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问题 I was trying .exceptionally and .handle but those don't seem to work. In scala, you can call a method on the future with a closure that is just like a finally block(it runs on exception AND on success) AND it propogates the exception or success up the chain as-is. I tried this... CompletableFuture<Object> future = newFuture.handle((r, e) -> { if(r != null) return r; else if(e != null) return e; else return new RuntimeException("Asdf"); }); Assert.assertTrue(future.isCompletedExceptionally());

问题 I am using the qrcode_gen() function from the qrcode package in R to generate a QR code, then place it on the top of a document (example linked below). The document is printed, written on, scanned, and stored as an image (.png) file. I would like to be able to read the QR code in R to get the imbedded text back. Eventually the whole process will be semi-automated in an Rshiny app, so I am hoping to keep everything in R , and not need to use an outside web tool to read the code. Has anyone

问题 Using plain old javascript version of ag-grid. I would like to destroy the ag-grid that is in a div from a button click event. How do i destroy the grid? 回答1: There is a method named destory() . As per documentation: destroy() Gets the grid to destroy and release resources. If you are using Angular (version 1 or 2) you do not need to call this, as the grid links in with the AngularJS 1.x lifecycle. However if you are using Web Components or native Javascript, you do need to call this, to

问题 Using plain old javascript version of ag-grid. I would like to destroy the ag-grid that is in a div from a button click event. How do i destroy the grid? 回答1: There is a method named destory() . As per documentation: destroy() Gets the grid to destroy and release resources. If you are using Angular (version 1 or 2) you do not need to call this, as the grid links in with the AngularJS 1.x lifecycle. However if you are using Web Components or native Javascript, you do need to call this, to

问题 I am using the qrcode_gen() function from the qrcode package in R to generate a QR code, then place it on the top of a document (example linked below). The document is printed, written on, scanned, and stored as an image (.png) file. I would like to be able to read the QR code in R to get the imbedded text back. Eventually the whole process will be semi-automated in an Rshiny app, so I am hoping to keep everything in R , and not need to use an outside web tool to read the code. Has anyone

问题 I have an ASP.NET Core 2.1 app that I've hosted in an Azure app service. When executed locally I'm able to access the controller. But when I host in an Azure app I receive a 404. Here are the minimal steps to reproduce. In Visual Studio 2017 add a new project. Select ASP.NET Core Web Application. Select ASP.NET Core 2.1, API project template, no authentication, configure for HTTPS. Run the new app as a self hosted (not using IIS). Browse to https://localhost:5001/api/values. I get the

问题 Using plain old javascript version of ag-grid. I would like to destroy the ag-grid that is in a div from a button click event. How do i destroy the grid? 回答1: There is a method named destory() . As per documentation: destroy() Gets the grid to destroy and release resources. If you are using Angular (version 1 or 2) you do not need to call this, as the grid links in with the AngularJS 1.x lifecycle. However if you are using Web Components or native Javascript, you do need to call this, to

问题 I have a list of lengths for pipes and I need fit these lengths within maximum allowed length for the best yield For example the max allowed length is 90 and the pieces I need to make are: 25, 60, 13, 48, 23, 29, 27, 22 For the best fit within 90 I'd have a group of these numbers: 60, 29 (89 total) 27, 25, 13, 23 (88 total) 48, 22 (70 total) I found this answer to similar question, but I don't know how to convert it to use in excel or javascript or php Any help would be appreciated. Thank you

问题 I have a list of lengths for pipes and I need fit these lengths within maximum allowed length for the best yield For example the max allowed length is 90 and the pieces I need to make are: 25, 60, 13, 48, 23, 29, 27, 22 For the best fit within 90 I'd have a group of these numbers: 60, 29 (89 total) 27, 25, 13, 23 (88 total) 48, 22 (70 total) I found this answer to similar question, but I don't know how to convert it to use in excel or javascript or php Any help would be appreciated. Thank you

问题 I am currently implementing a MINLP optimization problem in Python GEKKO for determining the optimal operational strategy of a trigeneration energy system. As I consider the energy demand during all periods of different representative days as input data, basically all my decision variables, intermediates, etc. are 2D arrays. I suspect that the declaration of the 2D intermediates is my problem. Right now I used list comprehension to declare 2D intermediates, but it seems like python cannot use