drop for filters

Remove items/rows from the end of the input list/table. Counterpart of `skip`. Opposite of `last`.

Signature

> drop {flags} (rows)

Parameters

  • rows: The number of items to remove.

Input/output types:

inputoutput
list<any>list<any>
tabletable

Examples

Remove the last item of a list

> [0,1,2,3] | drop
╭───┬───╮
 0  0 
 1  1 
 2  2 
╰───┴───╯

Remove zero item of a list

> [0,1,2,3] | drop 0
╭───┬───╮
 0  0 
 1  1 
 2  2 
 3  3 
╰───┴───╯

Remove the last two items of a list

> [0,1,2,3] | drop 2
╭───┬───╮
 0  0 
 1  1 
╰───┴───╯

Remove the last row in a table

> [[a, b]; [1, 2] [3, 4]] | drop 1
╭───┬───┬───╮
 # │ a │ b │
├───┼───┼───┤
 0  1  2 
╰───┴───┴───╯

Subcommands:

nametypeusage
drop columnBuiltinRemove N columns at the right-hand end of the input table. To remove columns by name, use reject.
drop nthBuiltinDrop the selected rows.