R Under development (unstable) (2023-12-18 r85702 ucrt) -- "Unsuffered Consequences"
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> ## Test and learn scoping and environments
> ## I need to refine this and add more notes related to whay I learned
> 
> run.test.environments <- FALSE
> 
> if(run.test.environments){
+ 
+   ## Scoping, frames and environments
+   g <- function(a, b, c = 0) a + b + c
+   print(parent.frame())  
+   f1 <- function(){
+     x <- 1
+     print(ls())
+     print(ls(envir = parent.frame()))
+     print(parent.frame())
+     f2 <- function(){
+       w <- 2
+       print(ls())
+       print(ls(envir = parent.frame()))
+       print(parent.frame())
+       ans1 <- g(a = w, eval(x))
+       f3 <- function(){
+         print(ls(envir = parent.frame()))  
+         print(parent.frame())
+         print(eval(x))
+         z <- eval(ans1) + eval(w) + eval(x)
+       }
+       ans1 <- f3()
+     }
+     ans <- f2()
+     ans
+   }
+   
+ }
> 
> proc.time()
   user  system elapsed 
   0.09    0.06    0.14