import type { Predicate } from "@thi.ng/api" ; import { isIterable } from "@thi.ng/checks/is-iterable" ; import type { Reducer , Transducer } from "./api.js" ; import { compR } from "./compr.js" ; import { iterator1 } from "./iterator.js" ; export function filter < T > ( pred ) ; export function filter < T > ( pred , src ) ; export function filter < T > ( pred , src ? ) { return isIterable ( src ) ? iterator1 ( filter ( pred ) , src ) : ( rfn ) => { const r = rfn [ 2 ] ; return compR ( rfn , ( acc , x ) => ( pred ( x ) ? r ( acc , x ) : acc ) ) ; } ; }