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Difference between abstraction and encapsulation?
What is the precise difference between encapsulation and abstraction?
39 Answers
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user authentication libraries for node.js?
...an do password authentication for a user (using a custom backend auth DB), and associate that user with a session.
15 Answe...
Django migration strategy for renaming a model and relationship fields
...ome errors if you don't update the names where it's imported e.g. admin.py and even older migration files (!).
Update: As ceasaro mentions, newer versions of Django are usually able to detect and ask if a model is renamed. So try manage.py makemigrations first and then check the migration file.
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What is the difference between id and class in CSS, and when should I use them? [duplicate]
Here I gave an id to the div element and it's applying the relevant CSS for it.
15 Answers
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Add regression line equation and R^2 on graph
I wonder how to add regression line equation and R^2 on the ggplot . My code is:
9 Answers
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Simple Digit Recognition OCR in OpenCV-Python
...v2). It is just for learning purposes. I would like to learn both KNearest and SVM features in OpenCV.
3 Answers
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Key hash for Android-Facebook app
I'm working on an Android app, in which I want to integrate a Facebook
posting feature. I downloaded the Facebook-Android SDK, and I got
the readme.md (text file) in there, in which it is mentioned to generate
the key hash for Android. How do I generate it?
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Android Fragments. Retaining an AsyncTask during screen rotation or configuration change
I'm working on a Smartphone / Tablet app, using only one APK, and loading resources as is needed depending on screen size, the best design choice seemed to be using Fragments via the ACL.
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Passing Data between View Controllers
I'm new to iOS and Objective-C and the whole MVC paradigm and I'm stuck with the following:
46 Answers
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What is aria-label and how should I use it?
...how will he hear close? What can I do in my browser (chrome) to hear this? And how can a blind person select this button if he have no idea where it is?
– Salvador Dali
Feb 26 '14 at 11:57
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