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Representing and solving a maze given an image
...w(imfilter(im,fspecial('unsharp')),0.15));
% purge small components (e.g. letters)
for i = 1:max(reshape(result,1,1002*800))
[count,~] = size(find(result==i));
if count < 500
result(result==i) = 0;
end
end
% close dead-end channels
closed = zeros(1002,800);
for i = 1:max(res...
Regular expression for floating point numbers
...ping can get very confusing. If the language you are working with supports raw strings, then you should use those to cut down on the number of backslashes, but not all languages do (most notably: Java). Fortunately, there's an alternative that will work some of the time:
String correctPattern = "[....
How fast is D compared to C++?
... -boundscheck=off <sourcefile>
Results
The results (screenshot of raw console output) of each version of the source as follows:
scalar.cpp (original C++):
allocation: 2 ms
random generation: 12 ms
result: 29248300000
time: 2582 ms
C++ sets the standard at 2582 ms.
scalar.d (modifi...
How to solve error “Missing `secret_key_base` for 'production' environment” (Rails 4.1)
...te:
$ RAILS_ENV=production rake secret
This returns a large string with letters and numbers. Copy that, which we will refer to that code as GENERATED_CODE.
Login to your server
If you login as the root user, find this file and edit it:
$ vi /etc/profile
Go to the bottom of the file using Shi...
When should I use C++14 automatic return type deduction?
... work.
As a real-world example, I was asked to change a module from using raw pointers everywhere to smart pointers. Fixing the unit tests was more painful than the actual code.
While there are other ways this could be handled, the use of auto return types seems like a good fit.
...
What does CultureInfo.InvariantCulture mean?
... consistent manner, i.e. not using a CultureInfo and instead use the three letter currency code like USD 1,234.56. Then you don't get into the problems of mapping a currency to a culture.
– Martin Liversage
Jul 12 '17 at 16:16
...
How do I discover memory usage of my application in Android?
...system to this point.
Going lower-level, you can use the Debug API to get raw kernel-level information about memory usage: android.os.Debug.MemoryInfo
Note starting with 2.0 there is also an API, ActivityManager.getProcessMemoryInfo, to get this information about another process: ActivityManager.g...
How do I give text or an image a transparent background using CSS?
...n't support all types of content nor full layout flexibilty. The envelope/letter example above would be hard to pull off with CSS3 because of the independently repeating edges and center-fill(s). Also, keep in mind that this answer was originally written 5 years ago, before CSS3 support was widesp...
What is the difference between MVC and MVVM? [closed]
...probably where the second acronym originated, MVVM. Don't be fooled by the letters, by the omission of the C. Controllers are still there. They need to be. Nothing gets removed. We just add one thing: statefulness, data cached on the client (and along with it intelligence to handle that data). That ...
What is the difference between a URI, a URL and a URN?
... are a standard for identifying documents using a short string of numbers, letters, and symbols. They are defined by RFC 3986 - Uniform Resource Identifier (URI): Generic Syntax. URLs, URNs, and URCs are all types of URI.
URL -- Uniform Resource Locator
Contains information about how to fetch...