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Difference between Inheritance and Composition
...ance is java.util.Stack, which currently extends java.util.Vector. This is now considered a blunder. A stack "is-NOT-a" vector; you should not be allowed to insert and remove elements arbitrarily. It should've been composition instead.
Unfortunately it's too late to rectify this design mistake, sin...
Adding external library in Android studio
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I know it by experience and inspecting.... But there are docs available : developer.android.com/sdk/installing/studio-build.html
– malcubierre
Sep 2 '14 at 6:28
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Complex CSS selector for parent of active child [duplicate]
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The CSS Selectors 4 spec has now included the ability for selectors to ascend. stackoverflow.com/q/1014958/392
– Dan Herbert
Nov 22 '11 at 17:22
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What does it mean if a Python object is “subscriptable” or not?
...which can be replayed.
For example, see: Application Scripting Framework
Now, if Alistair didn't know what he asked and really meant "subscriptable" objects (as edited by others), then (as mipadi also answered) this is the correct one:
A subscriptable object is any object that implements the __ge...
Peak detection in a 2D array
...measuring pressure under a dogs paw. I use Python for my data analysis and now I'm stuck trying to divide the paws into (anatomical) subregions.
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The EXECUTE permission was denied on the object 'xxxxxxx', database 'zzzzzzz', schema 'dbo'
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Hi, I know it was a bit time ago, but I have a question. Might such action have some security problems? Does it opens sp to be used for everyone?
– Valentyn Vynogradskiy
Aug 4 '14 at 10:39
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Django Rest Framework File Upload
...ood question. Reading RFC-2616 provides a subtlety I wasn't aware of until now. "The fundamental difference between the POST and PUT requests is reflected in the different meaning of the Request-URI. The URI in a POST request identifies the resource that will handle the enclosed entity. That resourc...
AngularJS : Initialize service with asynchronous data
...troller('MainCtrl', function($scope,MyService) {
console.log('Promise is now resolved: '+MyService.doStuff().data)
$scope.data = MyService.doStuff();
});
I've made an example at plnkr: http://plnkr.co/edit/GKg21XH0RwCMEQGUdZKH?p=preview
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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...
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...