rts | Generates Go structs from JSON server responses | JSON Processing library
kandi X-RAY | rts Summary
kandi X-RAY | rts Summary
Generate Go structs definitions from JSON server responses. RTS defines type names using the specified lines in the route file and skipping numbers. e.g: a request to a route like /users/1/posts generates type UsersPosts. It supports parameters: a line like /users/:user/posts/:pid 1 200 generates type UsersUserPostsPid from the response to the request GET /users/1/posts/200. RTS supports headers personalization as well, thus it can be used to generate types from responses protected by some authorization method. Updated: 6/17/2016 by Krish Verma In case the JSON server is HTTPS with unknown certificate signing authority, pass the -insecure flag to disable TLS certificate check.
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QUESTION
I have recovered an old 6502 emulator I did years ago to implement some new features. During testing I discovered something wrong, surely due to an error in my implementation.
I have to loop through a 16 bit subtraction until the result is negative: quite simple, no? Here is an example:
ANSWER
Answered 2021-May-25 at 12:22loop through a 16 bit subtraction until the result is negative
"Branch" to Label if result is >0,
Do you see that these descriptions contradict each other?
The 1st one continues on 0, the 2nd one stops on 0.
Only you can decide which one is correct!
From a comment:
Do ... Loop While GE 0This code is part of a Bin to Ascii conversion, made by power of ten subtraction. The bin value could be >$8000, so it is 'negative' but this does not matter. In the first iteration I sub 10000 each cycle until the result is 'below 0', then I restore the previous value and continue with the remainder. The problem is how to detect the 'below 0' condition as said in the post
Next example subtracts 10000 ($2710) from the unsigned word stored at zero page address $90. The low byte is at $90, the high byte is at $91 (little endian).
QUESTION
I have a microservice written in Haskell, the compiler is 8.8.3.
I built it with --profile option and ran it with +RTS -p. It is running about 30 minutes, there is .prof file but it is empty (literally 0 bytes). Previously I did it on my local machine and I stop the service with CTRL-C and after the exit it produced .prof file which was not empty.
So, I have 2 questions:
- How to collect profiling information when a Haskell microservice runs under Kubernetes in the most correct way (to be able to read this .prof file)?
- How to pass run time parameter to Haskell run-time where to save this .prof file (maybe some workaround if no such an option), for 8.8.3 - because I have feeling that the file may be big and I can hit disk space problem. Also I don't know how to flush/read/get this file while microservice is running. I suppose if I will be able to pass full path for this .prof file then I can save it somewhere else on some permanent volume, to "kill" the service with
INTsignal for example, and to get this .prof file from the volume.
What is the usual/convenient way to get this .prof file when the service runs in Kubernetes?
PS. I saw some relevant options in the documentation for newest versions, but I am with 8.8.3
...ANSWER
Answered 2021-Jun-09 at 16:24I think the only way to do live profiling with GHC is to use the eventlog. You can insert Debug.Trace.traceEvent into your code at the functions that you want to measure and then compile with -eventlog and run with +RTS -l -ol -RTS. You can use ghc-events-analyze to analyze and visualize the produced eventlog.
The official eventlog documentation for GHC 8.8.3 is here.
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 install this graphing library, but cabal-install is giving me this list of errors (only showing the bottom of the list, since everything above is very long and similar):
...ANSWER
Answered 2021-May-23 at 13:30Instead of editing the DEB_BUILD_HARDENING_PIE environment variable, I have found another way to have cabal-install not make a PIE, which seems to fix this issue.
cabal --ghc-option="-optl-no-pie" install chart-diagrams
QUESTION
I am reading the data from a "Torque Wrench" using "USB Host Shield2.0" and Arduino UNO. I am receiving correct data from my "Torque Wrench" Data is receiving in a array.
But when I started reading data after "for" loop inside Void loop() I am receiving incorrect data. I attached Both output pictures correct and incorrect data.
Basically I am read data from Torque Wrench and send to receiver using Nrf24l01. I am receiving incorrect data.
My question is :- Why I am reading Incorrect data outside "for" loop.
- Correct Data inside "for" loop :- enter image description here
- Incorrect Data outside "for" loop :- enter image description here
ANSWER
Answered 2021-May-19 at 06:58Character arrays must be null-terminated to count as C strings.
After the for loop, add text[rcvd] = '\0';
Also, your rcvd is fixed at 64. It needs to be one less than the array size for the null terminator to fit.
QUESTION
I learn now KickAss assembler for C64, but i'm never learnd any asm or 8 bit computing before. I want to print big ascii banner (numbers). I want to store the "$0400" address in the memory and when i'm increased the line number i need to increase it by 36 (because the sceen is 40 char width so i want to jump ti next line), but my problem is this is a 2 byte number so i can't just add to it. This demo is works "fine" except the line increasing because i dont know that.
So what i'm need:
- How can i store a 2 byte memory address in a memory?
- How can i increase the memory address and store back (2 byte)?
- How can i store a value to the new address (2 byte and index registers is just one)?
Thx a lot guys!
...ANSWER
Answered 2021-Apr-11 at 16:28clc
lda LowByte ; Load the lower byte
adc #LowValue ; Add the desired value
sta LowByte ; Write back the lowbyte
lda HiByte ; No load hi byte
adc #HiValue ; Add the value.
sta HiByte
QUESTION
I have a javascript function that identifies all checked boxes and creates a variable to be used in the return statement of the filter, with the goal of showing only those rows whose corresponding checkbox is checked. If I type out the return function (commented out in the below code), I get the desired result. However, the variable 'filter_list' whose contents are the same as the typed out return statement, does not work.
Either I am missing something, or what I am trying to do can't be done. Looking for a fix to my code or a better way to filter based on the selections made.
...ANSWER
Answered 2021-May-04 at 17:03The problem is coming from:
QUESTION
In an effort to become better with Haskell, I'm rewriting a small CLI that I developed originally in Python. The CLI mostly makes GET requests to an API and allows for filtering/formatting the JSON result.
I'm finding my Haskell version to be a lot slower than my Python one.
To help narrow down the problem, I excluded all parts of my Haskell code except the fetching of data - essentially, it's this:
...ANSWER
Answered 2021-May-02 at 00:04It seemed odd that the performance of a common Haskell library was so slow for me, but somehow this approach solved my concerns:
I found that the performance of my executable was faster when I used stack install to copy the binaries:
QUESTION
I compiled gammu-1.42 on Ubuntu and I can succesfully send SMS's using the command:
...ANSWER
Answered 2021-Apr-29 at 13:34I solved this problem, the issue was not gammu-ssmd related but postgresql related.
The timezone was wrong in the postgresql.conf, it was different by the server's timezone.
If I runned "SELECT NOW();" in a postgres client on a distant computer the time was wrong but if I runned "SELECT NOW();" on the server than the time was fine. I'm not sure why this happened, I was hoping posgres NOW() will always give the same timezone.
Anyway, this resulted in weird behaviour from gammu-ssmd as wrong dates were inserted in the columns SendingDateTime, SendingTimeOut... from outbox table of gammu.
So I corrected the timezone, restarted postgresql and now everything is fine.
QUESTION
I have a requirement to get monthly total hours worked on different tasks for each employee. For that purpose I am writing a stored procedure. But left join is not populating all record from employee table. I know somehow the where condition is filtering out the null values but I really don't know how to overcome this problem.
...ANSWER
Answered 2021-Apr-27 at 11:37Once you use left join in a from clause, you normally continue with left join. This is critical if the second table is used for any conditions.
Then, any filtering conditions on any of the left join'ed tables need to be in the on clauses, not the where clause. So:
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