generics | Experiments with Go generics | Functional Programming library

 by   adonovan Go Version: Current License: No License

kandi X-RAY | generics Summary

kandi X-RAY | generics Summary

generics is a Go library typically used in Programming Style, Functional Programming applications. generics has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Quick experiments with Go generics. This is really nice. It addresses the main things I miss about generics, namely. and does so without overwhelming complexity. By comparison, C++'s templates are extremely powerful, but syntactically and semantically quite complex, and historically the error messages have been both confusing and too late. (Templates also lead to considerable bloat in the text segment, but that may be a risk of the Go approach too.) Java's generics are limited to reference types, and thus are no use for efficient algorithms on (say) arrays of integers. Somehow the Go approach seems to do most of what I need while still feeling simple and easy to use. Users will no doubt build generic libraries of collections, of stream processing functions, and of numeric analysis routines. The design space for each is large, and I imagine arriving at simple, efficient, and coherent APIs worthy of the standard library will be an arduous task. But there is no need to hurry. My experiments have tended to parameterize over built-in types, or "any". I should probably spend more time investigating interface-constrained types.
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            kandi-support Support

              generics has a low active ecosystem.
              It has 54 star(s) with 6 fork(s). There are 2 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              generics has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of generics is current.

            kandi-Quality Quality

              generics has no bugs reported.

            kandi-Security Security

              generics has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              generics does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              generics releases are not available. You will need to build from source code and install.

            Top functions reviewed by kandi - BETA

            kandi has reviewed generics and discovered the below as its top functions. This is intended to give you an instant insight into generics implemented functionality, and help decide if they suit your requirements.
            • RuntimeHash computes the runtime hash of key .
            • typehash returns the hash of a pointer .
            Get all kandi verified functions for this library.

            generics Key Features

            No Key Features are available at this moment for generics.

            generics Examples and Code Snippets

            No Code Snippets are available at this moment for generics.

            Community Discussions

            QUESTION

            Why does TypeScript infer this type for the array item with a union of array types?
            Asked 2021-Jun-15 at 19:42

            I'm having trouble understanding why TypeScript is inferring a certain type for an array element when the type is a union type and the types 'overlap'. I've reduced it to this minimum repro:

            ...

            ANSWER

            Answered 2021-Jun-15 at 19:42

            See microsoft/TypeScript#43667 for a canonical answer. This is a design limitation of TypeScript.

            As you might be aware: in TypeScript's structural type system, Child is a subtype of Base even though it is not explicitly declared as such. So every value of type Child is also a value of type Base (although not vice-versa). That means Child | Base is equivalent to Base... although the compiler is not always aggressive about reducing the former to the latter. (Compare this to the behavior with something like "foo" | string, which is always immediately reduced to string by the compiler.)

            Subtype reduction is often desirable, but there are some places where Child | Base's behavior is observably different from Base's, such as excess property checks, IntelliSense hinting, or the sort of unsound type guarding that happens with the in operator. You haven't shown why it matters to you that you are getting a Base as opposed to a Child | Base, but presumably it's one of these observable differences or something like it.

            My advice here is first to think carefully about whether or not you really need this distinction. If so, then you might consider preventing Base from being a subtype of Child, possibly by adding an optional property to it:

            Source https://stackoverflow.com/questions/67986975

            QUESTION

            Recursive generics and Array inference
            Asked 2021-Jun-15 at 13:10

            I'm trying to create a few generic recursive types to modify structure of existing types. I can't tell why the sections inferring arrays and nested objects is not getting triggered. Any idea what I'm doing wrong?

            TS playround link with the below code:

            ...

            ANSWER

            Answered 2021-Jun-15 at 00:56

            Assuming what I mentioned in my comment on your question, the fix is just to simplify your FieldWithConfidence type significantly. Right now it is trying to add a number of additional levels of structure beyond what you seem to want. Here is a version of that type that works as I think you intend:

            Source https://stackoverflow.com/questions/67977500

            QUESTION

            Why are lifetime specifiers not required [sometimes] in Rust for generics?
            Asked 2021-Jun-15 at 11:03

            I was looking at the Microsoft Rust guide and while reading the generics chapters, I came across the following problem.

            Consider the two following pieces of code:

            ...

            ANSWER

            Answered 2021-Jun-14 at 12:47

            QUESTION

            Why do I have to add type when declaring variables that are structs defined with generics?
            Asked 2021-Jun-13 at 10:57

            I have the following code to which I tried to apply generics.

