package slap

default = "..."

• If Some n, the first n rows and the last n rows of a table are printed. When the number of rows is smaller than 2 * n, all rows are shown.
• If None, all rows of a table are output.

• If Some n, the first n columns and the last n columns of a table are printed. When the number of columns is smaller than 2 * n, all columns are shown.
• If None, all columns of a table are output.

set_dim_defaults opt_n sets both Slap_io.Context.vertical_default and Slap_io.Context.horizontal_default to opt_n.