Structures | Functional type classes for Scala | Functional Programming library

 by   mpilquist Scala Version: Current License: Non-SPDX

kandi X-RAY | Structures Summary

kandi X-RAY | Structures Summary

Structures is a Scala library typically used in Programming Style, Functional Programming applications. Structures has no bugs, it has no vulnerabilities and it has low support. However Structures has a Non-SPDX License. You can download it from GitHub.

Structures is an experiment. It is focused on minimizing the number of type classes and integrating them closely with Scala language features and the standard library. It is entirely possible that this experiment fails in the sense that it no longer should exist as a library. In which case, the overall effort would still be valuable by demonstrating why a smaller subset of type classes is not useful.
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            kandi-support Support

              Structures has a low active ecosystem.
              It has 186 star(s) with 17 fork(s). There are 22 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 0 open issues and 2 have been closed. On average issues are closed in 9 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of Structures is current.

            kandi-Quality Quality

              Structures has no bugs reported.

            kandi-Security Security

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

            kandi-License License

              Structures has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

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

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            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Structures
            Get all kandi verified functions for this library.

            Structures Key Features

            No Key Features are available at this moment for Structures.

            Structures Examples and Code Snippets

            Nested Structures
            npmdot img1Lines of Code : 17dot img1no licencesLicense : No License
            copy iconCopy
            const { fromJS } = require('immutable');
            const nested = fromJS({ a: { b: { c: [3, 4, 5] } } });
            // Map { a: Map { b: Map { c: List [ 3, 4, 5 ] } } }
            
            
            const { fromJS } = require('immutable');
            const nested = fromJS({ a: { b: { c: [3, 4, 5] } } });
            
            co  
            Apply a function to a sequence of nested structures .
            pythondot img2Lines of Code : 109dot img2License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def map_structure(func, *structure, **kwargs):
              """Creates a new structure by applying `func` to each atom in `structure`.
            
              Refer to [tf.nest](https://www.tensorflow.org/api_docs/python/tf/nest)
              for the definition of a structure.
            
              Applies `fun  
            Asserts that two nest structures are the same .
            pythondot img3Lines of Code : 100dot img3License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def assert_same_structure(nest1, nest2, check_types=True,
                                      expand_composites=False):
              """Asserts that two structures are nested in the same way.
            
              Refer to [tf.nest](https://www.tensorflow.org/api_docs/python/tf/nest)
              for  
            Checks if two structures are the same .
            pythondot img4Lines of Code : 16dot img4License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def is_same_structure(structure1,
                                  structure2,
                                  check_values=False):
              """Check two structures for equality, optionally of types and of values."""
              try:
                nest.assert_same_structure(structure1, structure2,  

            Community Discussions

            QUESTION

            Multiple XSD implementing the same targetNamespace - is this correct?
            Asked 2021-Jun-15 at 10:35

            I implemented an xsd scanner, which creates an targetNamespace= catalog. Includes are filtered, so the catalog has only the root files of the targetNamespace. With this catalog I'm resolving the required files (using a LSResourceResolver) to validate incoming xml files.

            Map

            ...

            ANSWER

            Answered 2021-Jun-09 at 23:44

            My question is, is it correct to specifiy multiple XSD file implementing the same namespace with different xsd structures ?

            Yes, that is a valid use of XML schema. A schema does not have to be represented by a single XSD file. Please see https://www.w3.org/TR/xmlschema-0/#SchemaInMultDocs and https://www.w3.org/TR/xmlschema-0/#import

            You may also find this thread helpful: What's the difference between xsd:include and xsd:import?

            Source https://stackoverflow.com/questions/67867769

            QUESTION

            OpenAPI path/query parameters nested structure serialization
            Asked 2021-Jun-15 at 10:35

            In the OpenAPI docs about parameter serialization there's a short section about how to serialize query, path, header and cookie parameters with different styles. The schema of these parameters are described as OpenAPI flavoured json schema, which allows infinite nesting of objects and arrays. I haven't found any mention about how to deal with these in the docs:

            https://swagger.io/docs/specification/serialization/

            Let's assume the JSON schema provided for any of the parameters is like this:

            ...

            ANSWER

            Answered 2021-Jun-15 at 10:35

            Short answer: It's undefined behavior.


            Most OpenAPI serialization styles are based on RFC 6570, which provides guidance only for:

            • primitive values,
            • arrays of primitives,
            • simple non-nested objects (with primitive properties).

            In case of other types of values (nested objects, objects containing arrays, nested arrays, arrays of objects) the behavior is undefined.


            Similarly, OpenAPI's own deepObject style is currently defined only for simple objects but not for arrays or nested objects. Here are some related comments from the OpenAPI Specification authors/maintainers:

            By the way, is there a reason we couldn't have deepObject work for arrays too? [...]

