String

Add String.count/2 to count occurrences of a pattern

Update to Unicode 17.0.0

Inspect special whitespace and zero-width characters using their Unicode representation

Update Unicode to 16.0

Add String.byte_slice/3 to slice a string to a maximum number of bytes while keeping it UTF-8 encoded

Update to Unicode 15.1.0

Add String.replace_invalid/2

Update Unicode to version 15.0.0

Add :fast_ascii mode to String.valid?/2

Fix String.split/3 and String.next_grapheme/1 returning invalid results on invalid UTF-8 encoding

Support empty lookup lists in String.replace/3, String.split/3, and String.splitter/3

Allow slicing with steps in String.slice/2

Add :turkic mode option to String case functions

Update to Unicode 13.0

Update to Unicode 12.1

String.normalize/2 has been deprecated in favor of :unicode.characters_to_nfc_binary/1 or :unicode.characters_to_nfd_binary/1 which ship as part of Erlang/OTP 20+

The :insert_replaced option in String.replace/4 has been deprecated. Instead you may pass a function as a replacement or use :binary.replace/4 if you need to support earlier Elixir versions

Add String.bag_distance/2

Update to Unicode 11

Update to Unicode 10

Allow passing empty string match to String.replace/4

Support context and language sensitive operations in String.upcase/2 and String.downcase/2. Currently only the :greek context is supported

Support :ascii conversion in String.upcase/2 and String.downcase/2

Optimise binary pattern matching in String.split/1 and String.trim_*/1

String.ljust/3 and String.rjust/3 are deprecated in favor of String.pad_leading/3 and String.pad_trailing/3 with a binary padding

String.strip/1 and String.strip/2 are deprecated in favor of String.trim/1 and String.trim/2

String.lstrip/1 and String.rstrip/1 are deprecated in favor of String.trim_leading/1 and String.trim_trailing/1

String.lstrip/2 and String.rstrip/2 are deprecated in favor of String.trim_leading/2 and String.trim_trailing/2 with a binary as second argument

Update to Unicode 9.0.0

Add String.myers_difference/2 for calculating the difference between two strings

The confusing String.strip/2, String.lstrip/2 and String.rstrip/2 API has been soft deprecated in favor of String.trim/2, String.trim_leading/2 and String.trim_trailing/2

The confusing String.ljust/3 and String.rjust/3 API has been soft deprecated in favor of String.pad_leading/3 and String.pad_trailing/3

String.valid_character?/1 is deprecated in favor of String.valid?/1 with pattern matching

Fix bugs in String.replace_* functions where it would not include the accumulated value for certain replacements

Update version of the Unicode database to 8.0.0

Ensure split/1 does not break on non-breakable whitespace

Ensure NFC and NFD normalization pass all of Unicode 8.0.0 tests

Fix incomplete data trimming on both String.replace_trailing and String.rstrip

Attach debug_info back into Unicode modules for Dialyzer support

Introduce String.replace_{prefix,suffix,leading,trailing}/2. The first two will replace only the first occurrence of the given match in string. The last two will replace all occurrences of the given match

Support String.normalize/2 and String.equivalent?/2 that perform NFD and NFC normalization

Support calculation of the jaro distance between strings (usually names) via String.jaro_distance/2. This is used by Mix to support "Did you mean?" feature when a task does not exist

Add String.splitter/3 that splits strings as a stream

Passing an empty string to starts_with?, contains? and ends_with? had dubious behaviour and have been deprecated to help developers identify possible bugs in their source code

Optimize String.rstrip/1

Optimize String.downcase/1

Optimize String.upcase/1

Fix LFCR being treated as a grapheme instead of CRLF

Fix String.replace/4 typespec

String.slice/2 and String.slice/3 have been optimized

\NNN, \NN and \N for octals are deprecated inside string, sigils and chars in favor of hexadecimal entries with \x

Improve performance of String.split/1

Updated Unicode database to 7.0

String.slice/2 and String.slice/3 always returns a list (and never nil)

Add String.chunk/2

String.from_char_data/1 and String.from_char_data!/1 deprecated in favor of List.to_string/1

String.to_char_list/1 (previously deprecated) no longer returns a tuple but the char list only and raises in case of failure

Support :parts in String.split/3

Deprecate :global option in String.split/3 in favor of parts: :infinity

String.to_char_list/1 is deprecated in favor of List.from_char_data/1 (this is a soft deprecation, no warnings will be emitted)

String.from_char_list/1 is deprecated in favor of String.from_char_data/1 (this is a soft deprecation, no warnings will be emitted)

Change String.next_grapheme/1 and String.next_codepoint/1 to return nil on string end

Update to Unicode 6.3.0

Add String.slice/2 with a range

Implement the extended grapheme cluster algorithm for String operations

String.to_integer/1 and String.to_float/1 are deprecated in favor of Integer.parse/1 and Float.parse/1

Fix a bug with String.split/2 when given an empty pattern

String.valid_codepoint?/1 is deprecated in favor of pattern matching with <<_ :: utf8 >>

Add regex pattern support to String.replace/3

Add String.ljust/2, String.rjust/2, String.ljust/3 and String.rjust/3

String.strip/2 now supports removing unicode characters

String.slice/3 still returns the proper result when there is no length to be extracted

Add Regex.scan/3 now supports capturing groups

Add String.reverse/1