Hi,
I came across a case where I cannot access a list element by its empty name.
Minimal example can be constructed as
x=list("A", 1)
names(x)=c("a", "")
x[["a"]]
#[1] "A"
x[[""]]
#NULL
x$`a`
#[1] "A"
x$``
# Error: attempt to use zero-length variable name
# but we can still access the second element by its index
x[[2]]
#[1] 1
To my mind, it should be perfectly legal to access an element by an
empty name as we can have for example
match("", names(x))
#[1] 2
Hence a traditional question: is it a bug or feature?
Best,
Serguei.
> sessionInfo()
R version 3.5.0 (2018-04-23)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Mageia 6
Matrix products: default
BLAS/LAPACK: /home/opt/OpenBLAS/lib/libopenblas_sandybridge-r0.3.0.dev.so
locale:
[1] C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] compiler_3.5.0
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