The table summarizes the string functions available in APL.
| Name | Description |
|---|---|
| base64_decode_toarray | Decodes a Base64-encoded string into an array of bytes. |
| base64_decode_tostring | Decodes a base64 string to a UTF-8 string. |
| base64_encode_fromarray | Converts a sequence of bytes into a Base64-encoded string. |
| base64_encode_tostring | Encodes a string as base64 string. |
| coalesce | Evaluates a list of expressions and returns the first non-null (or non-empty for string) expression. |
| countof_regex | Counts occurrences of a substring in a string. Regex matches don’t. |
| countof | Counts occurrences of a substring in a string. |
| extract_all | Gets all matches for a regular expression from a text string. |
| extract | Gets a match for a regular expression from a text string. |
| format_bytes | Formats a number of bytes as a string including bytes units |
| format_url | Formats an input string into a valid URL by adding the necessary protocol if it’s escaping illegal URL characters. |
| gettype | Returns the runtime type of its single argument. |
| indexof | Function reports the zero-based index of the first occurrence of a specified string within input string. |
| isascii | Checks whether all characters in an input string are ASCII characters. |
| isempty | Returns true if the argument is an empty string or is null. |
| isnotempty | Returns true if the argument isn’t an empty string or a null. |
| isnotnull | Returns true if the argument isn’t null. |
| isnull | Evaluates its sole argument and returns a bool value indicating if the argument evaluates to a null value. |
| parse_bytes | Parses a string including byte size units and returns the number of bytes |
| parse_csv | Splits a given string representing a single record of comma-separated values and returns a string array with these values. |
| parse_json | Interprets a string as a JSON value and returns the value as dynamic. |
| parse_url | Parses an absolute URL string and returns a dynamic object contains all parts of the URL. |
| parse_urlquery | Parses a URL query string and returns a dynamic object contains the Query parameters. |
| quote | Returns a string representing the input enclosed in double quotes, with internal quotes and escape sequences handled appropriately. |
| replace_regex | Replaces all regex matches with another string. |
| replace_string | Replaces all string matches with another string. |
| replace | Replace all regex matches with another string. |
| reverse | Function makes reverse of input string. |
| split | Splits a given string according to a given delimiter and returns a string array with the contained substrings. |
| strcat_delim | Concatenates between 2 and 64 arguments, with delimiter, provided as first argument. |
| strcat | Concatenates between 1 and 64 arguments. |
| strcmp | Compares two strings. |
| string-size | Returns the length, in characters, of the input string. |
| strlen | Returns the length, in characters, of the input string. |
| strrep | Repeats given string provided number of times (default = 1). |
| substring | Extracts a substring from a source string. |
| tolower | Converts a string to lower case. |
| totitle | Converts a string to title case. |
| toupper | Converts a string to upper case. |
| translate | Substitutes characters in a string, one by one, based on their position in two input lists. |
| trim_end_regex | Removes trailing match of the specified regular expression. |
| trim_end | Removes trailing match of the specified cutset. |
| trim_regex | Removes all leading and trailing matches of the specified regular expression. |
| trim_space | Removes all leading and trailing whitespace from a string. |
| trim_start_regex | Removes leading match of the specified regular expression. |
| trim_start | Removes leading match of the specified cutset. |
| trim | Removes all leading and trailing matches of the specified cutset. |
| unicode_codepoints_from_string | Converts a UTF-8 string into an array of Unicode code points. |
| unicode_codepoints_to_string | Converts an array of Unicode code points into a UTF-8 encoded string. |
| url_decode | Converts encoded URL into a regular URL representation. |
| url_encode | Converts characters of the input URL into a format that can be transmitted over the Internet. |