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Should I instantiate instance variables on declaration or in the constructor?
Is there any advantage for either approach?
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Best practice for partial updates in a RESTful service
I am writing a RESTful service for a customer management system and I am trying to find the best practice for updating records partially. For example, I want the caller to be able to read the full record with a GET request. But for updating it only certain operations on the record are allowed, like ...
Cleaner way to update nested structures
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Why does this code using random strings print “hello world”?
The following print statement would print "hello world".
Could anyone explain this?
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Android image caching
How can I cache images after they are downloaded from web?
18 Answers
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Understanding the map function
Apply function to every item of iterable and return a list of the results. If additional iterable arguments are passed, function must take that many arguments and is applied to the items from all iterables in parallel.
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Get users by name property using Firebase
I'm trying to create an application where I can get/set data in specific users accounts and I was tempted by Firebase.
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How to create circle with Bézier curves?
We have a start point (x, y) and a circle radius. There also exists an engine that can create a path from Bézier curve points.
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What's the best practice for primary keys in tables?
When designing tables, I've developed a habit of having one column that is unique and that I make the primary key. This is achieved in three ways depending on requirements:
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How to find the nearest parent of a Git branch?
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