keyword

Basically, I want to set up a function that uses 'for' as a parameter for readability. enum Genre { case drama case comedy } func setupTable(for: Genre) { switch for { case .drama: break case .comedy: break } } I set something like this up but when i try and use the switch for 'for' it comes up as a keyword and throws a compile error. Cheers When using a keyword as a normal identifier you have to escape it using backticks ` like this func setupTable(for: Genre) { switch `for` { case .drama: break case .comedy: break } } 来源： https://stackoverflow.com/questions/47212853/can-we-use-keywords-as

For instance, I know that it is possible to do something in Javascript that allows users to update text based on user text input: <script type="text/javascript"> function changeText2(){ var userInput = document.getElementById('userInput').value; document.getElementById('boldStuff2').innerHTML = userInput; } </script> <p>Welcome to the site <b id='boldStuff2'>dude</b> </p> <input type='text' id='userInput' value='Enter Text Here' /> <input type='button' onclick='changeText2()' value='Change Text'/> View the above code in action at: tizag.com/javascriptT/javascript-innerHTML.php However, instead

Possible Duplicate: Why can’t Python handle true/false values as I expect? Seems a stupid question, but why is the following statement in Python not explicitly forbidden? >> True=False >> True False How is True and False handled by Python interpreter? True , just like str or any other builtin, is just a name that exists in the scope by default. You can rebind it like any other such name. Python actually has very few reserved words . All the rest are subject to redefinition. It's up to you to be careful! >>> True = False False In the above assignment, True is just a variable like any other

Duplicate : What does the 'static' keyword do in a class? I've read this post already. What does the "static" keyword in a method do? I remember being told that static != clingy...but that is pretty much all I know about this keyword. Starkii Static class variables can be thought of as a global class. No matter how many instances of the class you have, there is just one instance of each static variable. Static methods don't use any non-static class variables and they can be called directly from outside of the class without having to instantiate the class itself. A static method belongs to the

I am using Selenium2 w RF to test GUI of rather complex web application. Since I do get some fails with elements load, would like to know what are differences between keywords: Wait Until Element Is Enabled locator Wait Until Element Is Visible locator Wait Until Page Contains Element locator What is the scoope of each one and which keyword is most reliable in case, when I wanna check if element of the page is fully loaded and ready to use? Is there a keyword that checks if a full page is loaded? I don't know what you mean by "scope". They all work in the same scope. Wait Until Element Is

New to R. I am looking to remove certain words from a data frame. Since there are multiple words, I would like to define this list of words as a string, and use gsub to remove. Then convert back to a dataframe and maintain same structure. wordstoremove <- c("ai", "computing", "ulitzer", "ibm", "privacy", "cognitive") a id text time username 1 "ai and x" 10 "me" 2 "and computing" 5 "you" 3 "nothing" 15 "everyone" 4 "ibm privacy" 0 "know" I was thinking something like: a2 <- apply(a, 1, gsub(wordstoremove, "", a) but clearly this doesnt work, before converting back to a data frame. wordstoremove

My first F# day. If I have this: let cat = Animal() Now how do I check at later stage if cat is Animal ? In C# bool b = cat is Animal; In F#? @ildjarn deserves the credit here for answering first, but I'm submitting the answer here so it can be accepted. The F# equivalent of the C# is keyword is :? . For example: let cat = Animal() if cat :? Animal then printfn "cat is an animal." else printfn "cat is not an animal." For demonstration only (don't define an is function): let is<'T> (x: obj) = x :? 'T type Animal() = class end type Cat() = inherit Animal() let cat = Cat() cat |> is<Animal> /

We can do: NaN = 'foo' as well as undefined = 'foo' Why they are not reserved keywords? Edit 1 (DownVoters): I think it should be implemented in order to be sure that when we are looking for a number , it is a number :) If we should use IsNaN() or typeof so why NaN or undefined are needed? https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/NaN NaN is a property of the global object. The initial value of NaN is Not-A-Number — the same as the value of Number.NaN. In modern browsers, NaN is a non-configurable, non-writable property. Even when this is not the case, avoid