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Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
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You will find it by reading the couple of pages of Muthukrishnan - Data Stream Algorithms: Puzzle 1: Finding Missing Numbers. It shows exactly the generalization you are looking for. Probably this is what your interviewer read and why he posed t...
Is explicitly closing files important?
...osed" but does not explain "what if it stays open". For the latter, please read the "What would happen if a file stays open?" part in this answer (askubuntu.com/questions/701491/…)
– RayLuo
Aug 22 '16 at 16:58
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Algorithm to compare two images
...o results.
Zipping
Ow's answer in this question is excellent, I remember reading about these sort of techniques studying AI. It is quite effective at comparing corpus lexicons.
One interesting optimisation when comparing corpuses is that you can remove words considered to be too common, for examp...
Getting RAW Soap Data from a Web Reference Client running in ASP.net
...wn.
public class SoapLoggerExtension : SoapExtension
{
private static readonly ILog log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
private Stream oldStream;
private Stream newStream;
public override object GetInitializer(LogicalMethodInfo methodInfo, SoapE...
Exif manipulation library for python [closed]
...iv2: http://exiv2.org/) is a mature, open-source C++ library that supports reading and writing metadata to many image types (JPEG, PNG, TIFF and many raw formats), understands standard (Xmp, IPTC and Exif) and non-standard metadata ("Makernotes"), and runs on multiple platforms (Windows, Linux, and,...
Design patterns to avoid [closed]
...solutions. However it is instead much more interesting for a programmer to read up on design techniques and principles that lay the foundation for most of the patterns. In fact one of my favorite books on 'design patterns' stresses this by reiterating on what principles are applicable on the pattern...
What's the best way of structuring data on firebase?
...oin statements and queries.
You also want to denormalize in places where read efficiency is a concern. This is a technique used by all the large scale apps (e.g. Twitter and Facebook) and although it goes against our DRY principles, it's generally a necessary feature of scalable apps.
The gist he...
How can I improve my paw detection?
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If you're just wanting (semi) contiguous regions, there's already an easy implementation in Python: SciPy's ndimage.morphology module. This is a fairly common image morphology operation.
Basically, you have 5 steps:
def find_paws(data, smooth_radius=5, threshold=0.0001):
dat...
Unable to evaluate expression because the code is optimized or a native frame is on top of the call
... use the Response.End, Response.Redirect, or Server.Transfer
method, a ThreadAbortException exception occurs. You can use a
try-catch statement to catch this exception.
Cause
The Response.End method ends the page execution and shifts the
execution to the Application_EndRequest event in t...
MongoDB vs. Cassandra [closed]
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Lots of reads in every query, fewer regular writes
Both databases perform well on reads where the hot data set fits in memory. Both also emphasize join-less data models (and encourage denormalization instead), and both provide inde...