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Version: Java (Groovy)

lastBy

lastBy returns the last row for each group.

Syntax​

table.lastBy()
table.lastBy(groupByColumns...)

Parameters​

ParameterTypeDescription
groupByColumnsString...The column(s) by which to group data.
  • NULL returns only the last row in the table.
  • "X" will output the entire last row of each group in column X.
  • "X", "Y" will output the entire last row of each group designated from the X and Y columns.
groupByColumnsColumnName...The column(s) by which to group data.
  • NULL returns only the last row in the table.
  • "X" will output the entire last row of each group in column X.
  • "X", "Y" will output the entire last row of each group designated from the X and Y columns.
groupByColumnsCollection<String>The column(s) by which to group data.
  • NULL returns only the last row in the table.
  • "X" will output the entire last row of each group in column X.
  • "X", "Y" will output the entire last row of each group designated from the X and Y columns.

Returns​

A new table containing the last row for each group.

Examples​

In this example, lastBy returns the last row of the table.

source = newTable(
    stringCol("X", "A", "B", "A", "C", "B", "A", "B", "B", "C"),
    stringCol("Y", "M", "N", "O", "N", "P", "M", "O", "P", "M"),
    intCol("Number", 55, 76, 20, 130, 230, 50, 73, 137, 214),
)

result = source.lastBy()

In this example, lastBy returns the last row, as grouped by X.

source = newTable(
    stringCol("X", "A", "B", "A", "C", "B", "A", "B", "B", "C"),
    stringCol("Y", "M", "N", "O", "N", "P", "M", "O", "P", "M"),
    intCol("Number", 55, 76, 20, 130, 230, 50, 73, 137, 214),
)

result = source.lastBy("X")

In this example, lastBy returns the last row, as grouped by X and Y.

source = newTable(
    stringCol("X", "A", "B", "A", "C", "B", "A", "B", "B", "C"),
    stringCol("Y", "M", "N", "O", "N", "P", "M", "O", "P", "M"),
    intCol("Number", 55, 76, 20, 130, 230, 50, 73, 137, 214),
)

result = source.lastBy("X", "Y")