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How can I convert an RGB image into grayscale in Python?
... do it all in matplotlib.
Background:
http://matplotlib.sourceforge.net/api/colors_api.html
http://en.wikipedia.org/wiki/HSL_and_HSV
Alternatively, you could use PIL or the builtin colorsys.rgb_to_yiq() to convert to a colorspace with a true luma value. You could also go all in and roll your o...
What is the concept of erasure in generics in Java?
...al" argument as well? Answer: type erasure. This sort of thing pollutes an API. Out of interest, have you used .NET generics much? (continued)
– Jon Skeet
Dec 29 '09 at 13:18
5
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Why should the “PIMPL” idiom be used? [duplicate]
... product that is shipped as a series of libraries that are accessed via an API that the customer's code is compiled against and linked to.
We did this with the rewrite of IONAs Orbix 3.3 product in 2000.
As mentioned by others, using his technique completely decouples the implementation from the i...
How do I create a right click context menu in Java Swing?
... is a bit old - as are the answers (and the tutorial as well)
The current api for setting a popupMenu in Swing is
myComponent.setComponentPopupMenu(myPopupMenu);
This way it will be shown automagically, both for mouse and keyboard triggers (the latter depends on LAF). Plus, it supports re-using ...
What is the difference between re.search and re.match?
...Well, that's goofy. Why call it match? Is it a clever maneuver to seed the API's with unintuitive names to force me to read the documentation? I still won't do it! Rebel!
– Sammaron
Sep 16 '16 at 15:14
...
How to call Android contacts list?
...ppears that a lot of this code has been deprecated with the recent android APIs. Does someone have an updated version?
– yamspog
Jul 23 '10 at 20:03
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Real world use of JMS/message queues? [closed]
...ilter the output based on contextual information (e.q. by app server name, api call, log level, userid, message type, etc...). I also colorized the output.
Debug logging to file. Same as above, only specific pieces were pulled out using filters, and logged to file for general logging.
Alerting. Agai...
HTML5 record audio to file
...
Update now Chrome also supports MediaRecorder API from v47. The same thing to do would be to use it( guessing native recording method is bound to be faster than work arounds), the API is really easy to use, and you would find tons of answers as to how to upload a blob fo...
How to $http Synchronous call with AngularJS
...
$http
.post("/api/EmployeeApi/Create", angular.toJson(employee))
.success(function (response, status, headers, config) {
deferred.resolve(response, status, headers, config);
...
What is “lifting” in Scala?
...rovides unlift to help with construction of JSON serialisers:
import play.api.libs.json._
import play.api.libs.functional.syntax._
case class Location(lat: Double, long: Double)
implicit val locationWrites: Writes[Location] = (
(JsPath \ "lat").write[Double] and
(JsPath \ "long").write[Double...