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/Nushell

`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:

input	output
list<any>	list<any>
record	record
table	table

Examples

Update a column value

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

Use in closure form for more involved updating logic

> [[countfruit]; [1'apple']] |enumerate|updateitem.count {|e| ($e.item.fruit|str length) +$e.index } |getitem
╭───┬───────┬───────╮
│# │ 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']]] |updateauthors {|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']]] |updateauthors {|| str join','}
╭───┬─────────┬──────────────────╮
│# │ project │     authors      │
├───┼─────────┼──────────────────┤
│0│nu│Andrés,JT,Yehuda│
╰───┴─────────┴──────────────────╯

Subcommands: