Functions

Text 

FunctionSummary
APPEND

Joins two or more pieces of text together.

BYTESIZE

Counts the number of bytes in a string.

CAPITALIZE

Makes the first character of text uppercase and converts the remaining characters to lowercase.

DEFAULT

Allows you to specify a fallback in case a value doesn’t exist.

Returns the fallback value if the input is null, false, or an empty text value, array, or object.

DOWNCASE

Makes each character in text lowercase.

ENDS_WITH

Returns true if the text ends with the suffix

ESCAPE

Escapes text by replacing characters with escape sequences (e.g. so that the text can be used in a URL)

ESCAPE_ONCE

Escapes text without changing existing escaped entities.

ESTIMATED_TOKEN_COUNT

Estimates the number of tokens which would represent the input data when passed to a Claude 3 LLM. The token count is an estimate based on an older Claude tokenizer and will not be an exact match for the tokens used.

FORCE_ARRAY

If the supplied argument is an array it returns it, otherwise wraps it in an array

HTML_DECODE

Converts escaped characters in text to HTML syntax characters, e.g. &lt;élan&gt; becomes <élan>.

HTML_ENCODE

Escapes HTML syntax characters in text, e.g. <élan> becomes &lt;élan&gt;.

INCLUDES

Returns TRUE if target (which can be text, an object or an array) includes value, otherwise returns FALSE. See examples for what "includes" means for different types.

INDEX_OF

Returns the index of the specified term within the provided string or array. With arrays you can provide a LAMBDA as the second argument, and the index of the first matching result it returned.

IS_BLANK

Returns true if a value is falsy ie. FALSE, "", [], {}, NULL, and false otherwise. IS_PRESENT is the opposite of this.

IS_EMPTY

Returns true if a value is empty ie. "", [], {} and false otherwise

IS_PRESENT

Returns true unless blank. The result is false for any of FALSE, "", [], {}, NULL, and true otherwise

LAST_INDEX_OF

Returns the last index of the specified term within the provided string or array. With arrays you provide a LAMBDA as the second argument.

LEGACY_STRINGIFY

Converts an object parameter to a legacy String representation.

LEVENSHTEIN_DISTANCE

Compute the Levenshtein distance between two strings.

LSTRIP

Removes all whitespace (tabs, spaces, and newlines) from the beginning of text.

Does not affect spaces between words.

MATCH

Returns true if text contains the regex expression regex_to_match and false otherwise.

NEWLINE_TO_BR

Replaces every newline (\n) with an HTML line break (<br>).

PLURALIZE

Outputs the singular or plural version of text based on the value of a number.

PREPEND

Adds the specified text to the beginning of the other text.

REGEX_EXTRACT

Returns an array of all the regex matches on the input text.

Optionally, include a string containing Ruby modifiers – e.g. i for case insensitive mode.

REGEX_REPLACE

Replaces every occurrence of a regex match in text with the second argument.

REMOVE

Removes every occurrence of the specified sub-text from text.

REMOVE_FIRST

Removes the first occurrence of the specified sub-text from text.

REPLACE

Replaces every occurrence of the search text with the replacement text.

REPLACE_FIRST

Replaces the first occurrence of the search text with the replacement text.

RSTRIP

Removes all whitespace (tabs, spaces, and newlines) from the right side of text.

SIZE

Returns the number of characters in text or the number of elements in an array.

SLICE

Returns 1 or length characters from a piece of text, beginning at the start_index.

SPLIT

Divides the input text into an array using the delimiter as a separator

STARTS_WITH

Returns true if the text begins with the prefix

STRIP

Removes all whitespace (tabs, spaces, and newlines) from both the left and right side of text.

It does not affect spaces between words.

STRIP_HTML

Removes any HTML tags from text.

STRIP_NEWLINES

Removes any newline characters (line breaks) from text.

TEXT

Converts the passed value to text.

TO_SNAKE_CASE

Turn input text into snake case.

TRANSLITERATE

Replaces non-ASCII characters with an ASCII approximation, or if none exists, a replacement character: “?”.

TRUNCATE

Shorten text down to the number of characters passed as a parameter.

If the number of characters specified is less than the length of the text, ... is appended to the text and is included in the character count.

TRUNCATEWORDS

Shortens text down to the number of words passed as the argument.

If the specified number of words is less than the number of words in the text, ... is appended to the text.

