How to debug Fable using Visual Studio (not Code)
How to debug Fable using Visual Studio (not Code)
f#
Is there a standard option workflow in F#?
There’s no standard computation builder for options, but if you don’t need things like laziness (as added in the examples you linked) the code is straightforward enough that there’s no reason not to trust it (particularly given the suggestively named Option.bind function from the standard library). Here’s a fairly minimal example: type OptionBuilder() = member … Read more
F#, char seq -> strings
I was just researching this myself. I found that System.String.Concat works pretty well, e.g. “abcdef01234567” |> Seq.take 5 |> String.Concat;; assuming that you’ve opened System.
F# break from while loop
The short answer is no. You would generally use some higher-order function to express the same functionality. There is a number of functions that let you do this, corresponding to different patterns (so if you describe what exactly you need, someone might give you a better answer). For example, tryFind function returns the first value … Read more
Is F# really better than C# for math?
I think most of the important points were already mentioned by someone else: F# lets you solve problems in a way mathematicians think about them Thanks to higher-order functions, you can use simpler concepts to solve difficult problems Everything is immutable by default, which makes the program easier to understand (and also easier to parallelize) … Read more
Null Coalescing Operator in F#?
Yes, using some minor hackery found in this SO answer “Overload operator in F#”. At compiled time the correct overload for an usage of either (‘a Nullable, ‘a) ->’a or (‘a when ‘a:null, ‘a) -> ‘a for a single operator can be inlined. Even (‘a option, ‘a) -> ‘a can be thrown in for more … Read more
recursive descent parser and functional programming
Answer derived from this blog article: So my question is what would a more traditional functional approach to parsing (i.e. few side effects) look like? Sounds like you need to separate functional (as in Lisp, Scheme, Standard ML, CAML, OCaml, F#) from purity (absence of side effects, as in Haskell) and incidental language features (algebraic … Read more
F# interactive:how to display/change current working directory
> open System;; > Environment.CurrentDirectory;; val it : string = “C:\\” > Environment.CurrentDirectory <- @”c:\temp”;; val it : unit = () > Environment.CurrentDirectory;; val it : string = “c:\\temp”
Namespace aliasing in F#?
F# does not support aliasing of namespaces – only modules and types. So, to resolve the conflicts between .NET assemblies, you will, unfortunatelly, need to define aliases for all the types you’re using. This may be slightly easier thanks to the fact that F# type aliases are viewed as normal type declarations (by the F# … Read more
Should F# functions be placed in modules, classes, or another structure? [closed]
To give some specific recommendations about choosing between namespaces, modules abd classes in F#: If you’re writing functions using let that are expected to be used from F#, then putting them inside a module is the best choice. This gives you API similar to List.map and other basic F# functions. Regarding naming, you should use … Read more