From 190f85ff1ac23f952a7b4960638fee79495e249a Mon Sep 17 00:00:00 2001 From: Kai Stevenson Date: Sun, 9 Nov 2025 21:52:06 -0800 Subject: filter --- src/lang/js-lang/builtin/sbuiltin.ts | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'src/lang/js-lang') diff --git a/src/lang/js-lang/builtin/sbuiltin.ts b/src/lang/js-lang/builtin/sbuiltin.ts index 7d9b851..60cd117 100644 --- a/src/lang/js-lang/builtin/sbuiltin.ts +++ b/src/lang/js-lang/builtin/sbuiltin.ts @@ -64,6 +64,26 @@ export const V_SBUILTIN_Reduce: SBUILTIN = (node, frame) => { ); }; +export const V_SBUILTIN_Filter: SBUILTIN = (node, frame) => { + const children = getEvaluatedChildren(node, frame); + const fn = children[1] as FnPrim | undefined; + + if (!fn?.fn) { + throw new Error( + `Invalid params for filter: ${JSON.stringify(children, undefined, 2)}` + ); + } + + const values = children[0]; + + if (!Array.isArray(values)) { + // add to ts + throw new Error(`Can't filter non-array value: ${values}`); + } + + return values.filter((v, idx) => callFn(fn, [v, idx], frame) === true); +}; + export const V_SBUILTIN_IfElse: SBUILTIN = (node, frame) => { const children = node.children; @@ -84,5 +104,6 @@ export const nameToSBUILTIN: Record = { call: V_SBUILTIN_Call, map: V_SBUILTIN_Map, reduce: V_SBUILTIN_Reduce, + filter: V_SBUILTIN_Filter, "?": V_SBUILTIN_IfElse, }; -- cgit v1.2.3-70-g09d2