library(data.table)
x <- data.table(
id = 8001:8006,
a = c("3", "5", "undefined", "21", "4", NA),
b = c("mango", "banana", "tangerine", NA, "apple", "kiwi"),
c = c(1, 2, 3, 4, 5, 6)
)
dt_inspect_types(x)
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