Questions tagged [f#]
F# is a succinct, expressive and efficient functional and object-oriented language for .NET which helps you write simple code to solve complex problems.
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Simple DiffSharp example
How to convert this simple PyTorch snippet to DiffSharp? It's supposed to be similar but many functions are not to be found.
# Define tensors with requires_grad=True to track computation history
x = ...
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How to create a new operator '=??' for field bindings in F#?
I think this is simple, but I can't get it.
I wish to create a new operator, e.g. (=??) , that can be used like '=' for property field bindings.
That is the new operator will be used like:
MyProperty =...
- 5,305
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How to print examples when asked for --help in F# argu
Using this SO answer I can print info for all CLI options.
How can I add an Examples section after --help is printed?
Extending Argu's tutorial I would like to print the below on --help:
USAGE: gadget....
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Why doesn't F# inline this inner function?
I have this active pattern:
[<return: Struct>]
let (|Integer|_|) self =
let rec loop acc (isNegative: bool) self =
match self with
| C(digit, tail) when (...
- 11
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Exception when converting an F# quotation to Lambda expression
This code is meant to execute a F# Query against an EF DbContext, using quotations to isolate the repeating
let db() = serviceProvider.CreateScope().ServiceProvider.GetRequiredService<IMyDbContext&...
- 2,720
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One at a time async in F#?
What is a good approach to wrapping an Async<'t> such that only one of them can run at a time?
I have come up with a solution using MailboxProcessor although I wonder if a more lightweight ...
- 36k
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How to iterate over ReadOnlySpan in F#?
You can get Spans via System.Memory to.NET Standard 2.0 compatible libraries.
But how do you do this the most efficiently in F#:
let myRsp = "test1".AsSpan()
let test = Seq.forall (fun x -&...
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F# and XSLT Return matches found
I am a Novice at F# and am trying to understand code from a colleague.
Below is a picture of the html Response. As you can see "lblMatchesFound" is 11.
How would I code this to return the ...
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Parsing numbers with a comma decimal separator with FParsec
Is it possible to use FParsec's built-in parsers for numbers (e.g. pfloat, numberLiteral) with different culture settings and parse numbers with a comma as a decimal separator? And if not, what would ...
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Error when using SQLProgrammabilityProvider when connecting to Azure?
in our project we have been using the SQLProgrammabilityProvider for quite a while now.
However when we try to build now when having our Azure SQL DB connection string in the code we get the following ...
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F# discriminated unions simple use raises AOT and trimming warnings on publish
F#, .NET 8 console app with DUs generates AOT & trimming warnings even for simple usage.
I am creating an F#, .NET 8 (SDK 8.0.302) console app and publish as a single file with AOT, trimming. I ...
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How can ConditionalWeakTable be used with multiple references?
ConditionalWeakTable represents a thread-safe way to attach references to other references and not have to worry about garbage collection of the attached references. However, it can only be used with ...
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How to make complex spa with fable feliz?
I am newbie in web dev, but I need fast dev medium level app.
On start i confused how to compose react components with router and other components with props. Master pager(layouts,menu), theme(dark|...
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How do I use `DateTimeOffset`s to show 23 or 25 hours on a day when clocks change?
New York switched from Eastern Standard Time to Eastern Daylight Time on March 10th, 2024.
I believe the time zone ID "Eastern Standard Time" maps to "America/New_York" in .NET.
...
- 1,763
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How to catch printing errors from background thread in Elmish/F#
I have a print function in F# that uses an STA thread:
let PrintProgressNoteAsync (encounterid:int) =
async {
let mutable printmsg = null
let ...
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