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How can I tell if a DOM element is visible in the current viewport?
Is there an efficient way to tell if a DOM element (in an HTML document) is currently visible (appears in the viewport )?
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Is there a Java reflection utility to do a deep comparison of two objects?
... of clone() operations inside a large project and I'm wondering if there is an existing class somewhere that is capable of taking two objects of the same type, doing a deep comparison, and saying if they're identical or not?
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What is the exact problem with multiple inheritance?
... next version of C# or Java. C++ folks, who are fortunate enough to have this ability, say that this is like giving someone a rope to eventually hang themselves.
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Under what circumstances are linked lists useful?
Most times I see people try to use linked lists, it seems to me like a poor (or very poor) choice. Perhaps it would be useful to explore the circumstances under which a linked list is or is not a good choice of data structure.
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How can I propagate exceptions between threads?
We have a function which a single thread calls into (we name this the main thread). Within the body of the function we spawn multiple worker threads to do CPU intensive work, wait for all threads to finish, then return the result on the main thread.
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What is the appropriate HTTP status code response for a general unsuccessful request (not an error)?
...0 for business rules. Don't return 2xx if the order was not accepted. HTTP is an application protocol, never forget that. If you return 2xx the client can assume the order was accepted, regardless of any information you send in the body.
From RESTful Web Services Cookbook:
One common mistake th...
How do you find out the type of an object (in Swift)?
...ner-cases, it's useful to be able to actually find out what type something is. I know the debugger can show you some type information, and you can usually rely on type inference to get away with not specifying the type in those situations, but still, I'd really like to have something like Python's ...
Difference between viewDidLoad and viewDidAppear
What is the difference between viewDidLoad and viewDidAppear ? What kind of initialization or custom code goes into those functions?
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What's the Hi/Lo algorithm?
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The basic idea is that you have two numbers to make up a primary key- a "high" number and a "low" number. A client can basically increment the "high" sequence, knowing that it can then safely generate keys from the entire range of the previ...
How to check for an active Internet connection on iOS or macOS?
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Important: This check should always be performed asynchronously. The majority of answers below are synchronous so be careful otherwise you'll freeze up your app.
Swift
1) Install via CocoaPods or Carthage: https://github.com/ashleymil...