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Python - Create a list with initial capacity
...es = [Beer()] * 99
sea = [Fish()] * many
vegetarianPizzas = [None] * peopleOrderingPizzaNotQuiche
[EDIT: Caveat Emptor The [Beer()] * 99 syntax creates one Beer and then populates an array with 99 references to the same single instance]
Python's default approach can be pretty efficient, although ...
Should arrays be used in C++?
... often preferable to using a vector (and std::string), since it
avoids all order of initialization issues; the data is pre-loaded,
before any actual code can be executed.
Finally, related to the above, the compiler can calculate the actual
size of the array from the initializers. You don't have to ...
Unexpected Caching of AJAX results in IE8
... a good answer, but you'll need to turn the caching off in IE9 as well. In order to target just IE8 and IE9 you could do this;
<!--[if lte IE 9]>
<script>
$.ajaxSetup({
cache: false
});
</script>
<![endif]-->
...
How do I use $scope.$watch and $scope.$apply in AngularJS?
...
You need to be aware about how AngularJS works in order to understand it.
Digest cycle and $scope
First and foremost, AngularJS defines a concept of a so-called digest cycle. This cycle can be considered as a loop, during which AngularJS checks if there are any changes to ...
Window vs Page vs UserControl for WPF navigation?
...;
<DockPanel>
<!-- Navigation Buttons -->
<Border DockPanel.Dock="Left" BorderBrush="Black"
BorderThickness="0,0,1,0">
<ItemsControl ItemsSource="{Binding PageViewModels}">
<ItemsControl.ItemTemplate&...
Why should C++ programmers minimize use of 'new'?
... It can do so because it requires you to release the memory in the reverse order (First-In, Last-Out: FILO). This is the memory allocation technique for local variables in many programming languages. It is very, very fast because it requires minimal bookkeeping and the next address to allocate is ...
Creating a div element in jQuery [duplicate]
...amically generated div, you may need to put single quotes around class, in order for things to work in IE7, and IE8 - for example 'class':'my-class-name'
– klewis
Feb 28 '13 at 23:12
...
How to run a class from Jar which is not the Main-Class in its Manifest file
...
According to the doc this won't work: "In order for this option to work, the manifest of the JAR file must contain a line of the form Main-Class: classname. "
– Thomas
Mar 29 '11 at 15:13
...
django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module: No module named MySQLdb
...ld be same architecture) and already tried everything like pip and etc. In order fix this problem do following steps:
Download MySql for Python from here
Untar downloaded file. In terminal window do following: tar xvfz downloade.tar.
cd /to untared directory
Run sudo python setup.py install
If you...
Select distinct values from a table field
...els.CharField(max_length=150)
# some of your models may have explicit ordering
class Meta:
ordering = ('city')
Since you may have the Meta class ordering attribute set, you can use order_by() without parameters to clear any ordering when using distinct(). See the documentation und...