godot-docs/classes/class_string.rst

.. Generated automatically by doc/tools/makerst.py in Godot's source tree.
.. DO NOT EDIT THIS FILE, but the String.xml source instead.
.. The source is found in doc/classes or modules/<name>/doc_classes.

.. _class_String:

String
======

**Category:** Built-In Types

Brief Description
-----------------

Built-in string class.

Member Functions
----------------

+------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`bool<class_bool>` from **)**                                                                                    |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`int<class_int>` from **)**                                                                                      |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`float<class_float>` from **)**                                                                                  |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`Vector2<class_vector2>` from **)**                                                                              |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`Rect2<class_rect2>` from **)**                                                                                  |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`Vector3<class_vector3>` from **)**                                                                              |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`Transform2D<class_transform2d>` from **)**                                                                      |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`Plane<class_plane>` from **)**                                                                                  |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`Quat<class_quat>` from **)**                                                                                    |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`AABB<class_aabb>` from **)**                                                                                    |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`Basis<class_basis>` from **)**                                                                                  |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`Transform<class_transform>` from **)**                                                                          |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`Color<class_color>` from **)**                                                                                  |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`NodePath<class_nodepath>` from **)**                                                                            |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`RID<class_rid>` from **)**                                                                                      |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`Dictionary<class_dictionary>` from **)**                                                                        |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`Array<class_array>` from **)**                                                                                  |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`PoolByteArray<class_poolbytearray>` from **)**                                                                  |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`PoolIntArray<class_poolintarray>` from **)**                                                                    |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`PoolRealArray<class_poolrealarray>` from **)**                                                                  |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`PoolStringArray<class_poolstringarray>` from **)**                                                              |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`PoolVector2Array<class_poolvector2array>` from **)**                                                            |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`PoolVector3Array<class_poolvector3array>` from **)**                                                            |
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| :ref:`String<class_string>`                    | :ref:`String<class_String_String>` **(** :ref:`PoolColorArray<class_poolcolorarray>` from **)**                                                                |
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| :ref:`bool<class_bool>`                        | :ref:`begins_with<class_String_begins_with>` **(** :ref:`String<class_string>` text **)**                                                                      |
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| :ref:`PoolStringArray<class_poolstringarray>`  | :ref:`bigrams<class_String_bigrams>` **(** **)**                                                                                                               |
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| :ref:`String<class_string>`                    | :ref:`c_escape<class_String_c_escape>` **(** **)**                                                                                                             |
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| :ref:`String<class_string>`                    | :ref:`c_unescape<class_String_c_unescape>` **(** **)**                                                                                                         |
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| :ref:`String<class_string>`                    | :ref:`capitalize<class_String_capitalize>` **(** **)**                                                                                                         |
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| :ref:`int<class_int>`                          | :ref:`casecmp_to<class_String_casecmp_to>` **(** :ref:`String<class_string>` to **)**                                                                          |
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| :ref:`String<class_string>`                    | :ref:`dedent<class_String_dedent>` **(** **)**                                                                                                                 |
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| :ref:`bool<class_bool>`                        | :ref:`empty<class_String_empty>` **(** **)**                                                                                                                   |
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| :ref:`bool<class_bool>`                        | :ref:`ends_with<class_String_ends_with>` **(** :ref:`String<class_string>` text **)**                                                                          |
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| void                                           | :ref:`erase<class_String_erase>` **(** :ref:`int<class_int>` position, :ref:`int<class_int>` chars **)**                                                       |
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| :ref:`int<class_int>`                          | :ref:`find<class_String_find>` **(** :ref:`String<class_string>` what, :ref:`int<class_int>` from=0 **)**                                                      |
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| :ref:`int<class_int>`                          | :ref:`find_last<class_String_find_last>` **(** :ref:`String<class_string>` what **)**                                                                          |