UPCASE

Makes each character in text uppercase.

URL_DECODE

Decodes text that has been encoded as a URL or by URL_ENCODE.

URL_ENCODE

Converts any URL-unsafe characters in the given text into percent-encoded characters.

UUID

Generates a universally unique identifier (UUID)

Logic 

FunctionSummary
AND

Returns TRUE if all arguments are truthy, otherwise returns FALSE.

DEFAULT

Allows you to specify a fallback in case a value doesn’t exist.

Returns the fallback value if the input is null, false, or an empty text value, array, or object.

IF

If condition is TRUE returns second argument, if FALSE returns null or the third argument.

IF_ERROR

If expression produces an error, the result of fallback_expression is returned. If there is no error, the result of expression is returned.

IS_BLANK

Returns true if a value is falsy ie. FALSE, "", [], {}, NULL, and false otherwise. IS_PRESENT is the opposite of this.

IS_PRESENT

Returns true unless blank. The result is false for any of FALSE, "", [], {}, NULL, and true otherwise

NOT

Returns the logical opposite of the supplied param.

OR

Returns true if any of the arguments are truthy, otherwise returns false.

Numbers 

FunctionSummary
ABS

Returns the absolute value of a number.

ACOS

Computes the arc cosine of x (in radians), returning a number between 0 and π

ASIN

Computes the arc sine of x (in radians), returning a number between -π/2 and π/2

AT_LEAST

Limits a number to a minimum value.

AT_MOST

Limits a number to a maximum value.

AVERAGE

Returns the average (mean) numeric value. Can either be called with a single argument which must be an array or multiple numeric arguments.

CEIL

Rounds the input up to the nearest whole number.

COS

Computes the cosine of x (in radians), returning a number between -1 and 1

DIVIDED_BY

Divides a number by the specified number.

ESTIMATED_TOKEN_COUNT

Estimates the number of tokens which would represent the input data when passed to a Claude 3 LLM. The token count is an estimate based on an older Claude tokenizer and will not be an exact match for the tokens used.

FLOOR

Rounds a number down to the nearest whole number.

IS_BLANK

Returns true if a value is falsy ie. FALSE, "", [], {}, NULL, and false otherwise. IS_PRESENT is the opposite of this.

IS_PRESENT

Returns true unless blank. The result is false for any of FALSE, "", [], {}, NULL, and true otherwise

MAX

Returns the argument with the highest numeric value. Can either be called with a single argument which must be an array or multiple arguments

MIN

Returns the argument with the lowest numeric value. Can either be called with a single argument which must be an array or multiple arguments.

MINUS

Subtracts a number from another number.

MODULO

Returns the remainder of a division operation.

NUMBER

Converts the passed value to a number.

PLUS

Adds a number to another number.

RANDOM

Returns a random number in the range specified.

ROUND

Rounds an input number to the nearest whole number or, if precision is specified, to that number of decimal places.

SIN

Computes the sine of x (in radians), returning a number between -π/2 and π/2

SQRT

Computes the square root of a given number

SUM

Sums the elements in an array of numbers.

TIMES

Multiplies a number by another number.

Arrays 

FunctionSummary
ARRAY

Returns an Array with each of the arguments as a member.

CHUNK_ARRAY

Chunks an array into arrays with chunk_size elements. The last chunk may contain less than chunk_size elements.

COMPACT

Removes any null values from an array.

CONCAT

Concatenates (joins together) two or more arrays.

COUNTIF

Returns the count of all elements in an array that are equal to the comparison argument.

DEFAULT

Allows you to specify a fallback in case a value doesn’t exist.

Returns the fallback value if the input is null, false, or an empty text value, array, or object.

DELETE

Deletes an item from an array at a given index and returns the array minus that deleted value.

DIFFERENCE

Returns an array of items that appear in the first array but not in the second array

ESTIMATED_TOKEN_COUNT

Estimates the number of tokens which would represent the input data when passed to a Claude 3 LLM. The token count is an estimate based on an older Claude tokenizer and will not be an exact match for the tokens used.

FILTER

Filters an array or an object by a lambda function or an array of values to keep.

If the target is an array, the lambda must take one argument: the value.

If the target is an object, the lambda can take one or two arguments. If the lambda takes one argument, the argument is the value. If the lambda takes two arguments, the first argument is the key and the second argument is the value.

FIND

Returns the first element in the array for which the lambda returns true.

