String¶
Built-in string class.
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.
Tutorials¶
Constructors¶
String ( ) |
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String ( StringName from ) |
Methods¶
begins_with ( String text ) const |
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bigrams ( ) const |
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bin_to_int ( ) const |
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c_escape ( ) const |
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c_unescape ( ) const |
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capitalize ( ) const |
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casecmp_to ( String to ) const |
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dedent ( ) const |
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get_base_dir ( ) const |
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get_basename ( ) const |
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get_extension ( ) const |
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get_file ( ) const |
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get_slice_count ( String delimiter ) const |
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get_slicec ( int delimiter, int slice ) const |
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hash ( ) const |
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hex_to_int ( ) const |
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humanize_size ( int size ) static |
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is_absolute_path ( ) const |
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is_empty ( ) const |
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is_relative_path ( ) const |
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is_subsequence_of ( String text ) const |
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is_subsequence_ofn ( String text ) const |
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is_valid_filename ( ) const |
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is_valid_float ( ) const |
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is_valid_hex_number ( bool with_prefix=false ) const |
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is_valid_html_color ( ) const |
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is_valid_identifier ( ) const |
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is_valid_int ( ) const |
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is_valid_ip_address ( ) const |
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join ( PackedStringArray parts ) const |
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json_escape ( ) const |
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length ( ) const |
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md5_buffer ( ) const |
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md5_text ( ) const |
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naturalnocasecmp_to ( String to ) const |
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nocasecmp_to ( String to ) const |
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num_int64 ( int number, int base=10, bool capitalize_hex=false ) static |
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num_scientific ( float number ) static |
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num_uint64 ( int number, int base=10, bool capitalize_hex=false ) static |
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pad_decimals ( int digits ) const |
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rsplit ( String delimiter, bool allow_empty=true, int maxsplit=0 ) const |
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sha1_buffer ( ) const |
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sha1_text ( ) const |
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sha256_buffer ( ) const |
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sha256_text ( ) const |
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similarity ( String text ) const |
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simplify_path ( ) const |
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split ( String delimiter, bool allow_empty=true, int maxsplit=0 ) const |
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split_floats ( String delimiter, bool allow_empty=true ) const |
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strip_edges ( bool left=true, bool right=true ) const |
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strip_escapes ( ) const |
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to_ascii_buffer ( ) const |
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to_camel_case ( ) const |
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to_float ( ) const |
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to_int ( ) const |
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to_lower ( ) const |
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to_pascal_case ( ) const |
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to_snake_case ( ) const |
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to_upper ( ) const |
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to_utf16_buffer ( ) const |
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to_utf32_buffer ( ) const |
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to_utf8_buffer ( ) const |
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trim_prefix ( String prefix ) const |
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trim_suffix ( String suffix ) const |
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unicode_at ( int at ) const |
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uri_decode ( ) const |
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uri_encode ( ) const |
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validate_node_name ( ) const |
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xml_escape ( bool escape_quotes=false ) const |
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xml_unescape ( ) const |
Operators¶
operator != ( String right ) |
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operator != ( StringName right ) |
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operator % ( Variant right ) |
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operator + ( String right ) |
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operator + ( int right ) |
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operator < ( String right ) |
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operator <= ( String right ) |
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operator == ( String right ) |
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operator == ( StringName right ) |
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operator > ( String right ) |
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operator >= ( String right ) |
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operator [] ( int index ) |
Constructor Descriptions¶
String String ( )
Constructs an empty String ("").
Constructs a String as a copy of the given String.
Constructs a new String from the given NodePath.
String String ( StringName from )
Constructs a new String from the given StringName.
Method Descriptions¶
Returns true if the string begins with the given string.
PackedStringArray bigrams ( ) const
Returns an array containing the bigrams (pairs of consecutive letters) of this string.
print("Bigrams".bigrams()) # Prints "[Bi, ig, gr, ra, am, ms]"
int bin_to_int ( ) const
Converts a string containing a binary number into an integer. Binary strings can either be prefixed with 0b or not, and they can also start with a - before the optional prefix.
print("0b101".bin_to_int()) # Prints "5".
print("101".bin_to_int()) # Prints "5".
