A complete reference of all built-in functions available in the Jyro scripting language.
Immutability: Jyro follows an immutable-by-default design. Functions return new values rather than modifying their inputs in place. Your original data is never altered.
Chaining: Functions that return arrays, strings, or objects can be chained by nesting calls or using the result as input to another function. Functions that return scalars (numbers, booleans) or null are terminal and cannot be meaningfully chained.
Function Description Mutates Chainable Append Adds an element to the end of an array No, returns new array Yes Concatenate Joins two arrays into a single new array No, returns new array Yes Distinct Removes duplicate elements, keeping first occurrence No, returns new array Yes First Returns the first element, or null if empty No No Flatten Recursively flattens nested arrays into a single level No, returns new array Yes FlattenOnce Flattens nested arrays by one level only No, returns new array Yes GroupBy Groups array elements by a field value into an object No, returns new object Yes (object) IndexOf Returns the position of a value in an array or string No No Insert Inserts an element at a specified index No, returns new array Yes Last Returns the last element, or null if empty No No Length Returns the length of a string, array, or object No No Prepend Adds an element to the beginning of an array No, returns new array Yes RandomChoice Selects a random element from an array No No Range Generates an array of numbers in a range with optional step No, returns new array Yes RemoveAt Removes the element at a specified index No, returns new array Yes RemoveFirst Removes the first element from an array No, returns new array Yes RemoveLast Removes the last element from an array No, returns new array Yes Reverse Reverses the order of elements No, returns new array Yes SelectMany Flattens a nested array field from each object No, returns new array Yes Skip Skips the first N elements No, returns new array Yes Slice Extracts a portion of an array by index range No, returns new array Yes Sort Sorts elements by type group then value No, returns new array Yes SortByField Sorts objects by a field in ascending or descending order No, returns new array Yes
Function Description Mutates Chainable DateAdd Adds a time amount to a date No, returns new string No DateDiff Calculates the difference between two dates in a given unit No No DatePart Extracts a component from a date (year, month, day, etc.) No No FormatDate Formats a date using a .NET format pattern No, returns new string No Now Returns the current UTC date and time in ISO 8601 No No ParseDate Parses a date string and normalizes to ISO 8601 No, returns new string No Today Returns the current UTC date without time No No
Higher-order functions that accept inline lambda expressions as arguments.
Function Description Mutates Chainable All Tests whether all elements satisfy a predicate No No Find Returns the first element matching a predicate No No Each Executes a lambda for each element (side effects only) No, returns null No Map Transforms each element using a lambda No, returns new array Yes Reduce Accumulates an array into a single value No No Any Tests whether any element satisfies a predicate No No SortBy Sorts an array using a lambda key extractor No, returns new array Yes Where Filters an array using a lambda predicate No, returns new array Yes
Function Description Mutates Chainable Abs Returns the absolute value of a number No No Average Returns the arithmetic mean of numeric values No No Ceiling Rounds up to the nearest integer No No Clamp Constrains a number to a min/max range No No Floor Rounds down to the nearest integer No No Log Returns the logarithm with an optional base No No Max Returns the largest numeric value in an array No No Median Returns the median value of a numeric array No No Min Returns the smallest numeric value in an array No No Mode Returns the most frequently occurring value No No Power Raises a number to a specified power No No RandomInt Generates a cryptographically secure random integer No No SquareRoot Returns the square root of a number No No Sum Returns the sum of all numeric values in an array No No
Field-based query functions for filtering and projecting arrays of objects.
Function Description Mutates Chainable AllByField Tests whether all objects match a field condition No No AnyByField Tests whether any object matches a field condition No No CountIf Counts objects matching a field condition No No WhereByField Returns objects matching a field condition No, returns new array Yes FindByField Returns the first object matching a field condition No No Omit Removes specified fields from each object No, returns new array Yes Project Extracts specified fields from each object No, returns new array Yes Select Extracts a single field value from each object No, returns new array Yes
Function Description Mutates Chainable ValidateRequired Checks that an object contains required non-null fields No No ValidateSchema Validates data against a JSON Schema, returning errors No, returns new array Yes
Function Description Mutates Chainable Contains Tests whether a string contains a substring (or array contains element) No No EndsWith Tests whether a string ends with a suffix No No Join Joins array elements into a string with a separator No, returns new string Yes (string) ToLower Converts a string to lowercase No, returns new string Yes (string) PadLeft Pads a string on the left to a specified width No, returns new string Yes (string) PadRight Pads a string on the right to a specified width No, returns new string Yes (string) RandomString Generates a cryptographically secure random string No, returns new string Yes (string) RegexMatch Returns the first regex match No No RegexMatchAll Returns all regex matches as an array No, returns new array Yes RegexMatchDetail Returns a detailed match object with capture groups No, returns new object Yes (object) RegexTest Tests whether a string matches a regex pattern No No Replace Replaces all occurrences of a substring No, returns new string Yes (string) Split Splits a string into an array using a delimiter No, returns new array Yes (array) StartsWith Tests whether a string begins with a prefix No No Substring Extracts a portion of a string by position and optional length No, returns new string Yes (string) ToNumber Converts a string to a number (returns null on failure) No No ToUpper Converts a string to uppercase No, returns new string Yes (string) Trim Removes leading and trailing whitespace No, returns new string Yes (string)
Function Description Mutates Chainable Base64Decode Decodes a Base64 string to UTF-8 No, returns new string Yes (string) Base64Encode Encodes a string to Base64 No, returns new string Yes (string) Clone Creates a deep copy of a value No, returns new value Yes Coalesce Returns the first non-null value from an array No Depends on result type Equal Tests deep equality of two values No No FromJson Parses a JSON string into a Jyro value No, returns new value Depends on result type HasProperty Tests whether an object has a property (even if null) No No Keys Returns all property names as an array No, returns new array Yes (array) Merge Merges multiple objects into a new object No, returns new object Yes (object) NewGuid Generates a new UUID v4 string No No NotEqual Tests deep inequality of two values No No ToBoolean Converts a value to boolean using Jyro truthiness rules No No ToJson Converts a Jyro value to a JSON string No, returns new string Yes (string) ToString Converts a value to its string representation No, returns new string Yes (string) TypeOf Returns the type name as a string No No Values Returns all property values as an array No, returns new array Yes (array)
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