parameter-passing

问题 I am trying to simplify my google apps script code and increase its readability. To this end, instead of calling setActiveSheet() function each time I want to activate a new sheet in my code, I decided to write a function that does the job and just call that function and include the name of the sheet as an argument like this: function setSheet (sheetName) { var sheetName; var spreadsheet = SpreadsheetApp.getActive(); spreadsheet.setActiveSheet(spreadsheet.getSheetByName(sheetName)); var sheet

问题 I want to do the same as here but with dplyr and one more column. I want to selecting a column via a string variable, but on top I also want to select a second column normally. I need this because I have a function which selects a couple of columns by a given parameters. I have the following code as an example: library(dplyr) data(cars) x <- "speed" cars %>% select_(x, dist) 回答1: You can use quote() for the dist column x <- "speed" cars %>% select_(x, quote(dist)) %>% head # speed dist # 1 4

问题 This question already has answers here : How does polymorphism work in Python? (3 answers) Python function overloading (14 answers) Closed 5 years ago . I'm learning Python (3.x) from a Java background. I have a python program where I create a personObject and add it to a list. p = Person("John") list.addPerson(p) But for flexibility I also want to be able to declare it directly in the addPerson method, like so: list.addPerson("John") The addPerson method will be able to differentiate whether

问题 I'm working on a homework project for a virtual rolodex that has called for a main class, a rolodex class, and a card class. To output the contents of all of the "cards" to the console, the assignment says that main() should call a show(...) function in the rolodex class, passing it an ostream and show(...) then iterates over the cards, calling each of their showCard() functions. The actual showing is done by the card objects' showCard() function, showing on the provided ostream. What I don't

问题 This question already has answers here : How do I return the response from an asynchronous call? (36 answers) Closed 4 years ago . EDITED as comment to duplicate I quote from: [How do I return the response from an asynchronous call? Promises are containers for future values. When the promise receives the value (it is resolved) or when it is cancelled (rejected), it notifies all of its "listeners" who want to access this value. This question is about how to return the value contained in the

问题 I have an array of values: ['a', 'b', 'c', 'd'] and I need to pass these as parameters to a function: window.myFunction('a', 'b', 'c', 'd'); This would be easier if I could just pass the array/object into the function, but the functions are written by other people or already exist and I cannot change them - they need to be passed as individual parameters, which is what I need solved. The number of values being passed is not consistent. It may be one, it may be 100. Again, I cannot affect the

问题 The only way I found to passing objects between the JS and Obj-C it's by encoding the JS object by using JSON.stringify() and pass the json string to PhoneGap.exec PhoneGap.exec('Alarm.update',JSON.stringify(list)); ... and rebuild the object in Obj-C: NSString *jsonStr = [arguments objectAtIndex:0]; jsonStr = [jsonStr stringByReplacingOccurrencesOfString:@"\\\"" withString:@"\""]; jsonStr = [NSString stringWithFormat:@"[%@]",jsonStr]; NSObject *arg = [jsonStr JSONValue]; It's that correct ?

问题 Running Windows 7, when I copy a file to an external disk, during a routine file backup , I use Powershell v2 (run from a batch file ) to re-create on the copy file all the timestamps of the original file. The following code works successfully in most cases, but not always:- SET file=%1 SET dest=E:\ COPY /V /Y %file% "%dest%" SetLocal EnableDelayedExpansion FOR /F "usebackq delims==" %%A IN ('%file%') DO ( SET fpath=%%~dpA SET fname=%%~nxA ) PowerShell.exe (Get-Item \"%dest%\%fname%\")

问题 I've got a flex app that is basically completed it uses Zend AMF to connect/supply data. My app does have a login screen which seems to work fine. Now I'd like to add another login form on my site that would allows users to enter in username/password. When submitted form should pass the data to the flex app and bypass the application's login. The only way I know how to do this is by passing the users input in the url which is obviously not ideal. How can I post the form data to use as

问题 So we've got a whole lot of Postgres SQL queries stored in files and used from PHP. The task is to replace PHP with Java. We want to reuse as much of the queries "as is" to keep the migration path short. I can't get the Array parameters to work. Here's a query example: update user_devices set some_date = now() where some_id in ( select distinct some_id from user_devices where user_id = any(:userIDs) and device_id = any(:deviceIDs) and exists (select 1 from users where user_id = any(:userIDs)