            ...

            ANSWER

            Answered 2021-Jun-13 at 10:57

            You need to do things slightly different when you're defining a struct, and when you're instantiating a struct.

            When you write:

            Source https://stackoverflow.com/questions/67955912

            QUESTION

            Can you Recommend me generics name which is used in service of controller?
            Asked 2021-Jun-13 at 06:58

            i know this convention of generics
            E - Element (used extensively by the Java Collections Framework)
            K - Key
            N - Number
            T - Type
            V - Value
            S,U,V etc. - 2nd, 3rd, 4th types

            But i don't know it when I named service of generics in spring
            For example,this abstract class is used when Datas do select, insert, update, delete in controller
            i want to name B body of reqeust and RB to name body of response Is it okay? Can you Recommend me generics name which is used in service of controller ?

            ...

            ANSWER

            Answered 2021-Jun-13 at 06:58

            If you want to go strictly by the book and the common convention, you may go for below. Note in your writeup you have already mentioned that T should be used for Type and S for Second Type etc..

            public abstract class AbstractService

            However, if you want to make it more explicit and avoid any possible confusion with Second Types etc.., you could use convention like below which explains the context of usage as well.

            public abstract class AbstractService

            Optionally, you may also want to make these look like classes to depict more specific inputs, and go for something like below.

            public abstract class AbstractService

            All options would work, but its usually driven by the convention being followed in your project/enterprise. First one is probably what you are looking for here.

            Please note, while Java will not be unhappy with 2nd and 3rd options mentioned here, if you are a stickler for Code Quality and Static Analysis, Sonar will be unhappy with using such names. It expects you to use either S, T convention, or you may also choose T1, T2 to indicate the two types.

            public abstract class AbstractService

            Between S, T and T1, T2, you should probably go for the S, T convention. Sonar expects type names to follow the pattern '^[A-Z][0-9]?$'

            Hope this helps you decide. If you are confused with options, you can simply go with the 1st one.

            Source https://stackoverflow.com/questions/67955480

            QUESTION

            How to annotate "typeof" inheritor of certain class (not it's instance) in TypeScript?
            Asked 2021-Jun-13 at 04:21

            Assume that

            ...

            ANSWER

            Answered 2021-Jun-13 at 04:21

            Think of the parameter as a constructor instead of a class:

            Source https://stackoverflow.com/questions/67954668

            QUESTION

            Android Kotlin: How do I create an instance of the inherited type using Generics?
            Asked 2021-Jun-13 at 02:29

            Here's a simplified code of what I am doing:

            I have this custom ViewHolder:

            ...

            ANSWER

            Answered 2021-Jun-13 at 02:29

            Due to type erasure, you cannot do this without passing the concrete class to the constructor. Or, to avoid having to use reflection to find and call the constructor, it would be cleaner to give the constructor a function parameter for constructing the ViewHolder, so you can just pass the a constructor reference.

            Example:

            Source https://stackoverflow.com/questions/67954176

            QUESTION

            Django Rest Framework serializer check if exists in related Many to Many fiield
            Asked 2021-Jun-11 at 21:16

            I have a custom User model with a blocked field as

            ...

            ANSWER

            Answered 2021-Jun-11 at 21:16

            You can use SerializerMethodField and calculate it. Get the authenticated user and check if the serialized user is in the blocked list.

            Source https://stackoverflow.com/questions/67943299

            QUESTION

            TypeError at /api/questions/ 'list' object is not callable (Django)
            Asked 2021-Jun-09 at 06:44

            When I go to this http://127.0.0.1:8000/api/questions/ I get

            TypeError at /api/questions/

            'list' object is not callable

            urls.py

            (in project)

            ...

            ANSWER

            Answered 2021-Jun-09 at 06:44

            The DEFAULT_PAGINATION_CLASS setting should be a string not a tuple/list

            Source https://stackoverflow.com/questions/67897654

            QUESTION

            When(How) to use const generic in rust?
            Asked 2021-Jun-09 at 02:56

            I am learning how to use const generics in rust. An easy demo like this: Playground

            Can somebody tell me how to use a const generic array as a return type?

            ...

            ANSWER

            Answered 2021-Jun-09 at 02:56

            The point of const generics is that the size of the array is known at compile-time. If you want a runtime-known size, then that's what Vec is for. Consider

            Source https://stackoverflow.com/questions/67896880

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install generics

            You can download it from GitHub.

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            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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