collectype / factory/bigints/bigIntState / bigIntStateFactory
bigIntStateFactory<
T,C>(ctx,oper): <K>(field) =>C
Defined in: factory/bigints/bigIntState.ts:40
Creates a predicate filter for bigint state using PredicType.bigint.state.
T
The item type in the collection.
C extends Wherable<T, C>
The Wherable context type (must extend Wherable<T, C>).
C
The context (usually a collection) supporting the where method.
BigIntStateOper
The bigint state operation (e.g., ‘isZero’, ‘isPositive’, etc.).
Returns a function that takes a field (of type bigint on T) and applies the bigint state predicate to filter the context.
<
K>(field):C
K extends string | number | symbol
K
C
// Example: Composing a bigint state filter as a property, homogeneous model
import { BaseFunctions } from 'collectype';
import { bigIntStateFactory } from 'collectype';
type Person = { name: string; balance: bigint };
class PersonFunctions extends BaseFunctions<Person> {
bigIntIsZero = bigIntStateFactory<Person, this>(this, 'isZero');
}
// Usage:
const people: Person[] = [
{ name: 'Alice', balance: 0n },
{ name: 'Bob', balance: 2000n }
];
const fn = new PersonFunctions(people);
const filtered = fn.bigIntIsZero('balance');
// filtered contains the items where 'balance' is 0n