            Darrel: Supporting arrays as you describe was my intent. I was supposed to find some canonical implementation to use as a guideline for the behavior, but didn't get around to it.

            Ron: If we end up supporting the exploded array notation, it needs to be clear that the first index is 0 (or 1, or -1, or whatever).

            (source)

            Ron: when we defined deepObject in the spec, we explicitly chose to not mention what happens when the object has several levels in it, but in our conversations we went with 'not supported'. ​

            (source)

            There's an existing feature request to extend deepObject to support arrays and nested structures:
            Support deep objects for query parameters with deepObject style

            Source https://stackoverflow.com/questions/67745944

            QUESTION

            Angular and ASP.NET Core MVC: "Uncaught SyntaxError: Unexpected token '<'" for index file references when deployed
            Asked 2021-Jun-15 at 06:41

            I have an application using ASP.NET Core MVC and an Angular UI framework.

            I can run the application in IIS Express Development Environment without issue. When I switch to the IIS Express Production environment or deploy to an IIS host, my index referenced files cannot be read showing a browser error:

            Uncaught SyntaxError: Unexpected token '<'

            These pages look like they are loading the index page as opposed to the .js or .css files.

            Here is a snippet of the underlying runtime.js as it should be loaded into browser, it is not loaded with index.html.

            ...

            ANSWER

            Answered 2021-Jun-14 at 14:39

            QUESTION

            Is it possible to use an Abstract Base Class as a mixin?
            Asked 2021-Jun-15 at 03:43

            TL;DR: Interested in knowing if it's possible to use Abstract Base Classes as a mixin in the way I'd like to, or if my approach is fundamentally misguided.

            I have a Flask project I've been working on. As part of my project, I've implemented a "RememberingDict" class. It's a simple subclass of dict, with a handful of extra features tacked on: it remembers its creation time, it knows how to pickle/save itself to a disk, and it knows how to open/unpickle itself from a disk:

            ...

            ANSWER

            Answered 2021-Jun-15 at 03:43

            You can get around the problems of subclassing dict by subclassing collections.UserDict instead. As the docs say:

            Class that simulates a dictionary. The instance’s contents are kept in a regular dictionary, which is accessible via the data attribute of UserDict instances. If initialdata is provided, data is initialized with its contents; note that a reference to initialdata will not be kept, allowing it be used for other purposes.

            Essentially, it's a thin regular-class wrapper around a dict. You should be able to use it with multiple inheritance as an abstract base class, as you do with AbstractRememberingDict.

            Source https://stackoverflow.com/questions/67978006

            QUESTION

            Sorting technique C
            Asked 2021-Jun-14 at 17:34

            I am into programming from past 7-8 months and I generally use selection sort whenever I want to sort arrays or structures. So I got idea and implemented it. selection sort find max OR min value in each loop and place it at one of the border (depends on max or min) and make it out of scope. So I thought why not find max AND min in each loop and move them to borders (min-left and max-right) and reduce the scope from both side by value 1. It would have half of previous time complexity i guess. Here is the code:

            ...

            ANSWER

            Answered 2021-Jun-14 at 15:54

            It would have half of previous time complexity i guess.

            O(0.5 * n^2) is still O(n^2). A good qsort() is expected O(n* ln(n)).

            Is this efficient enough or should I stick with selection sort and qsort.

            Tough to beat decades of many programmers experience.

            Keep in mind qsort() does not have to use the quick sort algorithm. A good qsort() may use a combination of algorithms.

            Source https://stackoverflow.com/questions/67973299

            QUESTION

            Lookahead in regular expressions
            Asked 2021-Jun-14 at 17:03

            I was taking freecodecamp.org course on JavaScript data structures, going through the RegExp chapter. I then came across the following assertion:

            "The regular expression /(?=\w{3,6})(?=\D*\d)/ will check whether a password contains between 3 and 6 characters and at least one number". (Here "check" meaning that regExp.test(password) returns true)

            This seems odd to me. First of all, looking around in Stack Exchange, I found in this post that states that A(?=B) is the definition of positive lookahead, and it makes no mention that A (the preceeding expression in the parenthesis) is optional. So, shouldn't freecodecamp's example have an expression before the first lookahead?

            I believe that this another example is quite similar to the previously mentioned, but simpler so I will mention it in case the explanation is simpler, too:

            Why does (?=\w)(?=\d), when checked against the string "1", returns true?, Shouldn't it look for an alphanumeric character followed by a numeric character?

            PS: After a thought, I hypothesized that my first example checks both lookahead patterns independently (i.e. first it checks whether the string is made of three to six characters, returns true, then checks whether there is an alpha numeric character, and finally since both searchings returned true, the whole regexp test returns true). But this doesn't seem to be coherent with the definition mentioned in the post I've linked. Is there a more general definition or algorithm which the computer "internally" uses to deal with lookaheads?

