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IEnumerable vs List - What to Use? How do they work?
...abase table you don't want to copy the entire thing into memory before you start processing the rows.
Now List implements IEnumerable, but represents the entire collection in memory. If you have an IEnumerable and you call .ToList() you create a new list with the contents of the enumeration in memo...
What is the difference between google tag manager and google analytics?
...asons why to use GTM: http://www.lunametrics.com/blog/2014/04/08/8-reasons-start-google-tag-manager/
For Android, A draft implementation is at https://developers.google.com/tag-manager/android/v4/#getting-started
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Moving average or running mean
...ll members equal to 1/N. The numpy implementation of convolve includes the starting transient, so you have to remove the first N-1 points:
def runningMeanFast(x, N):
return np.convolve(x, np.ones((N,))/N)[(N-1):]
On my machine, the fast version is 20-30 times faster, depending on the length o...
Using IoC for Unit Testing
... +1 for the phrase "like pouring cement into your code". I've started using it all the time.
– Andrew Shepherd
Mar 8 '13 at 1:14
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Binary Data in JSON String. Something better than Base64
...ncoding is that it makes it robust and possible to locate multi byte chars start and end whatever byte we start looking at.
As a consequence, if encoding a byte value in the range [0..127] would need only one byte in UTF-8 encoding, encoding a byte value in the range [128..255] would require 2 byte...
Why is it not advisable to have the database and web server on the same machine?
... just the easiest step in scaling..
It's exactly what StackOverflow did - starting with single machine running IIS/SQL Server, then when it started getting heavily loaded, a second server was bought and the SQL server was moved onto that.
If performance is not an issue, do not waste money buying/m...
Pass a parameter to a fixture function
...============================================================= test session starts =================================================================================
platform cygwin -- Python 3.6.8, pytest-5.3.1, py-1.8.0, pluggy-0.13.1 -- /usr/bin/python3
cachedir: .pytest_cache
rootdir: .
collected ...
Handling a Menu Item Click Event - Android
I want to create an intent that starts a new activity once a Menu Item is clicked, but I'm not sure how to do this. I've been reading through the android documentation, but my implementation isn't correct..and some guidance in the right direction would help. I've listed my code below and commented o...
What is the difference between List (of T) and Collection(of T)?
...gt; c = new Collection<long>();
Stopwatch s = new Stopwatch();
s.Start();
for (long i = 0; i <= 10000000; i++)
{
c.Add(i);
}
s.Stop();
MessageBox.Show("collect " + s.ElapsedMilliseconds.ToString());
List<long> l = new List<long>();
Stopwatch s2 = new Stopw...
What does Class mean in Java?
...en leads to confusion and errors, because, when you see it first, then you start believing, <?> is a wildcard for any java type. Which is .. not true. <?> is the unknown type, a slight and nasty difference.
It's not a problem when you use it with Class. Both lines work and compile:
Cla...