Hi Everyone,
I'm working on a thorny subsetting problem involving list of lists. I've put a
dput of the data here:
https://gist.githubusercontent.com/aronlindberg/b916dee897d051ac5be5/raw/a78cbf873a7e865c3173f943ff6309ea688c653b/dput
I can get one intense of the element I want this way:
> input[[67]]$content[[1]]$sha
[1] "58cf43ecdc1beb7e1043e9de612ecc817b090f15"
However, I need to use a lapply function to loop over all of the items of the
list. I've tried something like this, but it doesn't work:
get_shas <- function(input){
x <- sapply(input, "[[", "content")
y <- sapply(x, "[[", "sha")
return(y)
}
sha_lists <- lapply(commit_lists, get_shas)
However, this doesn't work. When I run each of the lapply commands "manually"
it returns NULL for every list, and when I run the whole apply function it
says:
Error in FUN(X[[1L]], ...) : subscript out of bounds
I've tried reading the sections on lists and subsetting in Hadley's Advanced R,
but I still cannot figure it out. Can anyone help or offer a pointer?
Best,
Aron
--
Aron Lindberg
Doctoral Candidate, Information Systems
Weatherhead School of Management
Case Western Reserve University
aronlindberg.github.io
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