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JAXB creating context and marshallers cost
...e created once and reused to avoid the cost of initializing the metadata multiple times. Marshaller and Unmarshaller are not thread safe, but are lightweight to create and could be created per operation.
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UITableView load more when scrolling to bottom like Facebook application
... {
cell = [[MyCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:MainMenuCellIdentifier];
}
MyData *data = [self.dataArray objectAtIndex:indexPath.row];
// Do your cell customisation
// cell.titleLabel.text = data.title;
BOOL lastItemReached = [data...
Real World Example of the Strategy Pattern
... where the complete file is read and kept in memory ( let's say for files < 1 gb )
For large files, you can use another strategy, where parts of the file are read in memory and partial encrypted results are stored in tmp files.
These may be two different strategies for the same task.
The cli...
How do I validate a date string format in python?
...t;> validate('2003-12-32')
Traceback (most recent call last):
File "<pyshell#20>", line 1, in <module>
validate('2003-12-32')
File "<pyshell#18>", line 5, in validate
raise ValueError("Incorrect data format, should be YYYY-MM-DD")
ValueError: Incorrect data format, ...
Writing data into CSV file in C#
...second);
csv.AppendLine(newLine);
//after your loop
File.WriteAllText(filePath, csv.ToString());
Or something to this effect.
My reasoning is: you won't be need to write to the file for every item, you will only be opening the stream once and then writing to it.
You can replace
File.W...
C++ Singleton design pattern
...at deleted functions should generally
// be public as it results in better error messages
// due to the compilers behavior to check accessibility
// before deleted status
};
See this article about when to use a singleton: (not often)
Singleton: How should ...
Cocoa Autolayout: content hugging vs content compression resistance priority
...priority > 500 it'll look like this:
[Click Me]
If Hugging priority < 500 it'll look like this:
[ Click Me ]
If the superview now shrinks then, if the Compression Resistance priority > 500, it'll look like this
[Click Me]
Else if Compression Resistance priority < 500,...
What's an easy way to read random line from a file in Unix command line?
...
Thanks for the shuf tip, it's built-in in Fedora.
– Cheng
Dec 2 '10 at 2:52
5
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Case insensitive access for generic dictionary
...Comparer.OrdinalIgnoreCase;
var caseInsensitiveDictionary = new Dictionary<string, int>(comparer);
Or create a new case-insensitive dictionary with the contents of an existing case-sensitive dictionary (if you're sure there are no case collisions):-
var oldDictionary = ...;
var comparer = S...
Using pip behind a proxy with CNTLM
...
Under Windows dont forget to set
SET HTTPS_PROXY=<proxyHost>:<proxyPort>
what I needed to set for
pip install pep8
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