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How do I import the Django DoesNotExist exception?
...mentation:
self.assertRaises(Answer.DoesNotExist, Answer.objects.get, body__exact='<p>User can reply to discussion.</p>')
or better:
with self.assertRaises(Answer.DoesNotExist):
Answer.objects.get(body__exact='<p>User can reply to discussion.</p>')
...
Best way to create unique token in Rails?
...:
With Rails 4 and concerns, I would recommend moving this to concern.
# app/models/model_name.rb
class ModelName < ActiveRecord::Base
include Tokenable
end
# app/models/concerns/tokenable.rb
module Tokenable
extend ActiveSupport::Concern
included do
before_create :generate_token
...
What is the meaning of single and double underscore before an object name?
...owever, nothing special is done with the name itself.
To quote PEP-8:
_single_leading_underscore: weak "internal use" indicator. E.g. from M import * does not import objects whose name starts with an underscore.
Double Underscore (Name Mangling)
From the Python docs:
Any identifier of th...
How do I specify multiple targets in my podfile for my Xcode project?
...ike this:
def shared_pods
pod 'SSKeychain', '~> 0.1.4'
pod 'INAppStoreWindow', :head
pod 'AFNetworking', '1.1.0'
pod 'Reachability', '~> 3.1.0'
pod 'KSADNTwitterFormatter', '~> 0.1.0'
pod 'MASShortcut', '~> 1.1'
pod 'MagicalRecord', '2.1'
pod 'MASPrefere...
Getting MAC Address
...inding function into your own code easily:
from uuid import getnode as get_mac
mac = get_mac()
The return value is the mac address as 48 bit integer.
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ObservableCollection not noticing when Item in it changes (even with INotifyPropertyChanged)
...leCollection<EntityViewModel> ContentList
{
get { return _contentList; }
}
public CollectionViewModel()
{
_contentList = new ObservableCollection<EntityViewModel>();
_contentList.CollectionChanged += ContentCollectionChanged;
}
public v...
Remove last item from array
...
learn by example:
let array_1 = [1,2,3,4];
let array_2 = [1,2,3,4];
let array_3 = [1,2,3,4];
array_1.splice(-1,1) // output --> [4] array_1 = [1,2,3]
array_2.slice(0,-1); // output --> [1,2,3] array_2 = [1,2,3,4]
array_3.pop(); //...
What's the difference between SortedList and SortedDictionary?
...ET 4.5) to backup my claims.
Private members
// Fields
private const int _defaultCapacity = 4;
private int _size;
[NonSerialized]
private object _syncRoot;
private IComparer<TKey> comparer;
private static TKey[] emptyKeys;
private static TValue[] emptyValues;
private KeyList<TKey, TValue&...
How do I copy a string to the clipboard on Windows using Python?
I'm trying to make a basic Windows application that builds a string out of user input and then adds it to the clipboard. How do I copy a string to the clipboard using Python?
...
Apache Spark: The number of cores vs. the number of executors
...s a little more concrete, here’s a worked example of configuring a Spark app to use as much of the cluster as
possible: Imagine a cluster with six nodes running NodeManagers, each
equipped with 16 cores and 64GB of memory. The NodeManager capacities,
yarn.nodemanager.resource.memory-mb and
yarn.no...