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Difference between ObservableCollection and BindingList
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An ObservableCollection can be updated from UI exactly like any collection. The true difference is rather straightforward:
ObservableCollection<T> implements INotifyCollectionChanged which provides notification when the collection is changed (you guessed ^^...
Do event handlers stop garbage collection from occurring?
...only points one way, a subscriber which has any intention of unsubscribing from an event when done with it will need some form of reference to the publisher. It could be a WeakReference, and in some cases that might be a good idea, but as often as not it will be a strong one.
–...
Can I set max_retries for requests.request?
... set a different maximum retry count, use alternative transport adapters:
from requests.adapters import HTTPAdapter
s = requests.Session()
s.mount('http://stackoverflow.com', HTTPAdapter(max_retries=5))
The max_retries argument takes an integer or a Retry() object; the latter gives you fine-grai...
How to deploy an ASP.NET Application with zero downtime
...ail completely. This ensures data
integrity and prevents data or files
from existing in a "half-way" or
corrupted state. In MS Deploy, TxF is
disabled by default.
It seems the transaction is for the entire sync. Also, TxF is a feature of Windows Server 2008, so this transaction feature wil...
Assigning a variable NaN in python without numpy
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Yes -- use math.nan.
>>> from math import nan
>>> print(nan)
nan
>>> print(nan + 2)
nan
>>> nan == nan
False
>>> import math
>>> math.isnan(nan)
True
Before Python 3.5, one could use float("nan") (case i...
How does collections.defaultdict work?
...igure out what this method means. Can somebody help? Here are two examples from the python docs
15 Answers
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How to pass a URI to an intent?
...he Uri class implements Parcelable, so you can add and extract it directly from the Intent
// Add a Uri instance to an Intent
intent.putExtra("imageUri", uri);
// Get a Uri from an Intent
Uri uri = intent.getParcelableExtra("imageUri");
You can use the same method for any objects that implement ...
Loop backwards using indices in Python?
I am trying to loop from 100 to 0. How do I do this in Python?
15 Answers
15
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How to smooth a curve in the right way?
...adjusted relative to its neighbors. It works great even with noisy samples from non-periodic and non-linear sources.
Here is a thorough cookbook example. See my code below to get an idea of how easy it is to use. Note: I left out the code for defining the savitzky_golay() function because you can l...
How to implement WiX installer upgrade?
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In the newest versions (from the 3.5.1315.0 beta), you can use the MajorUpgrade element instead of using your own.
For example, we use this code to do automatic upgrades. It prevents downgrades, giving a localised error message, and also prevents u...