FIRST

Returns the first element of an array.

FLATTEN

Turn nested arrays into a single 1 dimensional array

INCLUDES

Returns TRUE if target (which can be text, an object or an array) includes value, otherwise returns FALSE. See examples for what "includes" means for different types.

INDEX_OF

Returns the index of the specified term within the provided string or array. With arrays you can provide a LAMBDA as the second argument, and the index of the first matching result it returned.

INSERT

Inserts an item into an array at a given index.

INTERSECTION

Returns the intersection between two arrays.

IS_BLANK

Returns true if a value is falsy ie. FALSE, "", [], {}, NULL, and false otherwise. IS_PRESENT is the opposite of this.

IS_EMPTY

Returns true if a value is empty ie. "", [], {} and false otherwise

IS_PRESENT

Returns true unless blank. The result is false for any of FALSE, "", [], {}, NULL, and true otherwise

JOIN

Combines the elements in an array into a single text value using the argument as a separator.

LAST

Returns the last element of an array.

LAST_INDEX_OF

Returns the last index of the specified term within the provided string or array. With arrays you provide a LAMBDA as the second argument.

MAP

Creates an array by extracting the values of a given key or path from an array of objects. If a property name has spaces, wrap it in square brackets and double quotes.

PUSH

Adds one or more items to the end of an array.

RANDOM_ELEMENT

Select a random element from an array.

RANGE

Returns an array of numbers with the first value equal to start and the last value equal to end.

REJECT

Rejects items from an array or an object by a lambda function or an array of values to remove.

If the target is an array, the lambda must take one argument: the value.

If the target is an object, the lambda can take one or two arguments. If the lambda takes one argument, the argument is the value. If the lambda takes two arguments, the first argument is the key and the second argument is the value.

REVERSE

Reverses the order of the elements in an array.

ROTATE

Rotates the elements in an array by any number of steps.

SHUFFLE

Shuffles all the elements in an array

SIZE

Returns the number of characters in text or the number of elements in an array.

SLICE_ARRAY

Returns the remainder of the array (or length elements of the array, if specified), beginning at the start_index.

SORT

Sorts elements in an array by a property of an element in the array (case-sensitive). Pass a dot-separated path to sort by nested keys.

SORT_NATURAL

Sorts elements in an array by a property of an element in the array (case-insensitive). Pass a dot-separated path to sort by nested keys.

SUM

Sums the elements in an array of numbers.

TALLY

Counts the occurrences of each unique element within an array, accounting for case sensitivity.

UNION

This function merges two arrays. These arrays can either be within the same Event or from two distinct Actions. The function requires that the inputs be arrays, although it can also process an array nested within an object, as long as it directly references the array. The order of the merged array is determined by the sequence in which the paths are listed.

UNIQ

Removes any duplicate elements in an array.

WHERE

Takes an array of objects, a path and a value. The path can be a single key or a dot-separated series of keys. Returns a new array containing only the objects where the value at the key/path matches the provided value.

Objects 

FunctionSummary
DEEP_MERGE

Creates a new object by recursively merging two or more objects together. Where there are key collisions that last value is used.

ESTIMATED_TOKEN_COUNT

Estimates the number of tokens which would represent the input data when passed to a Claude 3 LLM. The token count is an estimate based on an older Claude tokenizer and will not be an exact match for the tokens used.

FILTER

Filters an array or an object by a lambda function or an array of values to keep.

If the target is an array, the lambda must take one argument: the value.

If the target is an object, the lambda can take one or two arguments. If the lambda takes one argument, the argument is the value. If the lambda takes two arguments, the first argument is the key and the second argument is the value.

FLATTEN_JSON

Flattens nested JSON into a new object with a single layer of key/value pairs. Default key separator is a period or full stop (.)

GET

Get the value in object at the specified key or path. If a property name has spaces, wrap it in square brackets and quotes.

INCLUDES

Returns TRUE if target (which can be text, an object or an array) includes value, otherwise returns FALSE. See examples for what "includes" means for different types.

IS_BLANK

Returns true if a value is falsy ie. FALSE, "", [], {}, NULL, and false otherwise. IS_PRESENT is the opposite of this.

IS_EMPTY

Returns true if a value is empty ie. "", [], {} and false otherwise

IS_PRESENT

Returns true unless blank. The result is false for any of FALSE, "", [], {}, NULL, and true otherwise

IS_VALID_JSON_SCHEMA

Returns true if the object provided matches the provided json schema, using the https://json-schema.org/ syntax.

