params

问题 Assume that I have two input boxes with corresponding ng-model as fname and lname. If I call http request as : $http({method:'GET', url:'/search', params:{fname: fname, lname: lname}}) will it call to the url : /search?fname=fname&lname=lname The error I am getting at the backend(python) is : cannot concatenate str and nontype objects. Are these parameters not sent as strings? If not, how to get around with this? 回答1: Here is how you do it: $http.get("/url/to/resource/", {params:{"param1":

问题 I wonder if there\'s any way something like this would be possible for value types... public static class ExtensionMethods { public static void SetTo(this Boolean source, params Boolean[] bools) { for (int i = 0; i < bools.Length; i++) { bools[i] = source; } } } then this would be possible: Boolean a = true, b, c = true, d = true, e; b.SetTo(a, c, d, e); Of course, this does not work because the bools are a value type so they are passed into the function as a value, not as a reference. Other

问题 Using select_date gives me back a params[:my_date] with year , month and day attributes. How do get a Date object easily? I\'m hoping for something like params[:my_date].to_date . I\'m happy to use date_select instead as well. 回答1: Using date_select gives you 3 separate key/value pairs for the day, month, and year respectively. So you can pass them into Date.new as parameters to create a new Date object. An example date_select returned params for an Event model: "event"=> {"name"=>"Birthday",

问题 Does C# support a variable number of arguments? If yes, How does C# support variable no of arguments? What are the examples? How are variable arguments useful? EDIT 1 : What are the restrictions on it? EDIT 2 : The Question is not about Optional param But Variable Param 回答1: Yes. The classic example wourld be the params object[] args : //Allows to pass in any number and types of parameters public static void Program(params object[] args) A typical usecase would be passing parameters in a

问题 In C#, if you want a method to have an indeterminate number of parameters, you can make the final parameter in the method signature a params so that the method parameter looks like an array but allows everyone using the method to pass as many parameters of that type as the caller wants. I\'m fairly sure Java supports similar behaviour, but I cant find out how to do it. 回答1: In Java it's called varargs, and the syntax looks like a regular parameter, but with an ellipsis ("...") after the type:

问题 Say I have the following methods: public static void MyCoolMethod(params object[] allObjects) { } public static void MyCoolMethod(object oneAlone, params object[] restOfTheObjects) { } If I do this: MyCoolMethod(\"Hi\", \"test\"); which one gets called and why? 回答1: It's easy to test - the second method gets called. As to why - the C# language specification has some pretty detailed rules about how ambiguous function declarations get resolved. There are lots of questions on SO surrounding

问题 How can i create a method that has optional parameters and params together? static void Main(string[] args) { TestOptional(\"A\",C: \"D\", \"E\");//this will not build TestOptional(\"A\",C: \"D\"); //this does work , but i can only set 1 param Console.ReadLine(); } public static void TestOptional(string A, int B = 0, params string[] C) { Console.WriteLine(A); Console.WriteLine(B); Console.WriteLine(C.Count()); } 回答1: Your only option right now is to overload the TestOptional (as you had to do

问题 I know this is a basic question, but I couldn\'t find an answer. Why use it? if you write a function or a method that\'s using it, when you remove it the code will still work perfectly, 100% as without it. E.g: With params: static public int addTwoEach(params int[] args) { int sum = 0; foreach (var item in args) sum += item + 2; return sum; } Without params: static public int addTwoEach(int[] args) { int sum = 0; foreach (var item in args) sum += item + 2; return sum; } 回答1: With params you