f#

问题 I have an 3D byte[,,] array(i, x, y), inside it it has i = B/G/R and x = x coordinates and y = y coordinates . eg. i = 2 x = 100 y = 200, red component of pixel(100,200) or i = 0 x = 100 y = 200, blue component of pixel(100,200) Yes I know RGB is in reverse order. Now, I'm not sure how to turn this byte[,,] into an image. I've looked at http://msdn.microsoft.com/en-us/library/system.drawing.bitmap.aspx. If I use SetPixel(), will it be really slow? How can I avoid using SetPixel()? I'm trying

问题 I have a few server-side objects with inheritrence hierarchy, like this: [<JavaScriptExport>] type [<AbstractClass>] A() = ... [<JavaScriptExport>] type [<AbstractClass>] B() = inherit A() [<JavaScriptExport>] type C() = inherit B() The above objects have certain fields and methods, which I have omitted for brevity. All of those can be compiled to javascript -- I receive no build errors. I have an RPC that would return a server-side created instance of such an object: module Remoting = [<Rpc>

问题 The code below is part of a bigger ML project, but I want it to run while it's minimised too. How can I do this? I think I need to run it as a windows process to achieve this, but there isn't much information on how to do that in F#. Or is there another way? let rec f() = let c = System.Console.ReadKey().KeyChar printfn "%c" c f() f() 回答1: From the link in Aaron's comment I decided to give the port a try. This works for me. Note that this could definitely be cleaned up a bit more. I placed

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

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

问题 Good morning at all, first I present myself: my name is Mattia and I'm a student in Computer Science. I've a problem with three function that I've already implement in two other programming language (C# and Python), using imperative loop like for and while, but what I've to do is to convert them in the recursive style. The function in C# are: resetList: given two list, the method initialize the counters inside the object of first list, and put the new object in the second list. public static

问题 My objective is to find the total amount of sun for the following years - 1960,1970,1980,1990,2000,2010. The data comes from a txt file and year, month, maxt, mint, afday, rain and sun have already been defined and take the relevant element from the tuple, then it ignores the rest. // Example let sun (_,_,_,_,_,_,t) = t I have found the total amount of sun for the year 1960. However, I am not sure how to find the remaining years. let Q6 = ds |> List.filter (fun s-> year(s)=1960) |> List.sumBy

问题 Context: Microsoft Visual Studio 2015 Community; F# I've been learning F# for about 1/2 a day. I do have a vague idea of how to do functional programming from a year spent fiddling with mLite. The following script traverses a folder tree and pulls in log files. The files have entries delimited by ~ and there may be one or more there. open System open System.IO let files = System.IO.Directory.GetFiles("C:\\scratch\\snapshots\\", "*.log", SearchOption.AllDirectories) let readFile (file: string)

问题 I'm trying to use F#'s List.map function to call a function I've written on every string in the array. Here is the function I've written (*Takes a string and filters it down to common text characters*) let filterWord wordToFilter = Regex.Replace(wordToFilter, "[^a-zA-Z0-9/!\'?.-]", ""); and here is my main method where I call it (*Main method of the program*) [<EntryPoint>] let main argsv = let input = File.ReadAllText("Alice in Wonderland.txt"); //Reads all the text into a single string let

问题 I'm writing on a WebSharper sitelet that uses the JQueryUI extension. The HTML generated by the WebSharper sitelet looks like this: <html> <head> ... <script src="//code.jquery.com/ui/1.11.1/jquery-ui.js" ...></script> I'm frequently without internet while developing, so I'd really like to serve jquery-ui.js off the development server instead. That is, I'd much rather have this: <html> <head> ... <script src="/Scripts/jquery-ui.js" ...></script> The docs say this should be possible by setting