JSONPATH

Evaluates objects using JSONPath expressions. JSONPath expressions support wildcards, filters, and slices. See JSONPath or the Online Evaluator for more information. More examples of how to use JSONPATH can be seen in our Story Library

JSON_SCHEMA_VALIDATE

Returns a validation error message if the object provided does not match the provided json schema, using the https://json-schema.org/ syntax or an empty string otherwise.

KEYS

Returns an array of keys present in the object.

MERGE

Creates a new object by merging two or more objects together.

OBJECT

Returns an object with keys and values as specified.

REJECT

Rejects items from an array or an object by a lambda function or an array of values to remove.

If the target is an array, the lambda must take one argument: the value.

If the target is an object, the lambda can take one or two arguments. If the lambda takes one argument, the argument is the value. If the lambda takes two arguments, the first argument is the key and the second argument is the value.

REMOVE_KEY

Removes the specified key from an object. Path is a dot separated path to the object, you can escape dots using backslash

SET_KEY

Sets an object key to a value. If the key already exists, it will be overwritten. Nested keys can be specified using dot notation.

UNFLATTEN_JSON

Transforms a single layer of key/value pairs into a nested JSON structure. Default key separator is a period or full stop (.)

VALUES

Returns all the values of an object.

WHERE

Takes an array of objects, a path and a value. The path can be a single key or a dot-separated series of keys. Returns a new array containing only the objects where the value at the key/path matches the provided value.

Dates/Times 

FunctionSummary
DATE

Takes a date, represented by a string, an integer, or a DATE_PARSE object, and returns a formatted string representation.

The output format is defined in ruby strftime (Time) syntax.

Optionally, the output timezone can be specified with values from the tz database.

Natural language parsing is handled by chronic. When it receives ambiguous dates, ie "01/02/2023", it will default to the EU format (DD/MM/YYYY). Combine with DATE_PARSE to explicitly define the format.

DATE_DIFF

Returns the precise difference between two given times in terms of years, months, weeks, days, hours, minutes, and seconds. It handles differences across time zones, accounts for leap years, considers months with varying days, and presents both the unit and cumulative differences. When the start time is after the end time the result is returned with absolute values.

DATE_PARSE

Parses a date and returns an object representation. Fields include the iso8601 and unix timestamp representations and numerical breakdowns. Useful for parsing dates that would be otherwise ambiguous, like 01/02/2023, before passing them to DATE to be formatted. The date is parsed based on the format string, which uses the ruby strptime (Time) syntax. If format is omitted, DATE_PARSE attempts to guess the format. Optionally, the timezone can be specified with values from the tz database.

Natural language parsing is handled by chronic.

DAY

Returns the day of the month for the specified date. Accepted Format: year-month-day (year/month/day)

DISTANCE_OF_TIME_IN_WORDS

Returns the distance between two times in words for the provided date/time. Defaults to the current time if "from" is unspecified. Distances for seconds below 1 minute and 29 seconds are reported based on the following table:

0-4 secs # => less than 5 seconds 5-9 secs # => less than 10 seconds 10-19 secs # => less than 20 seconds 20-39 secs # => half a minute 40-59 secs # => less than a minute 60-89 secs # => 1 minute

HOUR

Returns the hour of the day for the specified date. Accepted Formats: T17:49:01+0000, 17:49:01, or 2022-03-19T17:49:01+0000

MINUTE

Returns the minute of the hour for the specified date. Accepted Formats: T17:49:01+0000, 17:49:01, or 2022-03-19T17:49:01+0000

MONTH

Returns the month of the year for the specified date. Accepted Format: year-month-day (year/month/day)

NOW

Returns the current date and time.

SECOND

Returns the second of the minute for the specified date.

TODAY

Returns the current date

UNIX_TIMESTAMP

Returns the current unix timestamp, i.e. the number of seconds since midnight on 1 January 1970

YEAR

Returns the year for the specified date.

Hashing/Signing 

FunctionSummary
AES_DECRYPT

Decrypts text using AES-256-CBC

The input must be Base64 encoded. An initialization vector can optionally be passed as a third argument.

AES_ENCRYPT

Encrypts text using AES-256-CBC

The output is Base64 encoded. An initialization vector can optionally be passed as a third argument. Note, the secret key must be 32 characters long.

