f#-interactive

问题 With the latest VS for mac installed (8.5 preview) and the latest net core sdk (3.1.200) F# 4.7 should be supported. When I run the dotnet fsi, indeed language features are supported and the FSI shows F# 4.7 as the F# version. In VS for mac, in the preferences settings the exact command: /usr/local/share/dotnet/dotnet fsi is the path to the F# compiler. However, when creating a new fix file and trying F# language features, it doesn’t work and the FSI in VS for mac doesn’t compile the code.

问题 With the latest VS for mac installed (8.5 preview) and the latest net core sdk (3.1.200) F# 4.7 should be supported. When I run the dotnet fsi, indeed language features are supported and the FSI shows F# 4.7 as the F# version. In VS for mac, in the preferences settings the exact command: /usr/local/share/dotnet/dotnet fsi is the path to the F# compiler. However, when creating a new fix file and trying F# language features, it doesn’t work and the FSI in VS for mac doesn’t compile the code.

问题 Hello I try to connect F# and MySQL database, but i got fallowing error :error FS0039: The namespace or module 'MySql' is not defined. So far,i tried to reference the folder which contains MySQL.Data.dll:project -> add reference->browse -> C:\Program Files (x86)\MySQL\MySQL Connector Net 6.3.6\Assemblies\v2.0 Also i tired to reference MySQL.Data,too. But each time,i get this error. Thanks for your help. Regards, 回答1: The F# interactive window is unaware of your project references, so you need

问题 And more specifically, in FSI ? 回答1: You can programatically control the clipboard using the Clipboard class in the System.Windows.Forms namespace. (The required assembly is brought in by default to FSI.) open System.Windows.Forms Clipboard.SetText("Hello from FSI!") 来源： https://stackoverflow.com/questions/1791747/how-to-copy-to-the-clipboard-in-f

问题 I have created my own type in F# called Accounts and I have then created objects for each account. type Account() = let AccountNumber = "" let mutable Balance:float = 0.0 Every account has two fields, AccountNumber (string) and Balance (float). I have then created an object for every account that holds the AccountName and the Balance. let acc1 = new Account() acc1.Insert("John",10.0) let acc2 = new Account() acc2.Insert("Mike",50.0) How do I create a list that holds each account (object)? I

问题 I am trying to use DotCover in FAKE , but it is throwing some error , as I am new to FAKE as well as F# , it's becoming difficult for me to understand the root cause of the problem . Here is the code : #r "D:/FAKEProject/Fake/packages/FAKE/tools/FakeLib.dll" open Fake open Fake.DotCover let testDir = "D:/FAKEProject/Fake/test/" let filters = "" Target "Clean" (fun _ -> CleanDirs [testDir] ) Target "TestCoverage" (fun _ -> !! ("D:/FAKEProject/Fake/UnitTest/UnitTest.dll") |> DotCoverNUnit (fun

问题 Is there a way within FSI that I can reference and use registered COM components? In a normal .fs compiled program I can simply reference the component in question and then open the relevant generated namespace(s). In a .fsx file, however, I can't seem to replicate this behaviour. I have tried using #r to reference the .dll directly, and I have tried using #I to point to the directory followed #r both with the library's "friendly" name and the file name, but nothing seems to work. Are you

问题 In Visual Studio 2015 and 2017, I'm trying out the Http class from several F# examples in FSharp Interactive, and I keep getting: error FS0039: The namespace or module 'Http' is not defined Here's the sample: open FSharp.Data let response = Http.RequestString("http://api.themoviedb.org/3/search/movie", silentHttpErrors = true) This is clearly due to the version of FSharp.Data. Is there a way to specify the correct version for FSharp Interactive? What version of FSharp.Data contains the Http

问题 By referencing the default WPF DLLs, it's pretty easy to do anything you could do using code-only WPF: #r "PresentationCore.dll" #r "PresentationFramework.dll" // ...other DLLs... #r "WindowsBase.dll" let window = System.Windows.Window() let panel = System.Windows.Controls.StackPanel() let button = System.Windows.Controls.Button() panel.Children.Add button button.Content <- "hi" window.Content <- panel window.Show() ... and you can manipulate it while the window is still open... button.Click

问题 Upon covering the predefined datatypes in f# (i.e lists) and how to sum elements of a list or a sequence, I'm trying to learn how I can work with user defined datatypes. Say I create a data type, call it list1: type list1 = A | B of int * list1 Where: A stands for an empty list B builds a new list by adding an int in front of another list so 1,2,3,4, will be represented with the list1 value: B(1, B(2, B(3, B(4, A)))) From the wikibook I learned that with a list I can sum the elements by doing