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FHASH QUESTIONS

This expression was expected to have type 'obj' but here has type 'string'
This expression was expected to have type 'obj' but here has type 'string'
Hope that helps According to the Fabulous Guide (https://fsprojects.github.io/Fabulous/views-perf.html) you need to box the list elements:
TAG : fhash
Date : November 17 2020, 07:01 PM , By : user5982015
How can I declare an object into another class on F#?
How can I declare an object into another class on F#?
To fix the issue you can do You are probably getting an error because module.Owe is not a correct way of referencing a type from another module. You do not need the module keyword here - you just need to give the module name and the class name as in
TAG : fhash
Date : October 16 2020, 06:10 AM , By : k1p0d
how to use list.filter when the function called has several parameters, in F#?
how to use list.filter when the function called has several parameters, in F#?
will be helpful for those in need You can use List.choose:
TAG : fhash
Date : October 14 2020, 01:00 PM , By : Иван Смирнов
Passing a F# struct to C#
Passing a F# struct to C#
With these it helps To create List out of any other enumerable (including F list) use the .ToList extension method from System.Linq.Enumerable:
TAG : fhash
Date : October 14 2020, 04:00 AM , By : Nhaste
Pattern matching with type annotations
Pattern matching with type annotations
I hope this helps you . Actually, even when you use type annotation in function parameters, you are using type annotation in patterns too. F pattern matching works even on function parameters (let binding in general).So, as usual, type annotation is
TAG : fhash
Date : October 14 2020, 12:00 AM , By : Jesse Elve
Why some common standards were redefined in F#?
Why some common standards were redefined in F#?
I wish this helpful for you I have started F a few days ago and I do not understand why some things which have been common for very long have been redefined?
TAG : fhash
Date : October 13 2020, 10:00 PM , By : Γιώργος Νικηφοράκης
F# Array.tryFindIndex start search from an index
F# Array.tryFindIndex start search from an index
around this issue The base libraries try to provide functions for your convenience but they cannot possibly anticipate all use cases. Nothing wrong with writing your own if need be:
TAG : fhash
Date : October 13 2020, 12:00 PM , By : r.stanley
Matching Patterns for list of tuples
Matching Patterns for list of tuples
will help you Your match expression has a final catch-all clause (the _ clause) that just calls getVar again with the same parameters. If the when (fst head) = exp condition fails, then code falls through to the catch-all clause, so getVar gets calle
TAG : fhash
Date : October 13 2020, 04:00 AM , By : GregG3000
Is it possible to require statically resolved type parameter to be a generic type?
Is it possible to require statically resolved type parameter to be a generic type?
around this issue You can try to do define the add function and then assign it to infix operator:
TAG : fhash
Date : October 10 2020, 04:00 PM , By : sachin kalgundi
How Reflection MakeUnion three level type?
How Reflection MakeUnion three level type?
hop of those help? The reason you're getting the exception is that when you call getAll in the recursive case for B1, the field type is C, and C has two cases, C1 | C2, so you get back an array of two elements. Then, that array is passed to the MakeU
TAG : fhash
Date : October 10 2020, 03:00 AM , By : h0ecake
How do i read the verbatim code parts of a markdown file using F#
How do i read the verbatim code parts of a markdown file using F#
I hope this helps . The best way to parse Markdown is to use a library designed to parse Markdown, such as FSharp.Formatting. It's really not a wheel you'll want to reinvent, especially if you're new to F. Usage example:
TAG : fhash
Date : October 07 2020, 09:00 PM , By : Lwin Myo Thu
Shadowing in version 4.5
Shadowing in version 4.5
I hope this helps you . You can't shadow values at the module level.You can shadow values inside some other scope like a function:
TAG : fhash
Date : October 07 2020, 05:00 PM , By : code_chris
Cannot Read Cookies in Http Response
Cannot Read Cookies in Http Response
help you fix your problem Once you have the cookieValue, it should be an HttpCookie instance. And HttpCookie has a Values property that "Gets a collection of key/value pairs that are contained within a single cookie object."I suspect that cookieValue
TAG : fhash
Date : October 06 2020, 09:00 AM , By : GSc
F# String to numeric parse. Incomplete pattern matches on this expression
F# String to numeric parse. Incomplete pattern matches on this expression
To fix this issue An incomplete pattern match error indicates that all the possibilities of the match expression (System.Int32.TryParse optionselect) are not accounted for. There are two big reasons in this particular case. There is no accounting for
TAG : fhash
Date : October 06 2020, 04:00 AM , By : Ankit Mishra
F# Async.Parallel |> Async.RunSynchronously only uses one of the eight CPU core?
