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Scala type programming resources
...s implemented as follows: type eval = S#eval#apply[T]. This is essentially calling the eval type of the trait's parameter S, and calling apply with parameter T on the result. Note, S is guaranteed to have an eval type because the parameter specifies it to be a subtype of Lambda. Similarly, the resul...
Is SecureRandom thread safe?
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The current implementation of SecureRandom is thread safe, specifically the two mutating methods nextBytes(bytes[]) and setSeed(byte[]) are synchronized.
Well, as far as I've been able to tell, all mutating methods are eventually routed through those two methods, and SecureRandom overrides...
How do I write a short literal in C++?
...t32_t value); // 1
void func(std::uint16_t value); // 2
func(0x1234U); // calls 1
func(0x1234_u); // calls 2
// also
inline std::int16_t operator "" _s(unsigned long long value)
{
return static_cast<std::int16_t>(value);
}
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Setting dynamic scope variables in AngularJs - scope.
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I don't quite recall actually. I think it was because model.assign does not trigger data binding, so you need to apply manually once you have done everything you need to do. Try it out and see if it is possible to remove it or not (might hav...
What's to stop malicious code from spoofing the “Origin” header to exploit CORS?
...header is an HTTP forbidden header name that cannot be modified programmatically. Which means you can modify it in about 8 seconds using Modify Headers for Google Chrome.
To test this, I set up two Client domains and one Server domain. I included a CORS whitelist on the Server, which allowed CORS r...
Using Rails serialize to save hash to database
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Rails 4 has a new feature called Store, so you can easily use it to solve your problem. You can define an accessor for it and it is recommended you declare the database column used for the serialized store as a text, so there's plenty of room. The ori...
How to import local packages without gopath
...LE=on
go mod init
go mod vendor # if you have vendor/ folder, will automatically integrate
go build
This method creates a file called go.mod in your projects directory. You can then build your project with go build. If GO111MODULE=auto is set, then your project cannot be in $GOPATH.
Edit 2: The...
Pass props to parent component in React.js
...hild in the parent, the child could pass all the dom nodes directly in the callback.
The component has an interface (props) and the parent should not assume anything about the inner working of the child, including its inner DOM structure or which DOM nodes it declares refs for. A parent using a ref...
Where to define custom error types in Ruby and/or Rails?
...m error types in a Ruby library (gem) or Ruby on Rails application? Specifically:
5 Answers
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Different types of thread-safe Sets in Java
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1) The CopyOnWriteArraySet is a quite simple implementation - it basically has a list of elements in an array, and when changing the list, it copies the array. Iterations and other accesses which are running at this time continue with the old array, avoiding necessity of synchronization betwee...