fear | Ruby port of some Scala 's monads | Functional Programming library
kandi X-RAY | fear Summary
kandi X-RAY | fear Summary
This gem provides Option, Either, and Try monads implemented an idiomatic way. It is highly inspired by scala's implementation.
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Top functions reviewed by kandi - BETA
- Combines a new future with the + self + value + .
- Creates a new future with the result of the result of this future .
- Creates a new future with the result of this future .
- Instantiate a new future with the given value .
- Select the predicate with the given predicate
- Return a partial with this partial function .
- Creates a new result of this future .
- Returns a Hash representation of the Hash .
- Recursively retryable .
- Creates a new future with the new future .
fear Key Features
fear Examples and Code Snippets
Lines of Code : 106License : Permissive (MIT)
Copyx = Random.rand(10)
Fear.match(x) do |m|
m.case(0) { 'zero' }
m.case(1) { 'one' }
m.case(2) { 'two' }
m.else { 'many' }
end
Fear.match(x) do |m|
m.case(Integer, 0) { 'zero' }
m.case(Integer, 1) { 'one' }
m.case(Integer, 2) { 'two' }
dividend = Fear.try { Integer(params[:dividend]) }
divisor = Fear.try { Integer(params[:divisor]) }
problem = dividend.flat_map { |x| divisor.map { |y| x / y } }
case problem
in Fear::Success(result)
puts "Result of #{dividend.get} / #{divisor.get success = "Hello"
f = Fear.future { success + ' future!' }
f.on_success do |result|
puts result
end
f = Fear.future { 5 }
g = Fear.future { 3 }
f.flat_map do |x|
g.map { |y| x + y }
end
require 'open-uri'
pool = Concurrent::FixedThreadPool.new Community Discussions
Trending Discussions on fear
QUESTION
My question is about what should be the most OOP solution and the right design pattern for my situation. We have a user entity and multiple account entities belong to the user. Account entities can have multiple states and we can execute multiple operations on accounts. The outcome of these operations is based on the account entity's state.
I have the following code which is based mostly on switch (sometimes it looks like a few "if"). I would like to change it but cannot find the right design pattern.
...ANSWER
Answered 2022-Mar-13 at 20:41If I understood question correctly, then it is necessary to apply some action by its state.
If it is true, then we can use Factory pattern to get desired object which can execute some action. Mapping between state and action can be putted into HashTable.
So let's see an example of code. I will write via C#, but this code can be easily translated to Java because languages have many syntax similarities.
So we will have enum of statuses:
QUESTION
So I created a class: TWorkerThread = class(TThread). In the TWorkerThread Constructor I set FreeOnTerminate := True.
I then added a private Worker variable to my TForm. When I instantiate TWorkerThread for Worker, I always use CreateSuspended := False.
The only interactions I need to have with the thread once started is to cancel the process (Terminate) and check if the process is over (that check is user event based).
To check if the thread is still active I do:
...ANSWER
Answered 2022-Feb-04 at 12:25What's the correct way in Delphi to check if a non-Suspended created TThread with FreeOnTerminate = True is still executing?
There is none.
As soon as self destroying thread is started, you are no longer allowed to touch reference holding such thread from outside code, because that reference can become stale at any time.
Under some circumstances (if logic handling OnTerminate call in DoTerminate is not modified in your custom thread class) you can safely access thread reference from OnTerminate event handler. However, that will not help you solve your problem because you cannot wait on self destroying thread. On Windows such code causes exception that can be caught and handled, but on other platforms it causes undefined behavior and random deadlocks. But even on Windows writing such code is not advisable.
If you need to check status of a thread, cancel it or wait for it, you cannot use self destroying threads. Period. (For those that may object previous statement, yes under some circumstances some of those things are possible, but they commonly lead to shooting yourself in the foot).
You can use following workflow with TWorkerThread, providing that you leave FreeOnTerminate on False in your thread constructor and construct unsuspended thread. All following methods must be called from the main thread to avoid race condition on Worker reference. Having one extra thread that does nothing while your form is open will not cause you any trouble.