GD.Print("0b101".BinToInt()); // Prints "5".
GD.Print("101".BinToInt()); // Prints "5".
String c_escape ( ) const
Returns a copy of the string with special characters escaped using the C language standard.
String c_unescape ( ) const
Returns a copy of the string with escaped characters replaced by their meanings. Supported escape sequences are \', \", \?, \\, \a, \b, \f, \n, \r, \t, \v.
Note: Unlike the GDScript parser, this method doesn't support the \uXXXX escape sequence.
String capitalize ( ) const
Changes the case of some letters. Replaces underscores with spaces, adds spaces before in-word uppercase characters, converts all letters to lowercase, then capitalizes the first letter and every letter following a space character. For capitalize camelCase mixed_with_underscores, it will return Capitalize Camel Case Mixed With Underscores.
Performs a case-sensitive comparison to another string. Returns -1 if less than, 1 if greater than, or 0 if equal. "less than" or "greater than" are determined by the Unicode code points of each string, which roughly matches the alphabetical order.
Behavior with different string lengths: Returns 1 if the "base" string is longer than the to string or -1 if the "base" string is shorter than the to string. Keep in mind this length is determined by the number of Unicode codepoints, not the actual visible characters.
Behavior with empty strings: Returns -1 if the "base" string is empty, 1 if the to string is empty or 0 if both strings are empty.
To get a boolean result from a string comparison, use the == operator instead. See also nocasecmp_to and naturalnocasecmp_to.
Directly converts an decimal integer to a unicode character. Tables of these characters can be found in various locations, for example here.
print(String.chr(65)) # Prints "A"
print(String.chr(129302)) # Prints "🤖" (robot face emoji)
Returns true if the string contains the given string.
Returns the number of occurrences of substring what between from and to positions. If from and to equals 0 the whole string will be used. If only to equals 0 the remained substring will be used.
Returns the number of occurrences of substring what (ignoring case) between from and to positions. If from and to equals 0 the whole string will be used. If only to equals 0 the remained substring will be used.
String dedent ( ) const
Returns a copy of the string with indentation (leading tabs and spaces) removed. See also indent to add indentation.
Returns true if the string ends with the given string.
Returns the index of the first case-sensitive occurrence of the specified string in this instance, or -1. Optionally, the starting search index can be specified, continuing to the end of the string.
Note: If you just want to know whether a string contains a substring, use the in operator as follows:
print("i" in "team") # Will print `false`.
// C# has no in operator, but we can use `Contains()`.
GD.Print("team".Contains("i")); // Will print `false`.
Returns the index of the first case-insensitive occurrence of the specified string in this instance, or -1. Optionally, the starting search index can be specified, continuing to the end of the string.
Formats the string by replacing all occurrences of placeholder with the elements of values.
values can be a Dictionary or an Array. Any underscores in placeholder will be replaced with the corresponding keys in advance. Array elements use their index as keys.
# Prints: Waiting for Godot is a play by Samuel Beckett, and Godot Engine is named after it.
var use_array_values = "Waiting for {0} is a play by {1}, and {0} Engine is named after it."
print(use_array_values.format(["Godot", "Samuel Beckett"]))
# Prints: User 42 is Godot.
print("User {id} is {name}.".format({"id": 42, "name": "Godot"}))
Some additional handling is performed when values is an array. If placeholder does not contain an underscore, the elements of the array will be used to replace one occurrence of the placeholder in turn; If an array element is another 2-element array, it'll be interpreted as a key-value pair.
# Prints: User 42 is Godot.
print("User {} is {}.".format([42, "Godot"], "{}"))
print("User {id} is {name}.".format([["id", 42], ["name", "Godot"]]))
String get_base_dir ( ) const
If the string is a valid file path, returns the base directory name.
String get_basename ( ) const
If the string is a valid file path, returns the full file path without the extension.
String get_extension ( ) const
Returns the extension without the leading period character (.) if the string is a valid file name or path. If the string does not contain an extension, returns an empty string instead.
print("/path/to/file.txt".get_extension()) # "txt"
print("file.txt".get_extension()) # "txt"
print("file.sample.txt".get_extension()) # "txt"
print(".txt".get_extension()) # "txt"
print("file.txt.".get_extension()) # "" (empty string)
print("file.txt..".get_extension()) # "" (empty string)
print("txt".get_extension()) # "" (empty string)
print("".get_extension()) # "" (empty string)
String get_file ( ) const
If the string is a valid file path, returns the filename.
