Molecule/molecule.boilerplate/molecule.boilerplate.api/KeywordsStable/rand

rand

molecule.boilerplate.api.KeywordsStable.rand

trait rand extends AggrKw

Random attribute value(s).

Apply random keyword to attribute to return a single random attribute of entities matching the molecule.

for {
 _ <- Person.age.insert(25, 34, 37, 42, 70)
 _ <- Person.age(random).get.map(_.head ==> 34) // or other..
} yield ()

Apply random(n) to return Vector of n random values. Observe though that duplicate random values can re-occur.

Person.age(random(3)).get.map(_.head ==> Vector(42, 25, 42)) // or other..

To get distinct values only, use the sample(n) keyword instead.

Attributes

Source: Keywords.scala
Graph
Supertypes: trait AggrKw

trait Kw

class Object

trait Matchable

class Any
Known subtypes: object rand.type

Members list

Grouped members

aggregates

Random values of attribute.

Apply a number n to random to return Stream of n random attribute values of from entities matching the molecule.
Observe that duplicate random values can re-occur.

for {
 _ <- Person.age.insert(25, 34, 37, 42, 70)
 _ <- Person.age(random(3)).get.map(_.head ==> Stream(42, 25, 42)) // or other..
} yield ()

To get distinct values only, use the sample(n) keyword instead.

Attributes

Returns: List[attribute-type]
Source: Keywords.scala

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