GENERATE_RSA_KEYS

Generates a pair of public and private keys using the RSA encryption algorithm. The key size can be either 2048 or 4096, and the default is 2048.

HMAC_SHA1

Converts text into a SHA-1 hash using a hash message authentication code (HMAC).

HMAC_SHA1_BASE64

Converts text into a Base64 encoded SHA-1 hash using a hash message authentication code (HMAC).

HMAC_SHA256

Converts text into a SHA-256 hash using a hash message authentication code (HMAC).

HMAC_SHA256_BASE64

Converts text into a Base64 encoded SHA-256 hash using a hash message authentication code (HMAC).

JWT_SIGN

Creates a JSON Web Token from the input claim set using either RS256 (default), HS256 or ES256.

MD5

Calculates the hex encoded MD5 hash of some text.

MD5_BASE64

Calculates the Base64 encoded MD5 hash of text.

RSA_AES_HYBRID_DECRYPT

Decrypts data that was encrypted with RSA_AES_HYBRID_ENCRYPT, using a provided public or private RSA key. A padding choosing from "PKCS1_PADDING", "PKCS1_OAEP_PADDING" and "SSLV23_PADDING" can be passed in with "PKCS1_PADDING" being the default.

RSA_AES_HYBRID_ENCRYPT

Encrypts data of arbitrary length using a provided public or private RSA key, in a hybrid cryptosystem internally using AES. A padding choosing from "PKCS1_PADDING", "PKCS1_OAEP_PADDING" and "SSLV23_PADDING" can be passed in with "PKCS1_PADDING" being the default.

RSA_DECRYPT

Decrypts encrypted data using a public or private key. A padding choosing from "PKCS1_PADDING", "PKCS1_OAEP_PADDING" and "SSLV23_PADDING" can be passed in with "PKCS1_PADDING" being the default.

RSA_ENCRYPT

Encrypts data using a public or private key. A padding choosing from "PKCS1_PADDING", "PKCS1_OAEP_PADDING" and "SSLV23_PADDING" can be passed in with "PKCS1_PADDING" being the default.

SHA1

Calculates the sha1 hash of text.

SHA256

Calculates the sha256 hash of text, expressed in hex.

SHA256_BASE64

Calculates the sha256 hash of the text, expressed in base64.

SHA512

Calculates the sha512 hash of text.

ZSCALER_OBFUSCATE_API_KEY

Obfuscates a Zscaler API key using the function described in the Zscaler API documentation. For the "now" argument provide the current time in milliseconds since the epoch with DATE(NOW(), "%s%L").

Data Parsing/Conversion 

FunctionSummary
BASE64URL_DECODE

Decode URL-safe Base64 encoded text.

BASE64URL_ENCODE

Encode text to URL-safe Base64 encoded text.

BASE64_DECODE

Decode Base64 encoded text.

BASE64_ENCODE

Encode text using the Base64 encoding algorithm.

COMBINE_COLUMNS_AND_ROWS

Combines labeled columnar data into a list of objects. Useful for processing data returned from APIs like Snowflake, Databricks, or Google Sheets.

CSV_PARSE

Parses CSV-formatted text with auto-detection of the delimiter character and parses output into an array of arrays.

CSV_PARSE_TO_OBJECTS

Parses CSV-formatted text with auto-detection of the delimiter character and parses output into an array of objects.

EML_PARSE

Takes text containing EML (RFC822) content and parses out information such as to, from, subject, attachments, etc.

GUNZIP

Decompresses from a gzip. If there are multiple files in the archive the results are concatenated.

GZIP

Compresses a single file with gzip

HCL_PARSE

Parses Hashicorp Configuration Language (HCL) text

HEX_PARSE

Converts hexadecimal text into the text or data it represents

JSON_PARSE

Parses escaped JSON text. If used in a formula field, it will return a JSON object; if used inside a text field it will return unescaped JSON text.

LDIF_PARSE

Parse text from a LDAP Data Interchange Format (LDIF) file into an object

MIME_HEADER_DECODE

Decodes email header fields encoded in accordance with RFC 2047.

MSG_PARSE

Takes the contents of an .msg file (Outlook item/email) and parses out information such as to, from, subject, attachments, etc.

By default headers are truncated on newline characters. To parse full headers set the extract_multiline_headers optional parameter to TRUE

Output is consistent with EML_PARSE.

