str capitalize for strings> str capitalize {flags} ...rest
...rest: For a data structure input, convert strings at the given cell paths| input | output | 
|---|---|
| list<string> | list<string> | 
| record | record | 
| string | string | 
| table | table | 
Capitalize contents
>'good day'|str capitalize
Goodday
Capitalize contents
>'anton'|str capitalize
Anton
Capitalize a column in a table
> [[lang, gems]; [nu_test, 100]] |str capitalizelang
╭───┬─────────┬──────╮
│# │  lang   │ gems │
├───┼─────────┼──────┤
│0│Nu_test│100│
╰───┴─────────┴──────╯
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    https://www.nushell.sh/commands/docs/str_capitalize.html