`str substring` for default

Get part of a string. Note that the start is included but the end is excluded, and that the first character of a string is index 0.

Signature

> str substring (range) ...rest --grapheme-clusters --utf-8-bytes

range: the indexes to substring [start end]
...rest: For a data structure input, turn strings at the given cell paths into substrings
--grapheme-clusters (-g): count indexes and split using grapheme clusters (all visible chars have length 1)
--utf-8-bytes (-b): count indexes and split using UTF-8 bytes (default; non-ASCII chars have length 2+)

Get a substring "nushell" from the text "good nushell" using a range

>  'good nushell' | str substring 5..12
nushell

Alternately, you can pass in a list

>  'good nushell' | str substring [5 12]
nushell

Or a simple comma-separated string

>  'good nushell' | str substring '5,12'
nushell

Drop the last n characters from the string

>  'good nushell' | str substring ',-5'
good nu

Get the remaining characters from a starting index

>  'good nushell' | str substring '5,'
nushell

Get the characters from the beginning until ending index

>  'good nushell' | str substring ',7'
good nu

Count indexes and split using grapheme clusters

>  '🇯🇵ほげ ふが ぴよ' | str substring -g 4..6
ふが