Draft vignette of The Bank Tutorial Part 1 from SimPy v2

[nacnudus]

First draft. Sorry this took so long. The section "More customers" is a bit hacky -- see #65.

[coveralls]

Coverage remained the same at 92.657% when pulling 76dbb2e on nacnudus:bank into de607ee on r-simmer:master.

[Enchufa2]

Awesome job, thank you very much! Some comments:

• As I said in Performance improvement: batched generation #65, every is going to be removed, because, since Performance improvement: batched generation #65, its behaviour can be easily replicated with function() c(...). Please, use its old recipe to define this wait function, as you already did, and remove the references to every.
• I would like this vignette (and future parts) to appear right after Advanced Trajectory Usage. So, please, rename the files as
  • D-bank-1.Rmd
  • E-queueing-systems.Rmd
  • F-ctmc.Rmd
• Please, specify {r, message=FALSE} in those chunks where you load dplyr in order to hide the attaching messages.
• Of course, if you wish, you can use Python chunks in order to make comparisons, etc. Also your judgement is welcome: "this is easier with SimPy, this is more intuitive with simmer"... what you feel is appropriate. 😉

[nacnudus]

Useful comments, thanks.

• Instead of every, I've used it's old recipe and called it loop. Since it's a slightly fancy use of environments, I've linked to Advanced R rather than explain exactly how it works.
• Might SimPy comparisons be better in a separate vignette? Then the Bank ones would be suitable for teaching a pure simmer class.

[coveralls]

Coverage remained the same at 92.657% when pulling 0b0d63a on nacnudus:bank into de607ee on r-simmer:master.

[Enchufa2]

Instead of every, I've used it's old recipe and called it loop. Since it's a slightly fancy use of environments, I've linked to Advanced R rather than explain exactly how it works.

Very appropriate. Maybe it's worth mentioning also that this kind of construction is called closure in R.

Might SimPy comparisons be better in a separate vignette? Then the Bank ones would be suitable for teaching a pure simmer class.

Ok. Totally agree.

BTW, there is still a chunk using every.

[nacnudus]

Oops. Mentioned closure, removed the stray every chunk, and squashed the commits.

[Enchufa2]

Perfect! Thanks again! Merging...

[coveralls]

Coverage remained the same at 92.657% when pulling dcaf0ea on nacnudus:bank into de607ee on r-simmer:master.