update for filters

Update an existing column to have a new value.

Signature

> update {flags} (field) (replacement value)

Parameters

  • field: the name of the column to update
  • replacement value: the new value to give the cell(s), or a closure to create the value

Input/output types:

inputoutput
list<any>list<any>
recordrecord
tabletable

Examples

Update a column value

> {'name': 'nu', 'stars': 5} | update name 'Nushell'
╭───────┬─────────╮
 name   Nushell 
 stars  5       
╰───────┴─────────╯

Use in closure form for more involved updating logic

> [[count fruit]; [1 'apple']] | enumerate | update item.count {|e| ($e.item.fruit | str length) + $e.index } | get item
╭───┬───────┬───────╮
 # │ count │ fruit │
├───┼───────┼───────┤
 0      5  apple 
╰───┴───────┴───────╯

Alter each value in the 'authors' column to use a single string instead of a list

> [[project, authors]; ['nu', ['Andrés', 'JT', 'Yehuda']]] | update authors {|row| $row.authors | str join ','}
╭───┬─────────┬──────────────────╮
 # │ project │     authors      │
├───┼─────────┼──────────────────┤
 0  nu       Andrés,JT,Yehuda 
╰───┴─────────┴──────────────────╯

You can also use a simple command to update 'authors' to a single string

> [[project, authors]; ['nu', ['Andrés', 'JT', 'Yehuda']]] | update authors {|| str join ','}
╭───┬─────────┬──────────────────╮
 # │ project │     authors      │
├───┼─────────┼──────────────────┤
 0  nu       Andrés,JT,Yehuda 
╰───┴─────────┴──────────────────╯

Subcommands:

nametypeusage
update cellsBuiltinUpdate the table cells.