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Reading a list of columns

ADITYA VOORA

Hi,

i want a skill program for reading a list of columns

if it is two columns it want to show error

if it is one column it want give true

this should be happen in entire list

Parents

  • Your question is still very poorly framed. So let me give some assumptions and a possible solution. If you have two lists:

    good=list(
      list("cell1")
      list("cell2")
      list("cell3")
    )

    bad=list(
      list("cell1")
      list("cell2" "info2")
      list("cell3" "info3")
    )

    then you could do:

    data=bad ; or data=good
    when(exists(row data cdr(row))
      error("more than one column")
    )

    Andrew.

Reply

  • Your question is still very poorly framed. So let me give some assumptions and a possible solution. If you have two lists:

    good=list(
      list("cell1")
      list("cell2")
      list("cell3")
    )

    bad=list(
      list("cell1")
      list("cell2" "info2")
      list("cell3" "info3")
    )

    then you could do:

    data=bad ; or data=good
    when(exists(row data cdr(row))
      error("more than one column")
    )

    Andrew.

Children
No Data

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