none
Checks that none of the rows in the DataFrame satisfy the predicate.
Returns Boolean — true if none of the rows satisfy the predicate, false otherwise.
df.none { rowCondition }
rowCondition: (DataRow) -> Boolean
When called on a DataColumn, checks that none of the values in the DataColumn satisfy the predicate.
Related operations: any, all, filter, count.
Examples
df
Check that none of the persons' age is greater than 21:
df.none { age > 21 }
Output:
true
Check that there is no person with age equal to 15 and name equal to "Alice":
df.none { age == 15 && name == "Alice" }
Output:
false
Check that there is no name "Charlie" in the name column:
df.name.none { it == "Charlie" }
Output:
true
25 September 2026