QUESTION
I read somewhere saying find() is not thread safe on STL map because when other thread is inserting to the map, the map itself is re-balancing, so find() may not return the proper iterator even the entry is indeed in the map. My observation tends to echo this. How about hash map (unordered_map)? I fear it may have the same issue, but not clear why.
So what is the proper way to call find() in a multithreaded context or is there any replacement?
example can be:
...ANSWER
Answered 2022-Jan-25 at 22:31None of the standard library containers are threadsafe. If you want to do this kind of thing, you must protect all accesses (both read and write) by a mutex.
QUESTION
The fine tuning endpoint for OpenAI's API seems to be fairly new, and I can't find many examples of fine tuning datasets online.
I'm in charge of a voicebot, and I'm testing out the performance of GPT-3 for general open-conversation questions. I'd like to train the model on the "fixed" intent-response pairs we're currently using: this would probably end up performing better in terms of company voice and style.
I have ready a long JSON file of data extracted from our current conversational engine, which matches user input to intents and returns the specified response. I'd like to train a GPT-3 model on this data.
As of now, for some quick testing, I've set up my calls to the API just like they suggest. I have a "fixed" intro text in the form
...ANSWER
Answered 2022-Jan-14 at 12:37I contacted OpenAI's support and they were extremely helpful: I'll leave their answer here.
the prompt does not need the fixed intro every time. Instead, you'll just want to provide at least a few hundred prompt-completion pairs of user/bot exchanges. We have a sample of a chatbot fine-tuning dataset here.
QUESTION
This is my first stack overflow question, so if I am presenting something wrong, please let me know. I am pretty new to computer programming, so I just have a small webpage where I am just implementing things that I am learning.
I made a little quiz with random trivia multiple choice questions you can take if you press a button. I am using window prompts to ask the questions and get the answers, and I have all of the questions and answers stored as objects with question/prompt and answer pairs. All of those objects are stored in an array in a variable called shortQuizPrompts. I already have the quiz working and everything, aka., It tells you after every question if you got the answer to that question right or wrong, and it gives you a grade afterwards... I also have it set up so that if you enter an answer that is not "a", "b", "c", or "d", it lets you know that it isnt a valid answer. Those sorts of things.
As of right now, you can choose how many questions long you want the quiz to be out of the 24 total questions I have so far. It just asks the questions in the order that they are stored in the array. For example, you will never be asked the last question in the array if you do not choose for the quiz to be the full 24 questions long. However, I want to make the quiz ask the questions in a random order, while also removing those questions from the array as to not ask the same question multiple times.
I have tried increasing the iterator while looping through the array to a random number from 0 to the length of however many questions they chose. Then checking to see if the iterator was larger than the length of the number of questions they chose, it would decrease the iterator until it found a question that is still in the array that it could ask...
If anyone knows how to go about doing that, it would be great. Sorry for the long question btw. I am pretty new to coding, so this is probably a simple answer, but I digress. I'm pretty sure I did everything right. Thx.
...ANSWER
Answered 2022-Jan-12 at 01:03You can shuffle the shortQuizPrompts array before starting the quiz. Array shuffle details can be found in this answer.
QUESTION
I'm currently evaluating Generics.SOP for a use case involving derivation of new, related data types from a given data type definition.
I want to start out by defining a "de Bruijinized" version of a data type representing lambda terms:
...ANSWER
Answered 2021-Dec-21 at 12:21I have no idea whether what you're doing is a good idea ...
But all that aside, here is something that works for at least your simple use case.
QUESTION
I am currently trying to crawl headlines of the news articles from https://7news.com.au/news/coronavirus-sa.
After I found all headlines are under h2 classes, I wrote following code:
...ANSWER
Answered 2021-Dec-20 at 08:56Your selection is just too general, cause it is selecting all
.decompose() to fix the issue.
How to fix?
Select the headlines mor specific:
QUESTION
I have tried speeding up a toy GEMM implementation. I deal with blocks of 32x32 doubles for which I need an optimized MM kernel. I have access to AVX2 and FMA.
I have two codes (in ASM, I apologies for the crudeness of the formatting) defined below, one is making use of AVX2 features, the other uses FMA.
