All the expressions to the right of the assignment operator are evaluated before any of the assignments are made. From the Python tutorial: First steps towards programming: The first line contains a multiple assignment: the variables a and b simultaneously get the new values 0 and 1. On the last line this is used again, … Read more
You have to make a reactive output returning the status of the uploading and set the option suspendWhenHidden of this output to FALSE. More precisely, in server.R you surely have a reactive function, say getData() to make a dataframe from the uploaded file. Then do this: getData <- reactive({ if(is.null(input$files)) return(NULL) …… }) output$fileUploaded <- … Read more
As of AppCompat version 21, the Action Bar follows the material design guidelines and uses a Toolbar: A title and subtitle. The title should be a signpost for the Toolbar’s current position in the navigation hierarchy and the content contained there. The subtitle, if present should indicate any extended information about the current content. If … Read more
Is http://api.xxx.com/ part of your domain? If not, you are being blocked by the same origin policy. You may want to check out the following Stack Overflow post for a few possible workarounds: Ways to circumvent the same-origin policy
I had the same issue and it was absolutely maddening. Here’s what the docs say on the MySQL website (emphasis mine) Should the driver try to re-establish stale and/or dead connections? If enabled the driver will throw an exception for a queries issued on a stale or dead connection, which belong to the current transaction, … Read more
Per the docs, don’t mix pack and grid in the same master window: Warning: Never mix grid and pack in the same master window. Tkinter will happily spend the rest of your lifetime trying to negotiate a solution that both managers are happy with. Instead of waiting, kill the application, and take another look at … Read more
As the docs explain, the CSV reader doesn’t perform automatic data conversion. You have the QUOTE_NONNUMERIC format option, but that would only convert all non-quoted fields into floats. This is a very similar behaviour to other csv readers. I don’t believe Python’s csv module would be of any help for this case at all. As … Read more
Download and install libusb-win32-devel-filter-1.2.6.0.exe. It should work.
There is no EOF character. EOF by definition “is unequal to any valid character code”. Often it is -1. It is not written into the file at any point. There is a historical EOF character value (CTRL+Z) in DOS, but it is obsolete these days. To answer the follow-up question of Apoorv: The OS never … Read more
Even if there is such a tool, I’d highly recommend you to do the conversion by hand. Automatic converters will often faithfully reproduce the code, but ignore idioms – because they’d be really, really hard to get right. Furthermore, the differences between generics in .NET and Java could lead to some very different decisions in … Read more