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| :ref:`int<class_int>`                          | :ref:`findn<class_String_findn>` **(** :ref:`String<class_string>` what, :ref:`int<class_int>` from=0 **)**                                                    |
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| :ref:`String<class_string>`                    | :ref:`format<class_String_format>` **(** var values, :ref:`String<class_string>` placeholder={_} **)**                                                         |
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| :ref:`String<class_string>`                    | :ref:`get_base_dir<class_String_get_base_dir>` **(** **)**                                                                                                     |
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| :ref:`String<class_string>`                    | :ref:`get_basename<class_String_get_basename>` **(** **)**                                                                                                     |
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| :ref:`String<class_string>`                    | :ref:`get_extension<class_String_get_extension>` **(** **)**                                                                                                   |
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| :ref:`String<class_string>`                    | :ref:`get_file<class_String_get_file>` **(** **)**                                                                                                             |
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| :ref:`int<class_int>`                          | :ref:`hash<class_String_hash>` **(** **)**                                                                                                                     |
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| :ref:`int<class_int>`                          | :ref:`hex_to_int<class_String_hex_to_int>` **(** **)**                                                                                                         |
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| :ref:`String<class_string>`                    | :ref:`insert<class_String_insert>` **(** :ref:`int<class_int>` position, :ref:`String<class_string>` what **)**                                                |
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| :ref:`bool<class_bool>`                        | :ref:`is_abs_path<class_String_is_abs_path>` **(** **)**                                                                                                       |
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| :ref:`bool<class_bool>`                        | :ref:`is_rel_path<class_String_is_rel_path>` **(** **)**                                                                                                       |
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| :ref:`bool<class_bool>`                        | :ref:`is_subsequence_of<class_String_is_subsequence_of>` **(** :ref:`String<class_string>` text **)**                                                          |
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| :ref:`bool<class_bool>`                        | :ref:`is_subsequence_ofi<class_String_is_subsequence_ofi>` **(** :ref:`String<class_string>` text **)**                                                        |
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| :ref:`bool<class_bool>`                        | :ref:`is_valid_float<class_String_is_valid_float>` **(** **)**                                                                                                 |
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| :ref:`bool<class_bool>`                        | :ref:`is_valid_html_color<class_String_is_valid_html_color>` **(** **)**                                                                                       |
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| :ref:`bool<class_bool>`                        | :ref:`is_valid_identifier<class_String_is_valid_identifier>` **(** **)**                                                                                       |
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| :ref:`bool<class_bool>`                        | :ref:`is_valid_integer<class_String_is_valid_integer>` **(** **)**                                                                                             |
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| :ref:`bool<class_bool>`                        | :ref:`is_valid_ip_address<class_String_is_valid_ip_address>` **(** **)**                                                                                       |
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| :ref:`String<class_string>`                    | :ref:`json_escape<class_String_json_escape>` **(** **)**                                                                                                       |
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| :ref:`String<class_string>`                    | :ref:`left<class_String_left>` **(** :ref:`int<class_int>` position **)**                                                                                      |
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| :ref:`int<class_int>`                          | :ref:`length<class_String_length>` **(** **)**                                                                                                                 |
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| :ref:`String<class_string>`                    | :ref:`lstrip<class_String_lstrip>` **(** :ref:`String<class_string>` chars **)**                                                                               |
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| :ref:`bool<class_bool>`                        | :ref:`match<class_String_match>` **(** :ref:`String<class_string>` expr **)**                                                                                  |
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| :ref:`bool<class_bool>`                        | :ref:`matchn<class_String_matchn>` **(** :ref:`String<class_string>` expr **)**                                                                                |
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| :ref:`PoolByteArray<class_poolbytearray>`      | :ref:`md5_buffer<class_String_md5_buffer>` **(** **)**                                                                                                         |
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| :ref:`String<class_string>`                    | :ref:`md5_text<class_String_md5_text>` **(** **)**                                                                                                             |
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| :ref:`int<class_int>`                          | :ref:`nocasecmp_to<class_String_nocasecmp_to>` **(** :ref:`String<class_string>` to **)**                                                                      |
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| :ref:`int<class_int>`                          | :ref:`ord_at<class_String_ord_at>` **(** :ref:`int<class_int>` at **)**                                                                                        |
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| :ref:`String<class_string>`                    | :ref:`pad_decimals<class_String_pad_decimals>` **(** :ref:`int<class_int>` digits **)**                                                                        |
