问题标签 [haskell-optics]
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haskell - 从映射到其关联对的光学
我需要一个Fold (Map k v) (k, v)光学镜。有没有办法通过“光学”库获得它？如果没有，是否有“镜头”？
haskell - 模板-haskell中的单双引号/撇号有什么区别？
在使用Optics包学习 Haskell 镜头时，我遇到了以下示例：
类型的值Name代表什么，单引号和双引号/撇号之间有什么区别？
两者似乎具有相同的类型：
模板-haskell 文档对我来说是不可理解的。它侧重于语法，缺乏示例：
typescript - Customize Monocle policy regarding missing interposed nodes?
Is there a way in monocle (monocle-ts especially) to change the policy of how to handle missing interposed nodes in a structured data, such as in examples A, B and C below, to create them instead of no-oping? I have a use case where that different behavior is desirable. Can I work within the library to achieve it?
Further, can we define a policy to always replace empties during updates with undefined (recursively) so that the reverse operation is consistent?