Splits a string using a delimiter and returns a substring at index slice. Returns an empty string if the index doesn't exist.
This is a more performant alternative to split for cases when you need only one element from the array at a fixed index.
Example:
print("i/am/example/string".get_slice("/", 2)) # Prints 'example'.
Splits a string using a delimiter and returns a number of slices.
Splits a string using a Unicode character with code delimiter and returns a substring at index slice. Returns an empty string if the index doesn't exist.
This is a more performant alternative to split for cases when you need only one element from the array at a fixed index.
int hash ( ) const
Returns the 32-bit hash value representing the string's contents.
Note: Strings with equal content will always produce identical hash values. However, the reverse is not true. Returning identical hash values does not imply the strings are equal, because different strings can have identical hash values due to hash collisions.
int hex_to_int ( ) const
Converts a string containing a hexadecimal number into an integer. Hexadecimal strings can either be prefixed with 0x or not, and they can also start with a - before the optional prefix.
print("0xff".hex_to_int()) # Prints "255".
print("ab".hex_to_int()) # Prints "171".
GD.Print("0xff".HexToInt()); // Prints "255".
GD.Print("ab".HexToInt()); // Prints "171".
Converts an integer representing a number of bytes into a human-readable form.
Note that this output is in IEC prefix format, and includes B, KiB, MiB, GiB, TiB, PiB, and EiB.
Returns a copy of the string with lines indented with prefix.
For example, the string can be indented with two tabs using "\t\t", or four spaces using " ". The prefix can be any string so it can also be used to comment out strings with e.g. "# ". See also dedent to remove indentation.
Note: Empty lines are kept empty.
Returns a copy of the string with the substring what inserted at the given position.
bool is_absolute_path ( ) const
Returns true if the string is a path to a file or directory and its starting point is explicitly defined. This includes res://, user://, C:\, /, etc.
bool is_empty ( ) const
Returns true if the length of the string equals 0.
bool is_relative_path ( ) const
Returns true if the string is a path to a file or directory and its starting point is implicitly defined within the context it is being used. The starting point may refer to the current directory (./), or the current Node.
Returns true if this string is a subsequence of the given string.
Returns true if this string is a subsequence of the given string, without considering case.
bool is_valid_filename ( ) const
Returns true if this string is free from characters that aren't allowed in file names, those being:
: / \ ? * " | % < >
bool is_valid_float ( ) const
Returns true if this string contains a valid float. This is inclusive of integers, and also supports exponents:
print("1.7".is_valid_float()) # Prints "true"
print("24".is_valid_float()) # Prints "true"
print("7e3".is_valid_float()) # Prints "true"
print("Hello".is_valid_float()) # Prints "false"
Returns true if this string contains a valid hexadecimal number. If with_prefix is true, then a validity of the hexadecimal number is determined by 0x prefix, for instance: 0xDEADC0DE.
bool is_valid_html_color ( ) const
Returns true if this string contains a valid color in hexadecimal HTML notation. Other HTML notations such as named colors or hsl() colors aren't considered valid by this method and will return false.
bool is_valid_identifier ( ) const
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.
print("good_ident_1".is_valid_identifier()) # Prints "true"
print("1st_bad_ident".is_valid_identifier()) # Prints "false"
print("bad_ident_#2".is_valid_identifier()) # Prints "false"
bool is_valid_int ( ) const
Returns true if this string contains a valid integer.
print("7".is_valid_int()) # Prints "true"
print("14.6".is_valid_int()) # Prints "false"
print("L".is_valid_int()) # Prints "false"
print("+3".is_valid_int()) # Prints "true"
print("-12".is_valid_int()) # Prints "true"
bool is_valid_ip_address ( ) const
Returns true if this string contains only a well-formatted IPv4 or IPv6 address. This method considers reserved IP addresses such as 0.0.0.0 as valid.
String join ( PackedStringArray parts ) const
Returns a String which is the concatenation of the parts. The separator between elements is the string providing this method.
