is-empty for filters

Signature

> is-empty {flags} ...rest

Parameters

• ...rest: the names of the columns to check emptiness

Input/output types:

Examples

Check if a string is empty

>''|is-empty
true

Check if a list is empty

> [] |is-empty
true

Check if more than one column are empty

> [[mealsize]; [arepasmall] [taco'']] |is-emptymealsize
false