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| :ref:`String<class_string>`                    | :ref:`pad_zeros<class_String_pad_zeros>` **(** :ref:`int<class_int>` digits **)**                                                                              |
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| :ref:`String<class_string>`                    | :ref:`percent_decode<class_String_percent_decode>` **(** **)**                                                                                                 |
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| :ref:`String<class_string>`                    | :ref:`percent_encode<class_String_percent_encode>` **(** **)**                                                                                                 |
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| :ref:`String<class_string>`                    | :ref:`plus_file<class_String_plus_file>` **(** :ref:`String<class_string>` file **)**                                                                          |
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| :ref:`String<class_string>`                    | :ref:`replace<class_String_replace>` **(** :ref:`String<class_string>` what, :ref:`String<class_string>` forwhat **)**                                         |
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| :ref:`String<class_string>`                    | :ref:`replacen<class_String_replacen>` **(** :ref:`String<class_string>` what, :ref:`String<class_string>` forwhat **)**                                       |
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| :ref:`int<class_int>`                          | :ref:`rfind<class_String_rfind>` **(** :ref:`String<class_string>` what, :ref:`int<class_int>` from=-1 **)**                                                   |
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| :ref:`int<class_int>`                          | :ref:`rfindn<class_String_rfindn>` **(** :ref:`String<class_string>` what, :ref:`int<class_int>` from=-1 **)**                                                 |
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| :ref:`String<class_string>`                    | :ref:`right<class_String_right>` **(** :ref:`int<class_int>` position **)**                                                                                    |
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| :ref:`PoolStringArray<class_poolstringarray>`  | :ref:`rsplit<class_String_rsplit>` **(** :ref:`String<class_string>` divisor, :ref:`bool<class_bool>` allow_empty=True, :ref:`int<class_int>` maxsplit=0 **)** |
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| :ref:`String<class_string>`                    | :ref:`rstrip<class_String_rstrip>` **(** :ref:`String<class_string>` chars **)**                                                                               |
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| :ref:`PoolByteArray<class_poolbytearray>`      | :ref:`sha256_buffer<class_String_sha256_buffer>` **(** **)**                                                                                                   |
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| :ref:`String<class_string>`                    | :ref:`sha256_text<class_String_sha256_text>` **(** **)**                                                                                                       |
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| :ref:`float<class_float>`                      | :ref:`similarity<class_String_similarity>` **(** :ref:`String<class_string>` text **)**                                                                        |
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| :ref:`PoolStringArray<class_poolstringarray>`  | :ref:`split<class_String_split>` **(** :ref:`String<class_string>` divisor, :ref:`bool<class_bool>` allow_empty=True, :ref:`int<class_int>` maxsplit=0 **)**   |
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| :ref:`PoolRealArray<class_poolrealarray>`      | :ref:`split_floats<class_String_split_floats>` **(** :ref:`String<class_string>` divisor, :ref:`bool<class_bool>` allow_empty=True **)**                       |
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| :ref:`String<class_string>`                    | :ref:`strip_edges<class_String_strip_edges>` **(** :ref:`bool<class_bool>` left=True, :ref:`bool<class_bool>` right=True **)**                                 |
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| :ref:`String<class_string>`                    | :ref:`substr<class_String_substr>` **(** :ref:`int<class_int>` from, :ref:`int<class_int>` len **)**                                                           |
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| :ref:`PoolByteArray<class_poolbytearray>`      | :ref:`to_ascii<class_String_to_ascii>` **(** **)**                                                                                                             |
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| :ref:`float<class_float>`                      | :ref:`to_float<class_String_to_float>` **(** **)**                                                                                                             |
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| :ref:`int<class_int>`                          | :ref:`to_int<class_String_to_int>` **(** **)**                                                                                                                 |
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| :ref:`String<class_string>`                    | :ref:`to_lower<class_String_to_lower>` **(** **)**                                                                                                             |
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| :ref:`String<class_string>`                    | :ref:`to_upper<class_String_to_upper>` **(** **)**                                                                                                             |
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| :ref:`PoolByteArray<class_poolbytearray>`      | :ref:`to_utf8<class_String_to_utf8>` **(** **)**                                                                                                               |
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| :ref:`String<class_string>`                    | :ref:`trim_prefix<class_String_trim_prefix>` **(** :ref:`String<class_string>` prefix **)**                                                                    |
+------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`String<class_string>`                    | :ref:`trim_suffix<class_String_trim_suffix>` **(** :ref:`String<class_string>` suffix **)**                                                                    |
+------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`String<class_string>`                    | :ref:`xml_escape<class_String_xml_escape>` **(** **)**                                                                                                         |
+------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`String<class_string>`                    | :ref:`xml_unescape<class_String_xml_unescape>` **(** **)**                                                                                                     |
+------------------------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------+

Description
-----------

This is the built-in string class (and the one used by GDScript). It supports Unicode and provides all necessary means for string handling. Strings are reference counted and use a copy-on-write approach, so passing them around is cheap in resources.

Member Function Description
---------------------------

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`bool<class_bool>` from **)**

Constructs a new String from the given :ref:`bool<class_bool>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`int<class_int>` from **)**

Constructs a new String from the given :ref:`int<class_int>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`float<class_float>` from **)**

Constructs a new String from the given :ref:`float<class_float>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`Vector2<class_vector2>` from **)**

Constructs a new String from the given :ref:`Vector2<class_vector2>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`Rect2<class_rect2>` from **)**

Constructs a new String from the given :ref:`Rect2<class_rect2>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`Vector3<class_vector3>` from **)**

Constructs a new String from the given :ref:`Vector3<class_vector3>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`Transform2D<class_transform2d>` from **)**

Constructs a new String from the given :ref:`Transform2D<class_transform2d>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`Plane<class_plane>` from **)**

Constructs a new String from the given :ref:`Plane<class_plane>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`Quat<class_quat>` from **)**

Constructs a new String from the given :ref:`Quat<class_quat>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`AABB<class_aabb>` from **)**

Constructs a new String from the given :ref:`AABB<class_aabb>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`Basis<class_basis>` from **)**

Constructs a new String from the given :ref:`Basis<class_basis>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`Transform<class_transform>` from **)**

Constructs a new String from the given :ref:`Transform<class_transform>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`Color<class_color>` from **)**

Constructs a new String from the given :ref:`Color<class_color>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`NodePath<class_nodepath>` from **)**

Constructs a new String from the given :ref:`NodePath<class_nodepath>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`RID<class_rid>` from **)**

Constructs a new String from the given :ref:`RID<class_rid>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`Dictionary<class_dictionary>` from **)**

Constructs a new String from the given :ref:`Dictionary<class_dictionary>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`Array<class_array>` from **)**

Constructs a new String from the given :ref:`Array<class_array>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`PoolByteArray<class_poolbytearray>` from **)**

Constructs a new String from the given :ref:`PoolByteArray<class_poolbytearray>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`PoolIntArray<class_poolintarray>` from **)**

Constructs a new String from the given :ref:`PoolIntArray<class_poolintarray>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`PoolRealArray<class_poolrealarray>` from **)**

Constructs a new String from the given :ref:`PoolRealArray<class_poolrealarray>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`PoolStringArray<class_poolstringarray>` from **)**

Constructs a new String from the given :ref:`PoolStringArray<class_poolstringarray>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`PoolVector2Array<class_poolvector2array>` from **)**

Constructs a new String from the given :ref:`PoolVector2Array<class_poolvector2array>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`PoolVector3Array<class_poolvector3array>` from **)**

Constructs a new String from the given :ref:`PoolVector3Array<class_poolvector3array>`.

.. _class_String_String:

- :ref:`String<class_string>` **String** **(** :ref:`PoolColorArray<class_poolcolorarray>` from **)**

Constructs a new String from the given :ref:`PoolColorArray<class_poolcolorarray>`.

.. _class_String_begins_with:

- :ref:`bool<class_bool>` **begins_with** **(** :ref:`String<class_string>` text **)**

Returns ``true`` if the string begins with the given string.

.. _class_String_bigrams:

- :ref:`PoolStringArray<class_poolstringarray>` **bigrams** **(** **)**

Returns the bigrams (pairs of consecutive letters) of this string.

.. _class_String_c_escape:

- :ref:`String<class_string>` **c_escape** **(** **)**

Returns a copy of the string with special characters escaped using the C language standard.

.. _class_String_c_unescape:

- :ref:`String<class_string>` **c_unescape** **(** **)**

Returns a copy of the string with escaped characters replaced by their meanings according to the C language standard.

.. _class_String_capitalize:

- :ref:`String<class_string>` **capitalize** **(** **)**

Changes the case of some letters. Replaces underscores with spaces, converts all letters to lowercase, then capitalizes first and every letter following the space character. For ``capitalize camelCase mixed_with_underscores`` it will return ``Capitalize Camelcase Mixed With Underscores``.

.. _class_String_casecmp_to:

- :ref:`int<class_int>` **casecmp_to** **(** :ref:`String<class_string>` to **)**

Performs a case-sensitive comparison to another string. Returns ``-1`` if less than, ``+1`` if greater than, or ``0`` if equal.

.. _class_String_dedent:

- :ref:`String<class_string>` **dedent** **(** **)**

Removes indentation from string.

.. _class_String_empty:

- :ref:`bool<class_bool>` **empty** **(** **)**

Returns ``true`` if the string is empty.

.. _class_String_ends_with:

- :ref:`bool<class_bool>` **ends_with** **(** :ref:`String<class_string>` text **)**

Returns ``true`` if the string ends with the given string.

.. _class_String_erase:

- void **erase** **(** :ref:`int<class_int>` position, :ref:`int<class_int>` chars **)**

Erases ``chars`` characters from the string starting from ``position``.

.. _class_String_find:

- :ref:`int<class_int>` **find** **(** :ref:`String<class_string>` what, :ref:`int<class_int>` from=0 **)**

Finds the first occurrence of a substring. Returns the starting position of the substring or -1 if not found. Optionally, the initial search index can be passed.

.. _class_String_find_last:

- :ref:`int<class_int>` **find_last** **(** :ref:`String<class_string>` what **)**

Finds the last occurrence of a substring. Returns the starting position of the substring or -1 if not found.

.. _class_String_findn:

- :ref:`int<class_int>` **findn** **(** :ref:`String<class_string>` what, :ref:`int<class_int>` from=0 **)**

Finds the first occurrence of a substring, ignoring case. Returns the starting position of the substring or -1 if not found. Optionally, the initial search index can be passed.

.. _class_String_format:

- :ref:`String<class_string>` **format** **(** var values, :ref:`String<class_string>` placeholder={_} **)**

Formats the string by replacing all occurrences of ``placeholder`` with ``values``.

.. _class_String_get_base_dir:

- :ref:`String<class_string>` **get_base_dir** **(** **)**

If the string is a valid file path, returns the base directory name.

.. _class_String_get_basename:

- :ref:`String<class_string>` **get_basename** **(** **)**

If the string is a valid file path, returns the full file path without the extension.

.. _class_String_get_extension:

- :ref:`String<class_string>` **get_extension** **(** **)**

If the string is a valid file path, returns the extension.

.. _class_String_get_file:

- :ref:`String<class_string>` **get_file** **(** **)**

If the string is a valid file path, returns the filename.

.. _class_String_hash:

- :ref:`int<class_int>` **hash** **(** **)**

Hashes the string and returns a 32-bit integer.

.. _class_String_hex_to_int:

- :ref:`int<class_int>` **hex_to_int** **(** **)**

Converts a string containing a hexadecimal number into an integer.

.. _class_String_insert:

- :ref:`String<class_string>` **insert** **(** :ref:`int<class_int>` position, :ref:`String<class_string>` what **)**

Inserts a substring at a given position.

.. _class_String_is_abs_path:

- :ref:`bool<class_bool>` **is_abs_path** **(** **)**

If the string is a path to a file or directory, returns ``true`` if the path is absolute.

.. _class_String_is_rel_path:

- :ref:`bool<class_bool>` **is_rel_path** **(** **)**

If the string is a path to a file or directory, returns ``true`` if the path is relative.

.. _class_String_is_subsequence_of:

- :ref:`bool<class_bool>` **is_subsequence_of** **(** :ref:`String<class_string>` text **)**

Returns ``true`` if this string is a subsequence of the given string.

.. _class_String_is_subsequence_ofi:

- :ref:`bool<class_bool>` **is_subsequence_ofi** **(** :ref:`String<class_string>` text **)**

Returns ``true`` if this string is a subsequence of the given string, without considering case.

.. _class_String_is_valid_float:

- :ref:`bool<class_bool>` **is_valid_float** **(** **)**

Returns ``true`` if this string contains a valid float.

.. _class_String_is_valid_html_color:

- :ref:`bool<class_bool>` **is_valid_html_color** **(** **)**

Returns ``true`` if this string contains a valid color in HTML notation.

.. _class_String_is_valid_identifier:

- :ref:`bool<class_bool>` **is_valid_identifier** **(** **)**

Returns ``true`` if this string is a valid identifier. A valid identifier may contain only letters, digits and underscores (\_) and the first character may not be a digit.

.. _class_String_is_valid_integer:

- :ref:`bool<class_bool>` **is_valid_integer** **(** **)**

Returns ``true`` if this string contains a valid integer.

.. _class_String_is_valid_ip_address:

- :ref:`bool<class_bool>` **is_valid_ip_address** **(** **)**

Returns ``true`` if this string contains a valid IP address.

.. _class_String_json_escape:

- :ref:`String<class_string>` **json_escape** **(** **)**

Returns a copy of the string with special characters escaped using the JSON standard.

.. _class_String_left:

- :ref:`String<class_string>` **left** **(** :ref:`int<class_int>` position **)**

Returns a number of characters from the left of the string.

.. _class_String_length:

- :ref:`int<class_int>` **length** **(** **)**

Returns the string's amount of characters.

.. _class_String_lstrip:

- :ref:`String<class_string>` **lstrip** **(** :ref:`String<class_string>` chars **)**

Returns a copy of the string with characters removed from the left.

.. _class_String_match:

- :ref:`bool<class_bool>` **match** **(** :ref:`String<class_string>` expr **)**

Does a simple expression match, where '\*' matches zero or more arbitrary characters and '?' matches any single character except '.'.

.. _class_String_matchn:

- :ref:`bool<class_bool>` **matchn** **(** :ref:`String<class_string>` expr **)**

Does a simple case insensitive expression match, using ? and \* wildcards (see :ref:`match<class_String_match>`).

.. _class_String_md5_buffer:

- :ref:`PoolByteArray<class_poolbytearray>` **md5_buffer** **(** **)**

Returns the MD5 hash of the string as an array of bytes.

.. _class_String_md5_text:

- :ref:`String<class_string>` **md5_text** **(** **)**

Returns the MD5 hash of the string as a string.

.. _class_String_nocasecmp_to:

- :ref:`int<class_int>` **nocasecmp_to** **(** :ref:`String<class_string>` to **)**

Performs a case-insensitive comparison to another string. Returns ``-1`` if less than, ``+1`` if greater than, or ``0`` if equal.

.. _class_String_ord_at:

- :ref:`int<class_int>` **ord_at** **(** :ref:`int<class_int>` at **)**

Returns the character code at position ``at``.

.. _class_String_pad_decimals:

- :ref:`String<class_string>` **pad_decimals** **(** :ref:`int<class_int>` digits **)**

Formats a number to have an exact number of ``digits`` after the decimal point.

.. _class_String_pad_zeros:

- :ref:`String<class_string>` **pad_zeros** **(** :ref:`int<class_int>` digits **)**

Formats a number to have an exact number of ``digits`` before the decimal point.

.. _class_String_percent_decode:

- :ref:`String<class_string>` **percent_decode** **(** **)**

Decode a percent-encoded string. See :ref:`percent_encode<class_String_percent_encode>`.

.. _class_String_percent_encode:

- :ref:`String<class_string>` **percent_encode** **(** **)**

Percent-encodes a string. Encodes parameters in a URL when sending a HTTP GET request (and bodies of form-urlencoded POST requests).

.. _class_String_plus_file:

- :ref:`String<class_string>` **plus_file** **(** :ref:`String<class_string>` file **)**

If the string is a path, this concatenates ``file`` at the end of the string as a subpath. E.g. ``"this/is".plus_file("path") == "this/is/path"``.

.. _class_String_replace:

- :ref:`String<class_string>` **replace** **(** :ref:`String<class_string>` what, :ref:`String<class_string>` forwhat **)**

Replaces occurrences of a substring with the given one inside the string.

.. _class_String_replacen:

- :ref:`String<class_string>` **replacen** **(** :ref:`String<class_string>` what, :ref:`String<class_string>` forwhat **)**

Replaces occurrences of a substring with the given one inside the string. Ignores case.

.. _class_String_rfind:

- :ref:`int<class_int>` **rfind** **(** :ref:`String<class_string>` what, :ref:`int<class_int>` from=-1 **)**

Performs a search for a substring, but starts from the end of the string instead of the beginning.

.. _class_String_rfindn:

- :ref:`int<class_int>` **rfindn** **(** :ref:`String<class_string>` what, :ref:`int<class_int>` from=-1 **)**

Performs a search for a substring, but starts from the end of the string instead of the beginning. Ignores case.

.. _class_String_right:

- :ref:`String<class_string>` **right** **(** :ref:`int<class_int>` position **)**

Returns the right side of the string from a given position.

.. _class_String_rsplit:

- :ref:`PoolStringArray<class_poolstringarray>` **rsplit** **(** :ref:`String<class_string>` divisor, :ref:`bool<class_bool>` allow_empty=True, :ref:`int<class_int>` maxsplit=0 **)**

Splits the string by a ``divisor`` string and returns an array of the substrings, starting from right. Example "One,Two,Three" will return "One","Two","Three" if split by ",".