NEAT_JSON

Formats and "pretty prints" an object in JSON.

OBJECTS_TO_CSV

Parses an array of objects with the same keys into CSV-formatted text. Headers are optional, if none are provided the keys of the first object are used.

PARSE_URL

Returns an object that representing the parsed url

TAR

Creates a tarball for a list of files

TO_CSV

Convert an array of arrays into CSV-formatted text.

TO_HEX

Converts text or data into hexadecimal text.

TO_JSON

Convert an object into JSON text.

TO_XML

Converts an object into XML, root element name is optional.

TO_YAML

Converts an object into YAML

UNTAR

Extracts a list of files from a tarball.

UNZIP

Extracts files from a ZIP archive.

XML_PARSE

Takes text containing XML and parses to an object

YAML_PARSE

Takes text containing YAML and parses to an object

ZIP

Creates a ZIP archive containing a given file or files.

If the optional password parameter is present then the archive will be password protected.

The function can also accept an array of file objects as its first argument. The file object must contain either contents or base64encoded contents, a file name and optionally can specify the created_at date in ISO8601 format.

If the output of the ZIP function is being included in event data, it should be wrapped in the BASE64_ENCODE function to avoid errors - e.g. BASE64_ENCODE(ZIP(my_action)).

IP Addresses 

FunctionSummary
IN_CIDR

Checks if an IP address is in a given CIDR block.

IS_IPV4

Checks if a text value is a valid IPV4 address.

IS_IPV6

Checks if a text value is a valid IPV6 address.

IS_IP_ADDRESS

Checks if a text value is a valid IP address

Lambdas 

FunctionSummary
COUNTIF

Returns the count of all elements in an array that are equal to the comparison argument.

FILTER

Filters an array or an object by a lambda function or an array of values to keep.

If the target is an array, the lambda must take one argument: the value.

If the target is an object, the lambda can take one or two arguments. If the lambda takes one argument, the argument is the value. If the lambda takes two arguments, the first argument is the key and the second argument is the value.

FIND

Returns the first element in the array for which the lambda returns true.

LAMBDA

Creates a custom, reusable function.

The last argument is the calculation you want to perform, all previous arguments are the parameters for this calculation

MAP_LAMBDA

Return an array that is the result of calling lambda with each element of the input array.

REDUCE

Iterates over elements in an array, applying a specified lambda function to accumulate a result. This function takes 3 arguments

array: The iterable to be reduced.

LAMBDA: A lambda function with two arguments (previous and current) that defines the reduction operation. Optionally, an expression [expr] can be included for additional computation.

initial_value: an initial value for the accumulator. The reduction starts with this value.

REJECT

Rejects items from an array or an object by a lambda function or an array of values to remove.

If the target is an array, the lambda must take one argument: the value.

If the target is an object, the lambda can take one or two arguments. If the lambda takes one argument, the argument is the value. If the lambda takes two arguments, the first argument is the key and the second argument is the value.

Story Metadata 

FunctionSummary
PROMPT

Emit a URL that when visited will cause the current action to emit a new event. Text is optional, if provided will be available in the status field of the emitted event. Prompt docs

STORY_RUN_GUID

Returns the GUID of the currently executing story run.

STORY_RUN_LINK

Returns a link to the currently executing story run.

WORKBENCH_LINK

Produces a URL that when visited will load the incoming event data in Workbench for a user, so long as they have permission to see the event.

Other 

FunctionSummary
TYPE

Outputs the type (class) of the specified value.

Strings 

FunctionSummary
IS_EMAIL

Checks if a text value follows the email standard. This not guarantee that it's a valid email.

IS_IPV4

Checks if a text value is a valid IPV4 address.

IS_IPV6

Checks if a text value is a valid IPV6 address.

IS_JSON

Checks if a text value is valid JSON.

IS_URL

Checks if a text value follows the url standard. This not guarantee that it's a valid url.

IS_XML

Checks if a text value is valid XML.

IS_YAML

Checks if a text value is valid YAML.

RANDOM_STRING

Returns a string of random characters. The function takes three optional arguments: length, mode, and custom.

length determines the length of the string (default 16).

mode determines the type of characters in the string. The options are "alphanumeric", "custom", "hex", "letters", "numbers" (default "alphanumeric").

The custom_characters argument is only used when mode is set to "custom". It is a string of characters that will be used to generate the random string.

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