withHead method

DataFrame withHead([
  1. int n = 10
])

A new data frame with only the first n rows.

Example:

print(petals.withHead(3));


.--.------------.-----------.--------.
|id|petal_length|petal_width|species |
:--+------------+-----------+--------:
|1 |1.4         |0.2        |setosa  |
|2 |1.4         |0.2        |setosa  |
|3 |1.3         |0.2        |setosa  |
'--'------------'-----------'--------'

Implementation

DataFrame withHead([int n = 10]) {
  final numberOfRows = this.rowNumber;
  return withRowsAtIndices(
      [for (var i = 0; i < math.min(numberOfRows, n); i++) i]);
}