# string-split0 - split on zero bytes

## Synopsis

    string split [(-f | --fields) FIELDS] [(-m | --max) MAX] [(-n | --no-empty)] [(-q | --quiet)] [(-r | --right)] SEP [STRING...]
    string split0 [(-f | --fields) FIELDS] [(-m | --max) MAX] [(-n | --no-empty)] [(-q | --quiet)] [(-r | --right)] [STRING...]

## Description

`string split` splits each STRING on the separator SEP, which can be an empty string. If `-m` or `--max` is specified, at most MAX splits are done on each STRING. If `-r` or `--right` is given, splitting is performed right-to-left. This is useful in combination with `-m` or `--max`. With `-n` or `--no-empty`, empty results are excluded from consideration (e.g. `hello\n\nworld` would expand to two strings and not three). Exit status: 0 if at least one split was performed, or 1 otherwise.

Use `-f` or `--fields` to print out specific fields. Unless `--allow-empty` is used, if a given field does not exist, then the command exits with status 1 and does not print anything.

See also the `--delimiter` option of the read command.

`string split0` splits each STRING on the zero byte (NUL). Options are the same as `string split` except that no separator is given.

`split0` has the important property that its output is not further split when used in a command substitution, allowing for the command substitution to produce elements containing newlines. This is most useful when used with Unix tools that produce zero bytes, such as `find -print0` or `sort -z`. See split0 examples below.

## Examples

    >_ string split . example.com
    example
    com

    >_ string split -r -m1 / /usr/local/bin/fish
    /usr/local/bin
    fish

    >_ string split '' abc
    a
    b
    c

    >_ string split --allow-empty -f1,3,5 '' abc
    a
    c

### NUL Delimited Examples

    >_ # Count files in a directory, without being confused by newlines.
    >_ count (find . -print0 | string split0)
    42

    >_ # Sort a list of elements which may contain newlines
    >_ set foo beta alpha\ngamma
    >_ set foo (string join0 $foo | sort -z | string split0)
    >_ string escape $foo[1]
    alpha\ngamma