paramarray

问题 How do I implement a method with a variable number of arguments? In C#, we can use the params keyword: public class MyClass { public static void UseParams(params int[] list) { for (int i = 0; i < list.Length; i++) { Console.Write(list[i] + " "); } Console.WriteLine(); } } So how can I do this in F#? type MyClass() = member this.SomeMethod(params (args:string array)) = () I receive the following error from the code above: The pattern discriminator 'params' is not defined 回答1: You can use

问题 How do I implement a method with a variable number of arguments? In C#, we can use the params keyword: public class MyClass { public static void UseParams(params int[] list) { for (int i = 0; i < list.Length; i++) { Console.Write(list[i] + " "); } Console.WriteLine(); } } So how can I do this in F#? type MyClass() = member this.SomeMethod(params (args:string array)) = () I receive the following error from the code above: The pattern discriminator 'params' is not defined 回答1: You can use

来源： https://stackoverflow.com/questions/35242805/excel-udf-with-paramarray-constraint-like-sumifs

问题 What I used to have: Public Sub Subscribe(channel As ChannelType) Public Sub Subscribe(channels As IEnumerable(Of ChannelType)) The first one just calls the second one with {channel} to convert its parameter into an array. I decided that having to create a list of channels to pass to the method was awkward and chose to combine the two overloads into one method that takes a ParamArray . Public Sub Subscribe(ParamArray channels() As ChannelType) 'Usage Subscribe(ChannelType.News) Subscribe

问题 What I used to have: Public Sub Subscribe(channel As ChannelType) Public Sub Subscribe(channels As IEnumerable(Of ChannelType)) The first one just calls the second one with {channel} to convert its parameter into an array. I decided that having to create a list of channels to pass to the method was awkward and chose to combine the two overloads into one method that takes a ParamArray . Public Sub Subscribe(ParamArray channels() As ChannelType) 'Usage Subscribe(ChannelType.News) Subscribe

问题 I have a function that takes in a ParamArray that I'm trying to pass an unknown number of parameters into. I'm looping through rows and passing in numbers based on if the cells are empty or not, but it seems like I have to pass in each number as its own argument. I tried putting the numbers into an array and passing that, but it just ended up being an array of an array in the function and not working properly. Is there a way to do this? Thank you. Ex: Dim myarray() as double function test

问题 If I want to pass a number of values for the ParamArray arglist via an array, how do I do it? From what I've read so far, on VBA, it appears that I need to explicitly list the values that I want to pass. But what if there are potentially different numbers of values to pass, so I do not know in advance how many I'll want to pass to the function? Is there not some way of using an array (a one-dimensional array) with a variable dimension? 回答1: There are several ways to achieve that: dimension

问题 public ActionResult DoSomething(string[] arr, bool someBool, int someInt) { } trying to call the above method from jQuery: var test = []; test.push('dog'); test.push('cat'); $container.load('MyController/DoSomething', { 'arr[]': test, 'someBool': true, 'someInt': 1 }, function(response, status, xhr) { // ... }); the array paramater is null, other params are fine. What am I doing wrong? Chrome developer tools shows form data being submitted as arr%5B%5D%5B%5D:dog arr%5B%5D%5B%5D:cat someBool

问题 Some predefined methods contain a ParamArray in their signature. Delegates, however, cannot contain a ParamArray in their signature. Question: Assume you wish to create a delegation mechanism for a specific method which requires a ParamArray. How would you work around this constraint? EDIT: just to make clear, assume you cannot change the method signatures themselves (pre-defined methods, defined by some 3rd party, be it Microsoft or not). EDIT2: The real deal here is keeping the syntax sugar

问题 is it possible to pass all elements of an array to a ParamArray? For example I'd like to pass a ParamArray to another ParamArray: Sub test() p1 "test", "banane", "birne" End Sub Sub p1(ParamArray keys() As Variant) p2 keys 'should be the same as: p2 "test", "banane", "birne" End Sub Sub p2(ParamArray keys() As Variant) Dim key As Variant For Each key In keys Debug.Print key 'Run-time error '13' Type mismatch (key is an array) Next key End Sub In this case ParamArray of p2 doesn't contain the