`fread` can't seem to use `col.names` and `colClasses` together
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Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 45/100
Research direction
Reproduce the MWE using data.table::fread with col.names and colClasses together, then trace the fread argument handling that produces the reported column-name error. Done means the example runs without error and returns columns a and b with character types; add or update a regression test for this combination.
Written by the indexing model from the issue text.
Description
I can't seem to use col.names and colClasses together in data.table::fread. See MWE
data.table::fwrite(cars, "cars.csv", col.names = FALSE)
data.table::fread("cars.csv", col.names = c("a","b"),
colClasses = list(a="character", b = "character"))
```
which produces the error
> Error in data.table::fread("cars.csv", col.names = c("a", "b"), colClasses = list(a = "character", :
> Column name 'character' in colClasses[[1]] not found- Dominant language
- R
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