storable | Marshal Ruby classes into and out of multiple formats | YAML Processing library
kandi X-RAY | storable Summary
kandi X-RAY | storable Summary
Marshal Ruby classes into and out of multiple formats (yaml, json, csv, tsv)
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of storable
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Trending Discussions on storable
QUESTION
In [alg.unique], the signature of ranges::unique_copy is defined as:
ANSWER
Answered 2021-May-26 at 13:10This is a bug in both implementations. Both contain the equivalent of
QUESTION
I would like to share data (in the simplest case an array of integers) between C and Haskell using Haskell's FFI functionality. The C side creates the data (allocating memory accordingly), but never modifies it until it is freed, so I thought the following method would be "safe":
- After the data is created, the C function passes the length of the array and a pointer to its start.
- On the Haskell side, we create a
ForeignPtr, setting up a finalizer which calls a C function that frees the pointer. - We build a
Vectorusing that foreign pointer which can be (immutably) used in Haskell code.
However, using this approach causes rather non-deterministic crashes. Small examples tend to work, but "once the GC kicks in", I start to get various errors from segmentation faults to "barf"s at this or this line in the "evacuation" part of GHC's GC.
What am I doing wrong here? What would be the "right way" of doing something like this?
An ExampleI have a C header with the following declarations:
...ANSWER
Answered 2021-May-25 at 06:24Copied and extended from my earlier comment.
You may have a faulty cast or poke. One thing I make a point of doing, both as a defensive guideline and when debugging, is this:
Explicitly annotate the type of everything that can undermine types. That way, you always know what you’re getting. Even if a poke, castPtr, or unsafeCoerce has my intended type now, that may not be stable under code motion. And even if this doesn’t identify the issue, it can at least help think through it.
For example, I was once writing a null terminator into a byte buffer…which corrupted adjacent memory by writing beyond the end, because I was using '\NUL', which is not a char, but a Char—32 bits! The reason was that pokeByteOff is polymorphic: it has type (Storable a) => Ptr b -> Int -> a -> IO (), not … => Ptr a -> ….
This turned out to be the case in your code! Quoth @aclow:
The
createVectorgenerated by c2hs was equivalent to something likealloca $ \ ptr -> createCVector'_ ptr >> peek ptr, wherecreateCVector'_ :: Ptr () -> IO (), which meant thatallocaallocated only enough space to hold a unit. Changing the in-marshaller toalloca' f = alloca $ f . (castPtr :: Ptr ForeignVector -> Ptr ())seems to solve the issue.
Things that turned out not to be the case, but could’ve been:
I’ve encountered a similar crash when a closure was getting corrupted by somebody (read: me) writing beyond an array. If you’re doing any writes without bounds checking, it may be helpful to replace them with checked versions to see if you can get an exception rather than heap corruption. In a way this is what was happening here, except that the write was to the alloca-allocated region, not the array.
Alternatively, consider lifetime issues: whether the ForeignPtr could be getting dropped & freeing the buffer earlier than you expect, giving you a use-after-free. In a particularly frustrating case, I’ve had to use touchForeignPtr to keep a ForeignPtr alive for that reason.
QUESTION
I'm trying to parse a huge 3d-data array of complex values from binary. Later this should become l matrices (n x m). Since I'm going to work on these matrices, I'm limited to matrix libraries - hmatrix seems to be promising.
The data layout is not in my requried format, so I have to jump around in positions (i,j,k) -> (k,i,j), where i and j are elements of n and m and k element of l.
I think the only way to read in this in is my using mutables, otherwise I'll end up with several Terrabytes of garbage. My idea was to use boxed mutual arrays or vectors of mututal matrices (STMatrix from Numeric.LinearAlgebra.Devel), so I end up with something like:
...ANSWER
Answered 2021-Apr-28 at 21:49As I understand it, you have a "huge" set of data in i-major, j-middling, k-minor order, and you want to load it into matrices indexed by k whose elements have i-indexed rows and j-indexed columns, right? So, you want a function something like:
QUESTION
I'm looking at some of the source codes from JuicyPixels, and the mutable vector is confusing me. In the function generateMutableImage at line 808 which is
ANSWER
Answered 2021-Feb-24 at 11:53The snippet
QUESTION
Having read the following question: How to save message from telegram channel as variable
I need to do the same but from a NewMessage event, storing the content of the message in a variable.
However, neither event.text nor event.raw_test seem to be storable in a variable
The following code:
...ANSWER
Answered 2021-Feb-23 at 15:46from telethon import TelegramClient, events
import logging
logging.basicConfig(format='[%(levelname) 5s/%(asctime)s] %(name)s: %(message)s',
level=logging.WARNING)
client = TelegramClient('session', 'api_id', 'api_hash')
client.start()
channel = 'xxx'
@client.on(events.NewMessage(chats=channel))
async def handler(event):
print(event.message.message)
client.run_until_disconnected()
QUESTION
I'm currently working on an App to manage Assignments, as I'm using different Types of Assignments like a To Do or a Homework, ... . So I made a Protocol for all key variables every Assignment should have, so that I can later display all different Types(conforming to Assignment) in one "All" List.
When testing in a Playground I managed to build a View which takes all Types conforming to Assignment and display title and description. But when starting in my main project I encountered these problems. Project Structure
a class Assignments holds all my data. Currently I have two lists with two types conforming to Assignment, HomeWork and OnlineLesson. This is just a transition and not good practise still...
a func getAll later should return both of those lists.
...ANSWER
Answered 2021-Feb-03 at 10:39Thanks for the Help, I got everything working by replacing the protocol Assignment, with an class Assignment:
QUESTION
I have a Blazor Server Project based on ASP.NET Core 5. I want to host my own openid-configuration discovery file. Since this file is served while running the OIDC workflow I want to verify what is the correct way to host this file. So far I have tried the following and only option 2 works.
- using wwwroot/.well-known
This involves hosting the openid-configuration file statically in the wwwroot folder of my blazor server project.
After this if I run he project and try to access the file using localhost:44382/.well-known/openid-configuration, the file is not served.
- Using Controllers
For this I just added a simple controller to my blazor project and specified .well-known/openid-configuration as a route for my anonymous controller HTTPGET action.
...ANSWER
Answered 2021-Jan-13 at 07:22The reason why your first method is not working is that you don't serve a static file in a way the static file extensions assume you do. You missing a file ending, otherwise, the request isn't recognized as a file.
That said, you can write your own middleware. Give the file a proper ending like .json. If the resources /.well-known/openid-configuration/ is requested, you change the requested path to /.well-known/openid-configuration.json and let the static file extension handle the rest.
QUESTION
I installing perl-5.28.1 via perlbrew. Some tests fail:
ANSWER
Answered 2020-Dec-19 at 14:40To run a single one of perl's test file, you can use
QUESTION
I'm having trouble applying at once different transformers to columns with different types (text vs numerical), and concatenating such transformers in a single one for later use.
I tried to follow the steps in the documentation for Column Transformer with Mixed Types, which explains how to do that for a mix of categorical and numerical data, but it doesn't seem to work with text data.
TL;DRHow do you create a storable transformer that follows different pipelines for text and numerical data?
Data download and preparation ...ANSWER
Answered 2020-Dec-16 at 16:49Short answer:
QUESTION
Often I want to create a GraphQL type that represents the results of a Cypher query that spans than one node. I can't return a concrete node from @cypher in this case, as no such node exists. I tried to return appropriately named fields from a top-level @cypher query but this approach did not work.
ANSWER
Answered 2020-Oct-31 at 10:37The problem is that according to the Person definition, there must be an object at the query output. So try this query
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Install storable
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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