Positivism asserted that allcultures move through progressive stages of development: first the-ological, then metaphysical, and finally “positive.”

为什么Akka(Actor模型)在中国不温不火？

为什么有些程序语言的类型推断可以推断函数参数，有些不会，哪种更好？

代数数据类型是什么？

Additionally, by delegating the HTTP code generation to Smithy4s we make an explicit choice to deal only with high level entities within our domain. In other words, when we write business logic we don't think about

Difference between Map and HashMap The Map is an interface in Java used to map the key-pair values. It is used to insert, update, remove the elements. Whereas the HashMap is a class of Java collection framework. The Map interface can only be used with an implementing class. It allows to store the values in key-pair combination; it does not allow duplicate keys; however, we can store the duplicate values. Its implementing classes are as follows: HashMap Hashtable TreeMap ConcurrentHashMap LinkedHashMap HashMap is a powerful data structure in Java used to store the key-pair values. It maps a value by its associated key. It allows us to store the null values and null keys. It is a non-synchronized class of Java collection.

Finally, and as fundamentally as there is a numerical memory and a dia-lectical memory, there is a geometry of memory too. Almost every monas-tic mnemotechnical scheme—ladders, roses, buildings, maps—was based ongeometrical figures: squares, rectangles, triangles, circles, and complex refor-mations of these, including three-dimensional structures

Capitalization conveys a certain distinction, the elevated position of humans and their creations in the hierarchy of beings. Biologists have widely adopted the convention of not capital-izing the common names of plants and animals unless they include the name of a human being or an official place name. Thus, the first blossoms of the spring woods are written as bloodroot and the pink star of a California woodland is Kellogg’s tiger lily. This seemingly trivial grammatical rulemaking in fact expresses deeply held assump-tions about human exceptionalism, that we are somehow different and indeed better than the other species who surround us. Indigenous ways of understanding recognize the personhood of all beings as equally important, not in a hierarchy but a circle.

I mean how are they gonna learn the ten commandments if they don't ever command each other you know no kidding order is necessary it's a moral duh so it's exactly the opposite you know of 00:42:38 the the opinions that most people would have today

ZLayer provided a very clean solution to the problems developers were havingwith ZIO Environment—not perfect, mind you, and I don’t think any solutionprior to Scala 3 can be perfect (every solution in the design space has differenttradeoffs). This solution became even better when the excellent consultancySeptimal Mind donated Izumi Reflect to the ZIO organization

Has can be thought of as a type-indexed heterogeneous map, which is type safe,but requires access to compile-time type tag information. ZLayer can be thoughtof as a more powerful version of Java and Scala constructors, which can buildmultiple services in terms of their dependencies.

Our elders say that ceremonies are the way we “remember to remember,”

Sunlight streamed through the hole from the Skyworld, allowing the seeds to flourish. Wild grasses, flowers, trees, and medicines spread everywhere.

he Western tradition has never been more appealingly portrayed than in Rembrandt’s 1653 painting “Aristotle with a Bust of Homer.” Whether you stand in front of it at the Metropolitan Museum or look at it online, the painting turns you into a link in a chain that goes back three thousand years.

Analog zur Struktur des Zettelkastens baut Luhmanns Systemtheorie nicht auf Axiome und bietet keine Hierarchien von Begriffen oder Thesen. Zentrale Begriffe sind, ebenso wie die einzelnen Zettel, stark untereinander vernetzt und gewinnen erst im Kontext Bedeutung.

We can also define these properties for data types that we do not control, for example providing a custom way of hashing a data type implemented by someone else

However, there is a definite trade off in these three snippets. The first one is overly specific but is understandable to any Scala programmer. The last one is beautiful and elegant if you understand the necessary concepts but incomprehensible otherwise.

ZIO ecosystem libraries generally do not directly expose any functional abstractions but still expose a highly compositional interface because their design is based on algebraic properties like this. Users don't have to learn about these abstractions unless they want to, they just get to benefit from better library design.

Uber and Booking.com’s ecosystem was originally JVM-based but they expanded to support Python models/scripts. Spotify made heavy use of Scala in the first iteration of their platform until they received feedback like:some ML engineers would never consider adding Scala to their Python-based workflow.

“Although a seemingly mundane and simple innovation, Linnaeus' use of index cards marks a major shift in how eighteenth-century naturalists thought about the order of nature,” says Mueller-Wille. The natural world was no longer ordered on a fixed, linear scale, but came to be seen as a map-like natural system of multiple affinities.

The exception can be avoided by using ? operator on the nullable value instead:

By harnessing emotion, the individual can move up the steps of

Programming languages These will probably expose my ignorance pretty nicely.

Scala is ten times faster than Python

Mixin’ traits ‘statically’

val singingPerson = new Person with Singerperson.sing

A Scala function that’s created with val is very different than a method created with def.

By all accounts, creating a Scala def method creates a standard method in a Java class

if i != 0

if i != 0

a val function, all you’re really doing with code like this is assigning a variable name to an anonymous function

val f = (a:Int, b:Int) => a+b

A block of code with one or more case expressions is a legal way to define an anonymous function

Ordered特质更像是rich版的Comparable接口

echo "deb https://dl.bintray.com/sbt/debian /" | sudo tee -a /etc/apt/sources.list.d/sbt.list sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2EE0EA64E40A89B84B2DF73499E82A75642AC823 sudo apt-get update sudo apt-get install sbt

Vmay only extenduniversaltraitsTraits in Scala extendAnyRefby default, so value classes cannot extend them. Traitswhich explicitly extendAnyare called universal, they do not extendAnyRefand valueclasses can extend them. Like value classes and for the same reasons, universal traitsneed to be ephemeral.

On line 2,xneeds to be boxed because the expected type of the expression isAnyValand primitives on the JVM do not have a common supertype.

The stringSingleton() method of the Module object appears to be indistinguishable from a first-class function value. But the appearances are deceptive. The method isn’t free-standing: we could have used this in its body and it would have referred to the Module singleton object, even after the import. And it’s not the method which is passed to map — instead a transient function value is implicitly created to invoke the stringSingleton() method (this is a process known as eta-expansion) and it’s that function-value which is passed to map.

Here the method subtypePolymorphic() has no type parameters, so it’s parametrically monomorphic. Nevertheless, it can be applied to values of more than one type as long as those types stand in a subtype relationship to the fixed Base type which is specified in the method signature — in other words, this method is both parametrically monomorphic and subtype polymorphic.

Figuring out all subclasses of a class is called Class Hierarchy Analysis, and doing static CHA in a language with dynamic code loading is equivalent to solving the Halting Problem.

FUNCTIONS WITH SIDE EFFECTS SHOULD USE PARENTHESES

Keeping unpure functions clearly named and organized in such a way that they can be easily identified versus pure functions is a common goal of modularizing and organizing Scala applications.

Even though the value given to the match expression has the type Any, the data it is storing was created as an Int. The match expression was able to match based on the actual type of the value, not just on the type that it was given. Thus, the integer 12180, even when given as type Any, could be correctly recognized as an integer and formatted as such.

To prevent errors from disrupting your match expression, use a wildcard match-all pattern or else add enough patterns to cover all possible inputs. A wildcard pattern placed as the final pattern in a match expression will match all possible input patterns and prevent a scala.MatchError from occurring.

| case

An alternate form of creating a 2-sized tuple is with the relation operator (->). This is a popular shortcut for representing key-value pairs in tuples:

val pattern(amountText) = input