Update docs about splitCsv() operator (#4163)

Signed-off-by: Jesse <90865804+dxu104@users.noreply.github.com> Signed-off-by: Paolo Di Tommaso <paolo.ditommaso@gmail.com> Co-authored-by: Paolo Di Tommaso <paolo.ditommaso@gmail.com>
nextflow-io · Sep 3, 2023 · 1dfb621 · 1dfb621
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commit 1dfb621
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diff --git a/docs/operator.md b/docs/operator.md
@@ -1384,6 +1384,10 @@ Channel
     .splitCsv(header: ['col1', 'col2', 'col3'], skip: 1 )
     .view { row -> "${row.col1} - ${row.col2} - ${row.col3}" }
 ```
+:::{note}
+- By default, the `splitCsv` operator returns each row as a *list* object. Items are accessed by using the 0-based column index.
+- When the `header` is specified each row is returned as a *map* object (also known as dictionary). Items are accessed via the corresponding column name. 
+:::
 
 Available options: