fish-shell/doc_src/cmds/string-split.rst
Aurelio Jargas 0304135d2b
docs: Use \ instead of \\ in examples (#7286)
Instead of informing the bell character (hex 07), the example was using
an escaped \ followed by x07.

    $ echo \\x07
    \x07
    $ echo \x07

    $ echo \x07 | od -a
    0000000 bel  nl
    0000002
    $

* docs: Use \u instead of \\u

Instead of informing the Unicode character 慡, this example was using an
escaped \ followed by u6161.

    $ echo \\u6161
    \u6161
    $ echo \u6161
    慡

Before:

    $ string escape --style=var 'a1 b2'\\u6161 | string unescape --style=var
    a1 b2\u6161

Now:

    $ string escape --style=var 'a1 b2'\u6161 | string unescape --style=var
    a1 b2慡
2020-08-26 18:29:03 +02:00

74 lines
2.3 KiB
ReStructuredText

string-split - split strings by delimiter
=========================================
Synopsis
--------
.. BEGIN 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...]
.. END SYNOPSIS
Description
-----------
.. BEGIN 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 :ref:`read <cmd-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.
.. END DESCRIPTION
Examples
--------
.. BEGIN 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
.. END EXAMPLES