F# Async.Parallel |> Async.RunSynchronously only uses one of the eight CPU core?
fixed the issue. Will look into that further You're synchronously enqueueing all of your Add operations before you start dequeuing any messages. This means that when the agent is choosing what to do next it will always Add a new item to the queue if
TAG : fhash
Date : October 05 2020, 05:00 PM , By : Peter Murray
Using f# to mimic linux touch command, need help implementing
Using f# to mimic linux touch command, need help implementing
To fix this issue Your code has several problems. I'll try to go through them one by one.First, the indentation of the code in your question is totally messed up. If this is a direct copy and paste from your code, the first thing we need to do is fix
TAG : fhash
Date : October 03 2020, 06:00 PM , By : Andros Andronikou
F# for textual representation of a polynomial
F# for textual representation of a polynomial
I hope this helps you . If you are doing this to learn F (or as a homework), then it is good idea to use recursion. You can start with the usual template for recursive processing of lists - where you iterate over coefficients, handle empty list and h
TAG : fhash
Date : October 03 2020, 12:00 AM , By : 魔法破坏者
How to switch from error track back to success track in railway-oriented program in F#?
How to switch from error track back to success track in railway-oriented program in F#?
To fix this issue Based on the answer from @Gus to this question (AsyncResult and handling rollback) it seems that bindError is what I needed. I created a similar to his bindError bindExn, and it seems to work as well, so now both error and exns can
TAG : fhash
Date : October 02 2020, 05:00 PM , By : Bhaumik K
F# type 'a -> ('a -> 'b) -> 'b
F# type 'a -> ('a -> 'b) -> 'b
Does that help If we write out what you've done as explicit signatures and functions you've done this.
TAG : fhash
Date : October 02 2020, 01:00 PM , By : pmichaudST
ref and byref<> parameters in F# class members
ref and byref<> parameters in F# class members
Hope that helps int ref is type definition of F Reference Cell, while byref
TAG : fhash
Date : October 02 2020, 04:00 AM , By : Leisure Time Vaping
F# Record Structural Comparison Ordering
F# Record Structural Comparison Ordering
I wish this help you Ah, straight after I posted the question I managed to find the answer:From the language spec: https://fsharp.org/specs/language-spec/4.1/FSharpSpec-4.1-latest.pdf
TAG : fhash
Date : October 02 2020, 01:00 AM , By : roelvdwal
“Decorate” several types with same static member function and attribute
“Decorate” several types with same static member function and attribute
To fix the issue you can do This seems like it may be overkill, but do you mean this sort of thing?
TAG : fhash
Date : September 30 2020, 07:00 AM , By : 박동완
Controlling access on fields in F# types
Controlling access on fields in F# types
Any of those help You cannot make individual record fields private or internal, but you can make all fields private or internal. This hides all the fields, so you have to expose those that you want to make accessible as members. You can also add stat
TAG : fhash
Date : September 29 2020, 01:00 PM , By : REDWolfSpb
In F#, can a match expression 'fall through' another match? like in C# or C++?
In F#, can a match expression 'fall through' another match? like in C# or C++?
This might help you F is an expression based language, therefore it doesn't have imperative features like goto. However, you can still express the same logic. First of all, you can combine 'cases':
TAG : fhash
Date : September 28 2020, 10:00 PM , By : Karen Qin
F# Union Case Parameterization
F# Union Case Parameterization
seems to work fine You can put multiple items into a tuple before pattern matching and match on them both at once. This gives you an "AND" pattern match:
TAG : fhash
Date : September 28 2020, 12:00 PM , By : mahmoud bakrey
Unexpected identifier in definition. Expected incomplete structured construct at or before this point or other token
Unexpected identifier in definition. Expected incomplete structured construct at or before this point or other token
it helps some times Many parts of your code are using C syntax, not F. This is what it should look like written in F:
TAG : fhash
Date : September 27 2020, 08:00 PM , By : Alabi Sefunmi
Is it possible to remove irrelevant restrictions from paket.lock?
