How to view the generated code for derived instances / deriving in Haskell

[亡魂溺海] 提交于 2020-07-02 11:34:29
问题 So, in Haskell, it's really easy to do this: data Foo = Bar | Baz deriving (Read, Show) This is great, but I'd like to be able to pass some data as a string from Haskell to the Elm language. The languages are similar enough that, if I had a Haskell implementation of Read, I could easily convert

PHP Read a txt file contains Q & A and create an array or an object?

橙三吉。 提交于 2020-06-29 06:41:39
问题 I have seen this functionality in moodle where they upload .txt files and parse data and create question bank . Some questions have three options as well Sample :- What is php? A. Php is a language. B. Php creates HTML. C. Php is fun. D. none of these. ANSWER: D Which is YII-2? A. Framework. B.

Map characters to elements or draw blocks using parsing a text file

好久不见. 提交于 2020-06-29 04:45:28
问题 I wanna map given strings from a text file to blocks, I mean actually draw blocks. I already have a BLOCK class which works, with the following constructor: public class Block implements Collidable, Sprite, HitNotifier { private List<HitListener> hitListeners; private Color color; private

Error in parse(outFile) : unexpected end of input - bug in package install, and how to fix

拟墨画扇 提交于 2020-06-29 04:30:12
问题 In trying to install my own package from GitHub I hit a problem that others have notified me about and I'd tried unsuccessfully to fix. I conclude that the package installer misinforms the user about the problem source, leading to fruitless searching for faults in working scripts. install_github(

error LNK2001: unresolved external symbol “class ATL::CTraceCategory ATL::atlTraceException” (?atlTraceException@ATL@@3VCTraceCategory@1@A)

微笑、不失礼 提交于 2020-06-28 05:27:47
问题 I am trying to run this program on Visual Studio 2013, but when I include an object - myparser.obj I am getting the following error: 1>MyParser.obj : error LNK2001: unresolved external symbol "class ATL::CTraceCategory ATL::atlTraceException" (?atlTraceException@ATL@@3VCTraceCategory@1@A) 1