Nushell

uniq for filters

Return the distinct values in the input.

Signature

> uniq --count --repeated --ignore-case --unique

Parameters

  • --count (-c): Return a table containing the distinct input values together with their counts
  • --repeated (-d): Return the input values that occur more than once
  • --ignore-case (-i): Compare input values case-insensitively
  • --unique (-u): Return the input values that occur once only

Input/output types:

inputoutput
list<any>list<any>

Examples

Return the distinct values of a list/table (remove duplicates so that each value occurs once only)

> [2 3 3 4] | uniq
╭───┬───╮
│ 0 │ 2 │
│ 1 │ 3 │
│ 2 │ 4 │
╰───┴───╯

Return the input values that occur more than once

> [1 2 2] | uniq -d
╭───┬───╮
│ 0 │ 2 │
╰───┴───╯

Return the input values that occur once only

> [1 2 2] | uniq -u
╭───┬───╮
│ 0 │ 1 │
╰───┴───╯

Ignore differences in case when comparing input values

> ['hello' 'goodbye' 'Hello'] | uniq -i
╭───┬─────────╮
│ 0 │ hello   │
│ 1 │ goodbye │
╰───┴─────────╯

Return a table containing the distinct input values together with their counts

> [1 2 2] | uniq -c
╭───┬───────┬───────╮
│ # │ value │ count │
├───┼───────┼───────┤
│ 0 │     1 │     1 │
│ 1 │     2 │     2 │
╰───┴───────┴───────╯