use it on specific paths; you don't want ...