If ``maxsplit`` is specified, then it is number of splits to do, default is 0 which splits all the items.

.. _class_String_rstrip:

- :ref:`String<class_string>` **rstrip** **(** :ref:`String<class_string>` chars **)**

Returns a copy of the string with characters removed from the right.

.. _class_String_sha256_buffer:

- :ref:`PoolByteArray<class_poolbytearray>` **sha256_buffer** **(** **)**

.. _class_String_sha256_text:

- :ref:`String<class_string>` **sha256_text** **(** **)**

Returns the SHA-256 hash of the string as a string.

.. _class_String_similarity:

- :ref:`float<class_float>` **similarity** **(** :ref:`String<class_string>` text **)**

Returns the similarity index of the text compared to this string. 1 means totally similar and 0 means totally dissimilar.

.. _class_String_split:

- :ref:`PoolStringArray<class_poolstringarray>` **split** **(** :ref:`String<class_string>` divisor, :ref:`bool<class_bool>` allow_empty=True, :ref:`int<class_int>` maxsplit=0 **)**

Splits the string by a divisor string and returns an array of the substrings. Example "One,Two,Three" will return "One","Two","Three" if split by ",".

If ``maxsplit`` is given, at most maxsplit number of splits occur, and the remainder of the string is returned as the final element of the list (thus, the list will have at most maxsplit+1 elements)

.. _class_String_split_floats:

- :ref:`PoolRealArray<class_poolrealarray>` **split_floats** **(** :ref:`String<class_string>` divisor, :ref:`bool<class_bool>` allow_empty=True **)**

Splits the string in floats by using a divisor string and returns an array of the substrings. Example "1,2.5,3" will return 1,2.5,3 if split by ",".

.. _class_String_strip_edges:

- :ref:`String<class_string>` **strip_edges** **(** :ref:`bool<class_bool>` left=True, :ref:`bool<class_bool>` right=True **)**

Returns a copy of the string stripped of any non-printable character at the beginning and the end. The optional arguments are used to toggle stripping on the left and right edges respectively.

.. _class_String_substr:

- :ref:`String<class_string>` **substr** **(** :ref:`int<class_int>` from, :ref:`int<class_int>` len **)**

Returns part of the string from the position ``from`` with length ``len``.

.. _class_String_to_ascii:

- :ref:`PoolByteArray<class_poolbytearray>` **to_ascii** **(** **)**

Converts the String (which is a character array) to :ref:`PoolByteArray<class_poolbytearray>` (which is an array of bytes). The conversion is sped up in comparison to to_utf8() with the assumption that all the characters the String contains are only ASCII characters.

.. _class_String_to_float:

- :ref:`float<class_float>` **to_float** **(** **)**

Converts a string containing a decimal number into a ``float``.

.. _class_String_to_int:

- :ref:`int<class_int>` **to_int** **(** **)**

Converts a string containing an integer number into an ``int``.

.. _class_String_to_lower:

- :ref:`String<class_string>` **to_lower** **(** **)**

Returns the string converted to lowercase.

.. _class_String_to_upper:

- :ref:`String<class_string>` **to_upper** **(** **)**

Returns the string converted to uppercase.

.. _class_String_to_utf8:

- :ref:`PoolByteArray<class_poolbytearray>` **to_utf8** **(** **)**

Converts the String (which is an array of characters) to :ref:`PoolByteArray<class_poolbytearray>` (which is an array of bytes). The conversion is a bit slower than to_ascii(), but supports all UTF-8 characters. Therefore, you should prefer this function over to_ascii().

.. _class_String_trim_prefix:

- :ref:`String<class_string>` **trim_prefix** **(** :ref:`String<class_string>` prefix **)**

Removes a given string from the start if it starts with it or leaves the string unchanged.

.. _class_String_trim_suffix:

- :ref:`String<class_string>` **trim_suffix** **(** :ref:`String<class_string>` suffix **)**

Removes a given string from the end if it ends with it or leaves the string unchanged.

.. _class_String_xml_escape:

- :ref:`String<class_string>` **xml_escape** **(** **)**

Returns a copy of the string with special characters escaped using the XML standard.

.. _class_String_xml_unescape:

- :ref:`String<class_string>` **xml_unescape** **(** **)**

Returns a copy of the string with escaped characters replaced by their meanings according to the XML standard.