filter for filters

Filter values based on a predicate closure.

Signature

> filter (closure)

Parameters

• closure: Predicate closure

Notes

This command works similar to 'where' but allows reading the predicate closure from a variable. On the other hand, the "row condition" syntax is not supported.

Examples

Filter items of a list according to a condition

> [1 2] | filter {|x| $x > 1}
╭───┬───╮
│ 0 │ 2 │
╰───┴───╯

Filter rows of a table according to a condition

> [{a: 1} {a: 2}] | filter {|x| $x.a > 1}
╭───┬───╮
│ # │ a │
├───┼───┤
│ 0 │ 2 │
╰───┴───╯

Filter rows of a table according to a stored condition

> let cond = {|x| $x.a > 1}; [{a: 1} {a: 2}] | filter $cond
╭───┬───╮
│ # │ a │
├───┼───┤
│ 0 │ 2 │
╰───┴───╯