dry-transaction | Business transaction DSL | Functional Programming library

 by   dry-rb Ruby Version: v0.15.0 License: MIT

kandi X-RAY | dry-transaction Summary

kandi X-RAY | dry-transaction Summary

dry-transaction is a Ruby library typically used in Programming Style, Functional Programming applications. dry-transaction has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Business transaction DSL

            kandi-support Support

              dry-transaction has a low active ecosystem.
              It has 416 star(s) with 53 fork(s). There are 25 watchers for this library.
              It had no major release in the last 12 months.
              There are 8 open issues and 59 have been closed. On average issues are closed in 165 days. There are 2 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of dry-transaction is v0.15.0

            kandi-Quality Quality

              dry-transaction has 0 bugs and 0 code smells.

            kandi-Security Security

              dry-transaction has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              dry-transaction code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              dry-transaction is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              dry-transaction releases are available to install and integrate.
              It has 1851 lines of code, 78 functions and 45 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

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            dry-transaction Key Features

            No Key Features are available at this moment for dry-transaction.

            dry-transaction Examples and Code Snippets

            No Code Snippets are available at this moment for dry-transaction.

            Community Discussions


            How do purely functional languages handle index-based algorithms?
            Asked 2022-Apr-05 at 12:51

            I have been trying to learn about functional programming, but I still struggle with thinking like a functional programmer. One such hangup is how one would implement index-heavy operations which rely strongly on loops/order-of-execution.

            For example, consider the following Java code:



            Answered 2022-Mar-07 at 21:17

            This is not an index-heavy operation, in fact you can do this with a one-liner with scanl1 :: (a -> a -> a) -> [a] -> [a]:

            Source https://stackoverflow.com/questions/71387267


            Haskell comparing two lists' lengths but one of them is infinite?
            Asked 2022-Mar-22 at 20:54

            I want to write a function that checks if the first list is longer than the second list and one of them can be infinite. However I can't find a working solution.



            Answered 2022-Mar-22 at 20:54

            Plain old natural numbers will not do the trick, because you can't calculate the natural number length of an infinite list in finite time. However, lazy natural numbers can do it.

            Source https://stackoverflow.com/questions/71565429


            Why is `forever` in Haskell implemented this way?
            Asked 2022-Feb-05 at 20:34

            Haskell provides a convenient function forever that repeats a monadic effect indefinitely. It can be defined as follows:



            Answered 2022-Feb-05 at 20:34

            The execution engine starts off with a pointer to your loop, and lazily expands it as it needs to find out what IO action to execute next. With your definition of forever, here's what a few iterations of the loop like like in terms of "objects stored in memory":

            Source https://stackoverflow.com/questions/70990108


            Memoize multi-dimensional recursive solutions in haskell
            Asked 2022-Jan-13 at 14:28

            I was solving a recursive problem in haskell, although I could get the solution I would like to cache outputs of sub problems since has over lapping sub-problem property.

            The question is, given a grid of dimension n*m, and an integer k, how many ways are there to reach the gird (n, m) from (1, 1) with not more than k change of direction?

            Here is the code without of memoization



            Answered 2021-Dec-16 at 16:23

            In Haskell these kinds of things aren't the most trivial ones, indeed. You would really like to have some in-place mutations going on to save up on memory and time, so I don't see any better way than equipping the frightening ST monad.

            This could be done over various data structures, arrays, vectors, repa tensors. I chose HashTable from hashtables because it is the simplest to use and is performant enough to make sense in my example.

            First of all, introduction:

            Source https://stackoverflow.com/questions/70376569


            Why is my Haskell function argument required to be of type Bool?
            Asked 2021-Nov-30 at 09:42

            I have a function in Haskell that is defined as follows:



            Answered 2021-Nov-30 at 09:42

            Haskell values have types. Each value has a type. One type. It can't be two different types at the same time.

            Thus, since x is returned as the result of if's consequent, the type of the whole if ... then ... else ... expression is the same as x's type.

            An if expression has a type. Thus both its consequent and alternative expression must have that same type, since either of them can be returned, depending on the value of the test. Thus both must have the same type.

            Since x is also used in the test, it must be Bool. Then so must be y.

            Source https://stackoverflow.com/questions/70053894


            Vector of functions in APL
            Asked 2021-Nov-30 at 09:31

            What is the syntax for a vector (array) of functions in APL?

            I have tried the following but these are interpreted as a 3-train and a 2-train, respectively:



            Answered 2021-Nov-28 at 23:26

            Dyalog APL does not officially support function arrays, you can awkwardly emulate them by creating an array of namespaces with identically named functions.

            Source https://stackoverflow.com/questions/70148229


            What's the theoretical loophole that allows F# (or any functional language) to apply a function mulitple times on the same input
            Asked 2021-Nov-17 at 06:29

            In F# if I write



            Answered 2021-Nov-17 at 01:24

            To expand on the answer given in the comments, the first p is an immutable value, while the second p is a function. If you refer to an immutable value multiple times, then (obviously) its value doesn't change over time. But if you invoke a function multiple times, it executes each time, even if the arguments are the same each time.

            Note that this is true even for pure functional languages, such as Haskell. If you want to avoid this execution cost, there's a specific technique called memoization that can be used to return cached results when the same inputs occur again. However, memoization has its own costs, and I'm not aware of any mainstream functional language that automatically memoizes all function calls.

            Source https://stackoverflow.com/questions/69997578


            Is Control.Monad.Reader.withReader actually Data.Functor.Contravariant.contramap?
            Asked 2021-Nov-03 at 06:39

            I'm working trough the book Haskell in depth and I noticed following code example:



            Answered 2021-Nov-03 at 06:39

            Reader's type parameters aren't in the right order for that to be contramap for it. A Contravariant functor always needs to be contravariant in its last type parameter, but Reader is contravariant in its first type parameter. But you can do this:

            Source https://stackoverflow.com/questions/69817514


            Confused about evaluation of lazy sequences
            Asked 2021-Oct-20 at 15:49

            I am experimenting with clojure's lazy sequences. In order to see when the evaluation of an item would occur, I created a function called square that prints the result before returning it. I then apply this function to a vector using map.



            Answered 2021-Oct-20 at 15:49

            Laziness isn't all-or-nothing, but some implementations of seq operate on 'chunks' of the input sequence (see here for an explanation). This is the case for vector which you can test for with chunked-seq?:

            Source https://stackoverflow.com/questions/69648554


            What is the relation between syntax sugar, laziness and list elements accessed by index in Haskell?
            Asked 2021-Aug-30 at 04:46

            Haskell lists are constructed by a sequence of calls to cons, after desugaring syntax:



            Answered 2021-Aug-30 at 04:46

            Lists in Haskell are special in syntax, but not fundamentally.

            Fundamentally, Haskell list is defined like this:

            Source https://stackoverflow.com/questions/68978811

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


            No vulnerabilities reported

            Install dry-transaction

            You can download it from GitHub.
            On a UNIX-like operating system, using your system’s package manager is easiest. However, the packaged Ruby version may not be the newest one. There is also an installer for Windows. Managers help you to switch between multiple Ruby versions on your system. Installers can be used to install a specific or multiple Ruby versions. Please refer ruby-lang.org for more information.


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