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Wrong behaviour DT[, i, with=FALSE]  #2109

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#3775
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Wrong behaviour DT[, i, with=FALSE] #2109
#3775
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MarkusBonsch
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bug
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1.12.4

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@cguill95
cguill95
opened on Apr 10, 2017

Hi,

I noticed a strange type of behaviour using the with=FALSE parameter in a data table.
Maybe worth mentioning I am using data table version 1.10.4. on R 3.3.2

Here is a reproducible example;

library(data.table)
test <- data.table(mtcars)
i <- 3L

# Print 3rd column
test[, i, with=FALSE]

# Print 4th column
test[, i + 1L, with=FALSE]

# Print all but 3rd column
test[, i - 1L, with=FALSE]

Activity

  1. franknarf1 commented on Apr 10, 2017

    @franknarf1
    franknarf1
    on Apr 10, 2017
    Contributor

    Yeah, I guess it parses the expression, sees that - is the top-level function and wings it from there somehow, similar to this bug: #2069 Parentheses stop it: test[, (i - 1L), with=FALSE]

  2. arunsrinivasan commented on Jun 29, 2017

    @arunsrinivasan
    arunsrinivasan
    on Jun 29, 2017
    Member

    IIUC this line would need a length(jsub) == 2L extra condition...

  3. arunsrinivasan
    added
    bug
    on Jun 29, 2017
  4. MarkusBonsch
    self-assigned this
    on Feb 14, 2018
  5. MichaelChirico
    added a commit that references this issue on Aug 18, 2019

    Closes #2109 -- restrict negation in !with to unary -/!

    ca41b6b
  6. mattdowle
    added this to the 1.12.4 milestone on Aug 28, 2019
  7. mattdowle
    closed this as completedin #3775on Aug 28, 2019
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