Why do you equate using <<- with returning multiple items from a loop? There
are valid reasons to use <<-, but the people who want to use it practically
never have them.
Just return a list of the items you want to return from within the function.
squares <- mclapply(1:10, function(x){result <-
I sometimes need to return multiple items from a loop. Is it possible to have
the <<- operator work the same for mclapply as for lapply ?
> extra <- list()
> squares <- mclapply(1:10, function(x){extra[[x]] <<- x; x^2;})
> extra
list()
> squares <- lapply(1:10, function(x){extra[[x]] <<- x; x^2
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