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  • Hacker News
  • Can this be used for Read-Copy-Update (RCU) ?
    by Archit3ch
  • Is set basically syntactic sugar for deepcopying a struct, mutating the specified field, and then returning that deepcopy? Seems like it could be quite slow.
    by dopu
  • Is Julia a general purpose programming language? I mean I did check the web site which contains a "General Purpose" section, yet the articles seem to center around "scientific applications".
    by jhoechtl
  • Guys, What's you're opinion on Julia?

    I am thinking of using it for data science work.

    Any draw backs? or advantages I should know about?

    by max_
  • I have to admit I don’t really understand the point of doing this instead of just obj.a = 2 or whatever.
    by binary132
  • Was hoping this was data lenses, like cambria from ink&switch

    https://www.inkandswitch.com/cambria/

    Not sure how "A Lens allows to access or replace deeply nested parts of complicated objects." is any different from writing a function to do the same?

    Julia curious, very little experience

    by verdverm
  • Certain aspects of this me of the modf macro for Common Lisp:

    https://github.com/smithzvk/modf

    You use place syntax like what is used with incf or setf, denoting part of some complex object. But the modification is made to the corresponding part of a copy of the object, and the entire new object is returned.

    by kazinator
  • Nice to see this passed around on Hacker News. I think the whole concept of lenses is super cool and useful, but suffered from the usual Haskellificiation problems of being presented in an unnecessarily convoluted way.

    I think Accessors.jl has a quite nice and usable implementation of lenses, it's something I use a lot even in code where I'm working with a lot of mutable data because it's nice to localize and have exact control over what gets mutated and when (and I often find myself storing some pretty complex immutable data in more 'simple' mutable containers)

    by eigenspace

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