Is it possible to remove irrelevant restrictions from paket.lock?
I think the issue was by ths following , These declarations in the paket.lock file aren't irrelevant. You're seeing this because the System.Memory package you're depending on, either directly or implicitly, has a lot of targets it can run on. Paket i
TAG : fhash
Date : September 26 2020, 07:00 PM , By : HIMANSHU JOSHI
Clear all event handlers in F#?
Clear all event handlers in F#?
it should still fix some issue As far as I can see, there is no way to do this with standard F Event which keeps track of event handlers using a ResizeArray and removes all handlers when asked to do that. All you need to do is to implement the IObser
TAG : fhash
Date : September 26 2020, 05:00 PM , By : nabamit
F# in nativescript?
F# in nativescript?
I hope this helps you . NativeScript apps are built using JavaScript, or by using any language that transpiles to JavaScript,so yes.
TAG : fhash
Date : September 25 2020, 10:00 PM , By : Diego
Why does F# not like the type ('a list list) as input?
Why does F# not like the type ('a list list) as input?
fixed the issue. Will look into that further The problem is somewhere in your implementation of the concat function. It is hard to say where exactly without seeing your code, but since this is an assignment, it is actually perhaps better to explain w
TAG : fhash
Date : September 25 2020, 08:00 AM , By : Thanh Hải
Convert Discriminated Union to primitive type via member function in F#
Convert Discriminated Union to primitive type via member function in F#
wish helps you I'm not sure I understand what are you trying to do. If you define a discriminated union, then the value can be either of the cases and when you want to use a value of your ModelData type, you'll need to pattern match on it in order to
TAG : fhash
Date : September 24 2020, 12:00 PM , By : Enwo
Incorrect indentation for a lambda function
Incorrect indentation for a lambda function
Any of those help I think you're just missing a single closing parenthesis. I just added one at the end to close your 2nd lambda expression and the compiler is happy:
TAG : fhash
Date : September 24 2020, 09:00 AM , By : Dobin Rutishauser
How to change x,y coordinates in a class
How to change x,y coordinates in a class
I wish this helpful for you Sorry to disappoint you, OliverVS, but this ain't gonna fly. I believe I can see your intentions, but this needs a complete rewrite rather than a fix. Let me try to give you some advice.First of all, why do you use classes
TAG : fhash
Date : September 24 2020, 03:00 AM , By : Stevie Howell
How to return "None" in Fsharp?
How to return "None" in Fsharp?
fixed the issue. Will look into that further It returns some "" because an empty list doesn't cause an exception. You need to match on an empty list and return None. I also am not sure the List.map aligns with the concat you're trying to do here, per
TAG : fhash
Date : September 22 2020, 12:00 PM , By : Yuvraaj Singh Rahal
How do I check the OS in the F# preprocessor?
How do I check the OS in the F# preprocessor?
should help you out There is no built-in pre-defined symbol to indicate what operating system you are compiling for. When you use .NET, you generally use the same compiled assembly on all operating systems, so this is not something that you can reaso
TAG : fhash
Date : September 15 2020, 03:00 AM , By : shilpa mamidipelli
Are any optimization passes available in Fable?
Are any optimization passes available in Fable?
I wish this helpful for you I would expect from Fable or any other transpiler to preserve the structure of the code. So you could optimize your F code to calculate radius^2 only once.
TAG : fhash
Date : September 14 2020, 03:00 PM , By : Raymond Li
Can an F# Type Provider be designed to generate an AST type and parser?
Can an F# Type Provider be designed to generate an AST type and parser?
I hope this helps . I built such a library 4 years ago, which you can peruse at https://github.com/aastevenson/FSharp.Text.Experimental.TransformThe documentation is fairly extensive and complete, including tutorials, examples, API reference, etc. If
TAG : fhash
Date : September 08 2020, 02:00 PM , By : Michael O'Sullivan
Extending records with additional fields
Extending records with additional fields
will help you I think this can be a good use case for the anonymous records recently introduced in F.
TAG : fhash
Date : September 04 2020, 10:00 AM , By : Mihai Dragan
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