Add conditional that compare value to lookup table

[TobiasNx]

We have a list of records that we want to keep and a dump. We only want to keep the records that are also listed in a certain column. A conditional would be great that tests the values against a filemap.

put_filemap("path","newMap",...)

unless in_map("001","newMap","0")
	reject()
end

[TobiasNx]

Additional this should be able to check a simple textfile with one column.

[blackwinter]

Does this warrant a dedicated predicate? It should be possible to achieve the desired outcome with existing tools (untested):

put_filemap("path", "newMap", key_column: "0", value_column: "0")
copy_field("001", "@in_map")
lookup("@in_map", "newMap", delete: "true")
unless exists("@in_map")
  reject()
end

[TobiasNx]

Does this warrant a dedicated predicate? It should be possible to achieve the desired outcome with existing tools (untested):

put_filemap("path", "newMap", key_column: "0", value_column: "0")
copy_field("001", "@in_map")
lookup("@in_map", "newMap", delete: "true")
unless exists("@in_map")
  reject()
end

I think it would be ok.
How would this work with a single column textfile?

[blackwinter]

How would this work with a single column textfile?

Just specify expected_columns (1 or -1).

[TobiasNx]

This seems to work. Therefore closing.