Without going into micro benchmarks, I would like to try to develop an understanding (theoretical) of why the AVX2 implementation is 1.11x faster than the FMA version. And possibly how to improve both versions.
The codes below are for a 3000x3000 MM of doubles and the kernels are implemented using the classical, naive MM with an interchanged deepest loop. I'm using a Ryzen 3700x/Zen 2 as development CPU.
I have not tried unrolling aggressively, in fear that the CPU might run out of physical registers.
AVX2 32x32 MM kernel:
...ANSWER
Answered 2021-Dec-13 at 21:36Zen2 has 3 cycle latency for vaddpd, 5 cycle latency for vfma...pd. (https://uops.info/).
Your code with 8 accumulators has enough ILP that you'd expect close to two FMA per clock, about 8 per 5 clocks (if there aren't other bottlenecks) which is a bit less than the 10/5 theoretical max.
vaddpd and vmulpd actually run on different ports on Zen2 (unlike Intel), port FP2/3 and FP0/1 respectively, so it can in theory sustain 2/clock vaddpd and vmulpd. Since the latency of the loop-carried dependency is shorter, 8 accumulators are enough to hide the vaddpd latency if scheduling doesn't let one dep chain get behind. (But at least multiplies aren't stealing cycles from it.)
Zen2's front-end is 5 instructions wide (or 6 uops if there are any multi-uop instructions), and it can decode memory-source instructions as a single uop. So it might well be doing 2/clock each multiply and add with the non-FMA version.
If you can unroll by 10 or 12, that might hide enough FMA latency and make it equal to the non-FMA version, but with less power consumption and more SMT-friendly to code running on the other logical core. (10 = 5 x 2 would be just barely enough, which means any scheduling imperfections lose progress on a dep chain which is on the critical path. See Why does mulss take only 3 cycles on Haswell, different from Agner's instruction tables? (Unrolling FP loops with multiple accumulators) for some testing on Intel.)
(By comparison, Intel Skylake runs vaddpd/vmulpd on the same ports with the same latency as vfma...pd, all with 4c latency, 0.5c throughput.)
I didn't look at your code super carefully, but 10 YMM vectors might be a tradeoff between touching two pairs of cache lines vs. touching 5 total lines, which might be worse if a spatial prefetcher tries to complete an aligned pair. Or might be fine. 12 YMM vectors would be three pairs, which should be fine.
Depending on matrix size, out-of-order exec may be able to overlap inner loop dep chains between separate iterations of the outer loop, especially if the loop exit condition can execute sooner and resolve the mispredict (if there is one) while FP work is still in flight. That's an advantage to having fewer total uops for the same work, favouring FMA.
QUESTION
EDIT: Benchmarks for different techniques published at the bottom of this question.
I have a very large List full of integers. I want to remove every occurrence of "3" from the List. Which technique would be most efficient to do this? I would normally use the .Remove(3) extension until it returns false, but I fear that each call to .Remove(3) internally loops through the entire List unnecessarily.
EDIT: It was recommended in the comments to try
TheList = TheList.Where(x => x != 3).ToList();
but I need to remove the elements without instantiating a new List.
...ANSWER
Answered 2021-Nov-21 at 17:55You can just use List.RemoveAll and pass your predicate - https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.list-1.removeall?view=net-6.0#System_Collections_Generic_List_1_RemoveAll_System_Predicate__0__ . This guaranteed to be linear complexity O(list.Count)
QUESTION
I am working with a dataset where I am separating the contents of one Excel column into 3 separate columns. A mock version of the data is as follows:
Movie Titles/Category/Rating Wolf of Wall Street A-13 x 9 Django Unchained IMDB x 8 The EXPL Haunted House FEAR x 7 Silver Lining DC-23 x 8This is what I want the results to look like:
Title Category Rating Wolf of Wall Street A-13 9 Django Unchained IMDB 8 The EXPL Haunted House FEAR 7 Silver Lining DC-23 8Here is the RegEx I used to successfully separate the cells: For Rating, this RegEx worked:
...ANSWER
Answered 2021-Nov-17 at 15:16Assuming there is always x between Category and Rating, and the Category has no spaces in it, then the following should get what you want:
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