Miscellaneous

Name	Description	Example
now	Returns current timestamp	`now() > timestamp("2015-06-24T17:35:50Z")`
random	Returns a random number between 0 and 1	`1>=random()>=0`
size	Returns the length of a string or number of objects in a set	`size("Recombee") == 8`
item_values	Returns property values of a particular item as a dictionary	`item_values("item-42")["description"]`
reduce	Reduces a set into a single value using an operator	`reduce("+", {1, 2, 3}) == 6`

Now

Returns current timestamp.

Definition

now()

Example

The following expression results in true:

now() > timestamp("2015-06-24T17:35:50Z")

Random

Returns a random number between 0 and 1.

Definition

random()

Size

Returns the length of a string or number of objects in a set.

Definition

size(value)

Argument	Type
value	`string` `set`

Examples

All the following expressions result in true:

size("Recombee") == 8

size("") == 0

size({"abc", 4, {} } ) == 3

// Objects in nested set are not counted
size({ {1,2,3} } ) == 1

Item Values

Returns property values of a particular item as a dictionary.

Definition

item_values(item_id)

Argument	Type	Meaning
value	`string`	ID of an item

Example

// Returns value of property "category" for item with ID "item-42"
item_values("item-42")["category"]

Reduce

Reduces a set into a single value using an operator.

Definition

reduce(operator, input_set, initial_value)

Argument	Type	Meaning
operator	`string`	One of `+`, `*`, `&`, `and`, `or`
input_set	`set`	Set that will be reduced
initial_value	Same type as members of `input_set`	Optional. Value used as left operand for the first operation.

Example

All the following expressions result in true:

reduce("+", {2, 3, 4}) == 9

reduce("+", {2, 3, 4}, 1) == 10

reduce("*", {2, 3, 4}) == 24

reduce("and", {true, false, true}) == false

reduce("or", {true, false, true}) == true

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