Skip to content


The record module contains functions to work with records. ## Functions


Returns the length of an record (number of key value pairs).

Returns an integer


Returns if an record is empty.

Returns a bool

contains(record, key)

Returns if an record contains a given key.

Returns a bool


Returns an array of record keys.

record::keys({"a": 1, "b": 2}) == ["a", "b"]

Returns a [string]


Returns an array of record values.

record::values({"a": 1, "b": 2}) == [1, 2]

Returns a [any]


Turns the record into an array of key value pairs.

record::to_array({"a": 1, "b": 2}) == [["a", 1], ["b", 2]]

Returns a [(string, any)]


Turns an array of key value pairs into an record.

Note: array's elements need to be arrays of two elements with the first element being a string.

record::from_array([["a", 1], ["b", 2]]) == {"a": 1, "b": 2}

Returns a record

select(record, array)

'Selects' a given set of field from an record, removing all others.

record::select({"a": 1, "b": 2, "c": 3}, ["a", "c"]) == {"a": 1, "c": 3}

Returns a record

merge(left, right)

Merges the two records left and right overwriting existing values in left with those provided in right

record::merge({"a": 1, "b": 2, "c": 4}, {"c": 3, "d": 4})
== {"a": 1, "b": 2, "c": 3, "d": 4}

Returns a record

rename(target, changes)

Renames the keys in the record target based on the key value pairs in the record changes where the key is the current name and the value is the new name.

record::rename({"a": 1, "b": 2, "c": 4}, {"a": "A", "b": "B"})
== {"A": 1, "B": 2, "c": 4}

Returns a record