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Why are only final variables accessible in anonymous class?
...y though, if you want the same sort of functionality as C# where variables from different scopes can be "instantiated" different numbers of times.
– Jon Skeet
Jan 19 '11 at 7:15
3
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Is it intended by the C++ standards committee that in C++11 unordered_map destroys what it inserts?
...ents, the "universal" constructor is not, in fact, supposed to always move from its argument. It's supposed to move if the argument is really an rvalue, and copy if it's an lvalue.
The behaviour, you observe, which always moves, is a bug in libstdc++, which is now fixed according to a comment on th...
What is the difference between memoization and dynamic programming?
...t (which typically recurses down to solve the sub-problems).
A good slide from here (link is now dead, slide is still good though):
If all subproblems must be solved at least once, a bottom-up dynamic-programming algorithm usually outperforms a top-down memoized algorithm by a constant facto...
What is the equivalent of MATLAB's repmat in NumPy
...n the direction of columns, rows and out-of-plane dimension are being read from right to left. The resulting object has a different shape from Matlab. One can no longer assert that repmat and tile are equivalent instructions.
In order to get tile to behave like repmat, in Python one has to make s...
How to capture UIView to UIImage without loss of quality on retina display
...
Switch from use of UIGraphicsBeginImageContext to UIGraphicsBeginImageContextWithOptions (as documented on this page). Pass 0.0 for scale (the third argument) and you'll get a context with a scale factor equal to that of the screen....
The performance impact of using instanceof in Java
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Modern JVM/JIC ..COuld you please mention from which java version these optimiszation have been covered?
– Ravisha
Dec 3 '10 at 9:50
146
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Define css class in django Forms
...can create a custom filter "addcss" in "my_app/templatetags/myfilters.py"
from django import template
register = template.Library()
@register.filter(name='addcss')
def addcss(value, arg):
css_classes = value.field.widget.attrs.get('class', '').split(' ')
if css_classes and arg not in css_...
Maximum size of a element
...ange errors with Firefox 16.0.2.
First, I seem to get different behavior from in memory (created in javascript) canvas as opposed to html declared canvas.
Second, if you don't have the proper html tag and meta charset, the canvas might be restricted to 8196, otherwise you can go up to 32767.
T...
git: diff between file in local repo and origin
...
To view the differences going from the remote file to the local file:
git diff remotename/branchname:remote/path/file1.txt local/path/file1.txt
To view the differences in the other direction:
git diff HEAD:local/path/file1.txt remotename/branchname:re...
Is there a naming convention for MySQL?
...h little and will become a headache when you want to add or remove columns from a table at a later date.
Some other points are:
Index Naming Conventions
You may wish to introduce a naming convention for indexes - this will be a great help for any database metadata work that you might want to car...