8.6 does not work for me #77
Description
Hi, the approach of:
setup <- function(deck) {
DECK <- deck
DEAL <- function() {
card <- deck[1, ]
assign("deck", deck[-1, ], envir = globalenv())
card
}
SHUFFLE <- function(){
random <- sample(1:52, size = 52)
assign("deck", DECK[random, ], envir = globalenv())
}
list(deal = DEAL, shuffle = SHUFFLE)
}
cards <- setup(deck)
gives at my end an ogoing deal() output of 1 king spades 13.
I do not understand why this happens (on R4.3.3 on Slackware64 linux with RStudio 2023.12.1 Build 402).
My unsuccessful run:
> decki <- deck
> decki$value
[1] 13 12 11 10 9 8 7 6 5 4 3 2 1 13 12 11 10 9 8 7 6
[22] 5 4 3 2 1 13 12 11 10 9 8 7 6 5 4 3 2 1 13 12 11
[43] 10 9 8 7 6 5 4 3 2 1
> setup <- function(decki) {
+ DECK <- decki
+
+ DEAL <- function() {
+ card <- decki[1, ]
+ assign("decki", decki[-1, ], envir = globalenv())
+ card
+ }
+
+ SHUFFLE <- function(){
+ random <- sample(1:52, size = 52)
+ assign("decki", DECK[random, ], envir = globalenv())
+ }
+
+ list(deal = DEAL, shuffle = SHUFFLE)
+ }
> decki$value
[1] 13 12 11 10 9 8 7 6 5 4 3 2 1 13 12 11 10 9 8 7 6
[22] 5 4 3 2 1 13 12 11 10 9 8 7 6 5 4 3 2 1 13 12 11
[43] 10 9 8 7 6 5 4 3 2 1
> cards <- setup(decki)
> deal <- cards$deal
> shuffle <- cards$shuffle
> decki$value
[1] 13 12 11 10 9 8 7 6 5 4 3 2 1 13 12 11 10 9 8 7 6
[22] 5 4 3 2 1 13 12 11 10 9 8 7 6 5 4 3 2 1 13 12 11
[43] 10 9 8 7 6 5 4 3 2 1
> shuffle()
> decki$value
[1] 8 9 11 6 4 5 13 4 3 6 1 5 7 13 2 10 6 7 7 6 1
[22] 8 3 10 11 13 12 7 4 9 11 9 12 10 11 2 3 12 1 9 13 5
[43] 8 2 4 5 2 1 12 8 3 10
> deal()
face suit value
1 king spades 13
> deal()
face suit value
1 king spades 13
> deal()
face suit value
1 king spades 13
> shuffle()
> decki$value
[1] 8 8 1 4 7 9 6 2 11 6 13 7 10 9 11 1 7 6 2 12 5
[22] 13 12 11 10 6 13 2 4 8 9 13 2 4 3 12 3 1 5 12 3 9
[43] 10 4 1 8 5 10 5 11 7 3
> deal()
face suit value
1 king spades 13
> deal()
face suit value
1 king spades 13
> deal()
face suit value
1 king spades 13
> deal()
face suit value
1 king spades 13
> globalenv()
<environment: R_GlobalEnv>
> environment()
<environment: R_GlobalEnv>
> environment(setup)
<environment: R_GlobalEnv>
> environment(deal)
<environment: 0x5620e4976028>
> environment(shuffle)
<environment: 0x5620e4976028>
> environment(deck)
I only got this to work with changing all calls to refer to the setup-environment; not the global one. With an extra function STOCK that returns the current state of the used deck one can see what happens after SHUFFLE and DEAL...
