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Using the addition operator for manipulation is a bit unusual. Why did you choose it? I don't have R studio or anything on my computer, so I can't test it, but

by tgv 2y ago

Using the addition operator for manipulation is a bit unusual. Why did you choose it? I don't have R studio or anything on my computer, so I can't test it, but do things like music <- Music() + Meter(4, 4) + Line(...) + (Line(...) + Articulation(">", 1)) work?

nomonnai 2y ago
In base R, `+` is the usual arithmetic operator for numeric and complex vectors. I'm not a super R expert but I'm pretty sure the addition operator is overloaded here. It simply means: add(Music(), Meter(4, 4), Line(...), Line(...), Articulation(">", 1)) Edit. Found the definition in the source [1]. I think the approach is similar to Go's approach to method definition [2]. Methods are defined on types, i.e., methods are functions with special receiver arguments. The infix notation instead of prefix notation is just syntactic sugar. [1] https://github.com/flujoo/gm/blob/69d639be86b0cef80d815a73a605ad7f9f5e0ce2/R/2-add-music.R#L27 https://github.com/flujoo/gm/blob/69d639be86b0cef80d815a73a6... [2] https://go.dev/tour/methods/1 https://go.dev/tour/methods/1
deleted 2y ago
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andylynch 2y ago
This is quite idiomatic for R; packages like ggplot do the same thing to, for instance, build up graphics- see https://r4ds.hadley.nz/data-visualize https://r4ds.hadley.nz/data-visualize for some nice examples
- erikgahner 2y ago
  ggplot2 is pretty much an exception at this point, and if the package was created today it would use the pipe instead of add [1]. Most packages use pipes now (especially with the introduction of the pipe operator in R 4.1.0). [1] https://forum.posit.co/t/why-cant-ggplot2-use/4372/7 https://forum.posit.co/t/why-cant-ggplot2-use/4372/7
  - deleted 2y ago
    [deleted]
  - dr_kiszonka 2y ago
    I am no R expert, but pipes don't seem the most intuitive for ggplot. This is because they would imply that, e.g., ggtitle() %>% geom_point() means that ggtitle() outputs an input for geom_point().
    - hadley 2y ago
      That’s exactly how ggplot (not 2!) worked: https://github.com/hadley/ggplot1 https://github.com/hadley/ggplot1
hackoo 2y ago
In creating a music score, you literally "add" components to the score. So it's natural to implement this operation this way. From the OOP perspective, it's just method overloading. Not uncommon in R development.
tetris11 2y ago
R is a Lisp dialect in disguise.

by tgv 2y ago

nomonnai 2y ago

In base R, `+` is the usual arithmetic operator for numeric and complex vectors. I'm not a super R expert but I'm pretty sure the addition operator is overloaded here. It simply means: add(Music(), Meter(4, 4), Line(...), Line(...), Articulation(">", 1)) Edit. Found the definition in the source [1]. I think the approach is similar to Go's approach to method definition [2]. Methods are defined on types, i.e., methods are functions with special receiver arguments. The infix notation instead of prefix notation is just syntactic sugar. [1] https://github.com/flujoo/gm/blob/69d639be86b0cef80d815a73a605ad7f9f5e0ce2/R/2-add-music.R#L27 https://github.com/flujoo/gm/blob/69d639be86b0cef80d815a73a6... [2] https://go.dev/tour/methods/1 https://go.dev/tour/methods/1

deleted 2y ago

[deleted]

andylynch 2y ago

This is quite idiomatic for R; packages like ggplot do the same thing to, for instance, build up graphics- see https://r4ds.hadley.nz/data-visualize https://r4ds.hadley.nz/data-visualize for some nice examples

erikgahner 2y ago
ggplot2 is pretty much an exception at this point, and if the package was created today it would use the pipe instead of add [1]. Most packages use pipes now (especially with the introduction of the pipe operator in R 4.1.0). [1] https://forum.posit.co/t/why-cant-ggplot2-use/4372/7 https://forum.posit.co/t/why-cant-ggplot2-use/4372/7
- deleted 2y ago
  [deleted]
- dr_kiszonka 2y ago
  I am no R expert, but pipes don't seem the most intuitive for ggplot. This is because they would imply that, e.g., ggtitle() %>% geom_point() means that ggtitle() outputs an input for geom_point().
  - hadley 2y ago
    That’s exactly how ggplot (not 2!) worked: https://github.com/hadley/ggplot1 https://github.com/hadley/ggplot1

hackoo 2y ago

In creating a music score, you literally "add" components to the score. So it's natural to implement this operation this way. From the OOP perspective, it's just method overloading. Not uncommon in R development.

tetris11 2y ago

R is a Lisp dialect in disguise.