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When should one use RxJava Observable and when simple Callback on Android?
...});
The RxJava variant is not much better than the Callback variant. For now, let's ignore the error handling.
Let's take a list of photos:
RxJava:
api.getUserPhotos(userId)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.flatMap(new Func1<List<Photo>, Observab...
Is there a way to detect if a browser window is not currently active?
...ecommendation status thanks to the W3C. The Page Visibility API (on MDN) now allows us to more accurately detect when a page is hidden to the user.
document.addEventListener("visibilitychange", onchange);
Current browser support:
Chrome 13+
Internet Explorer 10+
Firefox 10+
Opera 12.10+ [read...
How do I clear stuck/stale Resque workers?
...annoying. But this followed by heroku restart seemed to do the trick. It now shows the correct number of workers.
– Brian Armstrong
Aug 14 '12 at 5:27
...
How can I respond to the width of an auto-sized DOM element in React?
...olution is to use a library for this like react-measure.
Update: there is now a custom hook for resize detection (which I have not tried personally): react-resize-aware. Being a custom hook, it looks more convenient to use than react-measure.
import * as React from 'react'
import Measure from 're...
jQuery vs document.querySelectorAll
...t would be very hard to do in regular javascript .
However , as far as I know, you can achieve the same result with document.querySelector or document.querySelectorAll , which are supported in Internet Explorer 8 and above.
...
What can you use Python generator functions for?
...enerator functions, those that have a yield statement in them. I want to know what types of problems that these functions are really good at solving.
...
How to process SIGTERM signal gracefully?
... to use solution:
import signal
import time
class GracefulKiller:
kill_now = False
def __init__(self):
signal.signal(signal.SIGINT, self.exit_gracefully)
signal.signal(signal.SIGTERM, self.exit_gracefully)
def exit_gracefully(self,signum, frame):
self.kill_now = True
if __name_...
When should iteritems() be used instead of items()?
....items() returned a list of (key, value) pairs. In Python 3.x, .items() is now an itemview object, which behaves different - so it has to be iterated over, or materialised... So, list(dict.items()) is required for what was dict.items() in Python 2.x.
Python 2.7 also has a bit of a back-port for key...
Angular JS: What is the need of the directive’s link function when we already had directive’s contro
... link and controller functions and reading quite a lot about them, I think now I have the answer.
First lets understand,
How do angular directives work in a nutshell:
We begin with a template (as a string or loaded to a string)
var templateString = '<div my-directive>{{5 + 10}}</div>...
Git stash pop- needs merge, unable to refresh index
...ash because I merged a branch which apparently conflicts with my stash and now my stash is seemingly unable to be popped.
1...