#> deckj <- deck
> setup2 <- function(deckj){
+ DECK <- deckj
+
+ DEAL <- function(){
+ card <- DECK[1, ]
+ assign("DECK", DECK[-1, ], envir = parent.env(environment()))
+ card
+ }
+
+ SHUFFLE <- function(){
+ random <- sample(1:52, size = 52)
+ assign("DECK", deckj[random, ], envir = parent.env(environment()))
+ }
+
+ STOCK <- function(){
+ DECK
+ }
+
+ list(deal2 = DEAL, shuffle2 = SHUFFLE, stock2 = STOCK)
+ }
> cards2 <- setup2(deck)
> cards2
$deal2
function(){
card <- DECK[1, ]
assign("DECK", DECK[-1, ], envir = parent.env(environment()))
card
}
<bytecode: 0x5620e5b7b8b8>
<environment: 0x5620e719c620>
$shuffle2
function(){
random <- sample(1:52, size = 52)
assign("DECK", deckj[random, ], envir = parent.env(environment()))
}
<bytecode: 0x5620e4b486f8>
<environment: 0x5620e719c620>
$stock2
function(){
DECK
}
<bytecode: 0x5620e4a23750>
<environment: 0x5620e719c620>
> deal2 <- cards2$deal2
> shuffle2 <- cards2$shuffle2
> stock2 <- cards2$stock2
> stock2()$value
[1] 13 12 11 10 9 8 7 6 5 4 3 2 1 13 12 11 10 9 8 7 6
[22] 5 4 3 2 1 13 12 11 10 9 8 7 6 5 4 3 2 1 13 12 11
[43] 10 9 8 7 6 5 4 3 2 1
> shuffle2()
> stock2()$value
[1] 8 1 6 5 1 3 6 3 9 10 11 7 5 13 12 9 4 5 12 11 6
[22] 12 7 12 5 8 8 7 10 10 4 8 2 13 3 11 11 1 13 6 3 9
[43] 7 9 2 13 1 10 4 2 4 2
> deal2()
face suit value
19 eight clubs 8
> deal2()
face suit value
26 ace clubs 1
> deal2()
face suit value
8 six spades 6
> deal2()
face suit value
35 five diamonds 5
> stock2()$value
[1] 1 3 6 3 9 10 11 7 5 13 12 9 4 5 12 11 6 12 7 12 5
[22] 8 8 7 10 10 4 8 2 13 3 11 11 1 13 6 3 9 7 9 2 13
[43] 1 10 4 2 4 2
> deal()
Error in deal() : could not find function "deal"
> deal2()
face suit value
39 ace diamonds 1
Trying the original setup again:
> decki$value
[1] 12 11 10 9 8 7 6 5 4 3 2 1 13 12 11 10 9 8 7 6 5
[22] 4 3 2 1 13 12 11 10 9 8 7 6 5 4 3 2 1 13 12 11 10
[43] 9 8 7 6 5 4 3 2 1
> rm(decki)
> rm(deal)
> rm(shuffle)
> decki <- deck
> setup3 <- function(decki) {
+ DECK <- decki
+
+ DEAL <- function() {
+ card <- decki[1, ]
+ assign("decki", decki[-1, ], envir = globalenv())
+ card
+ }
+
+ SHUFFLE <- function(){
+ random <- sample(1:52, size = 52)
+ assign("decki", DECK[random, ], envir = globalenv())
+ }
+
+ list(deal3 = DEAL, shuffle3 = SHUFFLE)
+ }
> decki$value
[1] 13 12 11 10 9 8 7 6 5 4 3 2 1 13 12 11 10 9 8 7 6
[22] 5 4 3 2 1 13 12 11 10 9 8 7 6 5 4 3 2 1 13 12 11
[43] 10 9 8 7 6 5 4 3 2 1
> cards3 <- setup3(decki)
> deal3 <- cards3$deal3
> shuffle3 <- cards3$shuffle3
> shuffle3()
> decki$value
[1] 11 6 9 2 9 1 2 12 5 12 4 3 3 6 3 7 4 9 8 10 1
[22] 7 4 1 6 9 4 5 10 11 11 13 2 10 6 12 13 8 8 7 8 7
[43] 5 13 3 13 12 11 10 1 5 2
> deal3()
face suit value
1 king spades 13
> deal3()
face suit value
1 king spades 13
> deal3()
face suit value
1 king spades 13
> decki$value
[1] 12 11 10 9 8 7 6 5 4 3 2 1 13 12 11 10 9 8 7 6 5
[22] 4 3 2 1 13 12 11 10 9 8 7 6 5 4 3 2 1 13 12 11 10
[43] 9 8 7 6 5 4 3 2 1
>
The original decki is returned after deal(), not the shuffled one...