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Add checks for when there are no docvars #6

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kbenoit opened this issue May 9, 2020 · 0 comments

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kbenoit commented May 9, 2020

Things error when docvars are empty, e.g.

pull(corpus(letters[1:3]))
 Error: Can't extract columns that don't exist.
x The location 1 doesn't exist.
ℹ There are only 0 columns.

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