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The best way to remove duplicate values from NSMutableArray in Objective-C?
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I know this is an old question, but there is a more elegant way to remove duplicates in a NSArray if you don't care about the order.
If we use Object Operators from Key Value Coding we can do this:
uniquearray = [yourarray valueForKeyPath:@"@distinctUnionOfObjects.self"...
?? Coalesce for empty string?
Something I find myself doing more and more is checking a string for empty (as in "" or null) and a conditional operator.
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When should I use uuid.uuid1() vs. uuid.uuid4() in python?
...to make it unique across computers.
You can create duplicates by creating more than 214 uuid1 in less than 100ns, but this is not a problem for most use cases.
uuid4() generates, as you said, a random UUID. The chance of a collision is really, really, really small. Small enough, that you shouldn't...
Is System.nanoTime() completely useless?
...he time actually did. That was a long time ago! leventov's answer offers a more up-to-date perspective.
That post is wrong, and nanoTime is safe. There's a comment on the post which links to a blog post by David Holmes, a realtime and concurrency guy at Sun. It says:
System.nanoTime() is implem...
Initialization of all elements of an array to one default value in C++?
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Get nth character of a string in Swift programming language
...The Substring type was introduced in Swift 4 to make substrings
faster and more efficient by sharing storage with the original string, so that's what the subscript functions should return.
Try it out here
extension StringProtocol {
subscript(offset: Int) -> Character { self[index(startIndex...
echo that outputs to stderr
...the same file: the one file descriptor #2 was originally referring to. For more information see the Bash Hackers Illustrated Redirection Tutorial.
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Best way to convert string to bytes in Python 3?
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Without an argument, an array of size 0 is created.
So bytes can do much more than just encode a string. It's Pythonic that it would allow you to call the constructor with any type of source parameter that makes sense.
For encoding a string, I think that some_string.encode(encoding) is more Pytho...
Entity Framework - Code First - Can't Store List
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Open link in new tab or window [duplicate]
...ner noreferrer" is not mandatory, but it's a recommended security measure. More information can be found in the links below.
Source:
MDN | HTML element <a> | attribute target
About rel=noopener
Opens External Anchors Using rel="noopener"
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