Take the following code:
 foo <- list()

foo[[1]] <- list(a=1, b=2)
foo[[2]] <- list(a=11, b=22)
foo[[3]] <- list(a=111, b=222)

result <- do.call(rbind, foo)
result[,'a']

In this case, result[,'a'] shows a list. Is there a more elegant way such
that result is a "regular" matrix of vectors? I imagine there are manual
ways of going about this, but I was wondering if there was an obvious step
that I was missing.

Thanks,
Andrew

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