Example:
print(", ".join(["One", "Two", "Three", "Four"]))
GD.Print(String.Join(",", new string[] {"One", "Two", "Three", "Four"}));
String json_escape ( ) const
Returns a copy of the string with special characters escaped using the JSON standard.
Returns a number of characters from the left of the string. If negative length is used, the characters are counted downwards from String's length.
Examples:
print("sample text".left(3)) #prints "sam"
print("sample text".left(-3)) #prints "sample t"
int length ( ) const
Returns the number of characters in the string.
Formats a string to be at least min_length long by adding characters to the left of the string.
Returns a copy of the string with characters removed from the left. The chars argument is a string specifying the set of characters to be removed.
Note: The chars is not a prefix. See trim_prefix method that will remove a single prefix string rather than a set of characters.
Does a simple case-sensitive expression match, where "*" matches zero or more arbitrary characters and "?" matches any single character except a period ("."). An empty string or empty expression always evaluates to false.
Does a simple case-insensitive expression match, where "*" matches zero or more arbitrary characters and "?" matches any single character except a period ("."). An empty string or empty expression always evaluates to false.
PackedByteArray md5_buffer ( ) const
Returns the MD5 hash of the string as an array of bytes.
String md5_text ( ) const
Returns the MD5 hash of the string as a string.
Performs a case-insensitive natural order comparison to another string. Returns -1 if less than, 1 if greater than, or 0 if equal. "less than" or "greater than" are determined by the Unicode code points of each string, which roughly matches the alphabetical order. Internally, lowercase characters will be converted to uppercase during the comparison.
When used for sorting, natural order comparison will order suites of numbers as expected by most people. If you sort the numbers from 1 to 10 using natural order, you will get [1, 2, 3, ...] instead of [1, 10, 2, 3, ...].
Behavior with different string lengths: Returns 1 if the "base" string is longer than the to string or -1 if the "base" string is shorter than the to string. Keep in mind this length is determined by the number of Unicode codepoints, not the actual visible characters.
Behavior with empty strings: Returns -1 if the "base" string is empty, 1 if the to string is empty or 0 if both strings are empty.
To get a boolean result from a string comparison, use the == operator instead. See also nocasecmp_to and casecmp_to.
Performs a case-insensitive comparison to another string. Returns -1 if less than, 1 if greater than, or 0 if equal. "less than" or "greater than" are determined by the Unicode code points of each string, which roughly matches the alphabetical order. Internally, lowercase characters will be converted to uppercase during the comparison.
Behavior with different string lengths: Returns 1 if the "base" string is longer than the to string or -1 if the "base" string is shorter than the to string. Keep in mind this length is determined by the number of Unicode codepoints, not the actual visible characters.
Behavior with empty strings: Returns -1 if the "base" string is empty, 1 if the to string is empty or 0 if both strings are empty.
To get a boolean result from a string comparison, use the == operator instead. See also casecmp_to and naturalnocasecmp_to.
Converts a float to a string representation of a decimal number.
The number of decimal places can be specified with decimals. If decimals is -1 (default), decimal places will be automatically adjusted so that the string representation has 14 significant digits (counting both digits to the left and the right of the decimal point).
Trailing zeros are not included in the string. The last digit will be rounded and not truncated.
Some examples:
String.num(3.141593) # "3.141593"
String.num(3.141593, 3) # "3.142"
String.num(3.14159300) # "3.141593", no trailing zeros.
# Last digit will be rounded up here, which reduces total digit count since
# trailing zeros are removed:
String.num(42.129999, 5) # "42.13"
# If `decimals` is not specified, the total number of significant digits is 14:
String.num(-0.0000012345432123454321) # "-0.00000123454321"
String.num(-10000.0000012345432123454321) # "-10000.0000012345"
Converts a signed int to a string representation of a number.
Converts a unsigned int to a string representation of a number.
Formats a number to have an exact number of digits after the decimal point.
Formats a number to have an exact number of digits before the decimal point.
If the string is a path, this concatenates file at the end of the string as a subpath. E.g. "this/is".path_join("path") == "this/is/path".
Returns original string repeated a number of times. The number of repetitions is given by the argument.