            ...

            ANSWER

            Answered 2021-Jun-14 at 16:03
            Definitions

            Lookaround are similar to word-boundary metacharacters like \b or the anchors ˆ and $ in that they don’t match text, but rather match positions within the text.

            Positive lookahead peeks forward in the text to see if its subexpression can match, and is successful as a regex component if it can. Positive lookahead is specified with the special sequence (?=...).

            Lookaround do not cosume text

            An important thing to understand about lookaround constructs is that although they go through the motions to see if their subexpression is able to match, they don’t actually “consume” any text.

            Examples

            Source https://stackoverflow.com/questions/67971883

            QUESTION

            How to properly apply decltype together with SFINAE?
            Asked 2021-Jun-14 at 12:32

            I wrote a template wrapper that should find out if the class owns the function.

            ...

            ANSWER

            Answered 2021-Jun-14 at 12:32

            I use a vector there and expected that it will pass

            The problem is in std::declval().push_back(), there's no push_back taking nothing for std::vector.

            You need to pass argument to push_back, e.g.

            Source https://stackoverflow.com/questions/67916905

            QUESTION

            Why we need to put parenthesis when giving a template type
            Asked 2021-Jun-13 at 20:31

            Hello I am trying to understand this piece of code:

            ...

            ANSWER

            Answered 2021-Jun-13 at 20:31

            Why we need to put parenthesis when giving a template type sort(a.begin(), a.end(), greater());

            std::greater is a class template. std::greater is an instance of that class template, and is a type (more specifically, a class type). std::greater() is a temporary object (an instance of the type that is the instance of the template). The parentheses are syntax for value initialisation.

            It is not possible to pass a type as an argument to a function (however, it would be possible to pass a type as a template argument to a function template). It is possible to pass a temporary object as an argument to a function.

            So, we use the parentheses so that an object is created that we pass as an argument.

            PS: I said object which is a class specific term but I think in structures, it may be called that way in c++.

            If by structure you mean a struct: Structs are classes (that have been declared with the class-key struct).

            Instances of all types are objects in C++.

            Source https://stackoverflow.com/questions/67961986

            QUESTION

            redis development: How do I add/enable debug messages when running unit tests
            Asked 2021-Jun-13 at 00:45

            I am adding a command to the redis code and when I run the unit test, I want to see the content of some of the data structures. I am running the test like this: ./runtest --single unit/acl. I have also added server log like this:

            ...

            ANSWER

            Answered 2021-Jun-13 at 00:45

            Be sure to execute make after modifying the source code.

            You will not see serverLog() messages when you execute the test runner; they are from redis-server.

            For test runs, redis-server logs are written to tests/tmp//stdout.

            Development cycle:

            1. Edit source code
            2. Write tests
            3. Compile source code
              • make
            4. Run tests
              • ./runtest (add your arguments)
            5. Inspect redis-server logs
              • less tests/tmp/*/stdout
            6. Delete test artifacts
              • rm -rf tests/tmp/*

            Source https://stackoverflow.com/questions/67952934

            QUESTION

            Get class name based on address of its instance in another process
            Asked 2021-Jun-12 at 20:23

            I'm looking for anything that can help me deviate string GetRTTIClassName(IntPtr ProcessHandle, IntPtr StructAddress). The function would use another (third-party) app's process handle to get names of structures located at specific addresses in its memory (should there be found any).

            All of RTTI questions/documentation I can find relate to it being used in the same application, and have nothing to do with process interop. The only thing close to what I'm looking for is this module in Cheat Engine's source code (which is also how I found out that it's possible in the first place), but it has over a dozen of nested language-specific dependencies, let alone the fact that Lazarus won't let me build it outside of the project context anyway.

            If you know of code examples, libraries, documentation on what I've described, or just info on accessing another app's low-level metadata (pardon my French), please share them. If it makes a difference, I'm targeting C#.

            Edit: from what I've gathered, the way runtime information is stored depends on the compiler, so I'll mention that the third-party app I'm "exploring" is a MSVC project.

            As I understand, I need to:

            1. Get address of the structure based on address of its instance;
            2. Starting from structure address, navigate through pointers to find its name (possibly "decorated").

            I've also found a more readable C# implementation and a bunch of articles on reversing (works for step 2), but I can't seem to find step 1.

            I'll update/comment as I find more info, but right now I'm getting a headache just digging into this low-level stuff.

            ...

            ANSWER

            Answered 2021-Jun-12 at 20:23

            It's a pretty long pointer ladder. I've transcribed the solution ReClass.NET uses to clean C# without dependencies.

            Resulting library can be found here.

            Source https://stackoverflow.com/questions/67547313

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

            Vulnerabilities

            No vulnerabilities reported

            Install Structures

            You can download it from GitHub.

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