Get the future of a future variable
Get the future of a future variable that has been created directly
or indirectly via future().
futureOf( var = NULL, envir = parent.frame(), mustExist = TRUE, default = NA, drop = FALSE )
var |
the variable. If NULL, all futures in the environment are returned. |
envir |
the environment where to search from. |
mustExist |
If TRUE and the variable does not exists, then an informative error is thrown, otherwise NA is returned. |
default |
the default value if future was not found. |
drop |
if TRUE and |
A Future (or default).
If var is NULL, then a named list of Future:s are returned.
a %<-% { 1 }
f <- futureOf(a)
print(f)
b %<-% { 2 }
f <- futureOf(b)
print(f)
## All futures
fs <- futureOf()
print(fs)
## Futures part of environment
env <- new.env()
env$c %<-% { 3 }
f <- futureOf(env$c)
print(f)
f2 <- futureOf(c, envir = env)
print(f2)
f3 <- futureOf("c", envir = env)
print(f3)
fs <- futureOf(envir = env)
print(fs)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.