From 413eaa284e164143c5416cdce5a1de0f9f992409 Mon Sep 17 00:00:00 2001 From: Kai Stevenson Date: Sun, 9 Nov 2025 21:08:12 -0800 Subject: map + reduce --- src/lang/js-lang/builtin/sbuiltin.ts | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'src/lang/js-lang/builtin') diff --git a/src/lang/js-lang/builtin/sbuiltin.ts b/src/lang/js-lang/builtin/sbuiltin.ts index 013854c..7d9b851 100644 --- a/src/lang/js-lang/builtin/sbuiltin.ts +++ b/src/lang/js-lang/builtin/sbuiltin.ts @@ -40,6 +40,30 @@ export const V_SBUILTIN_Map: SBUILTIN = (node, frame) => { return values.map((v, i) => callFn(fn, [v, i], frame)); }; +export const V_SBUILTIN_Reduce: SBUILTIN = (node, frame) => { + const children = getEvaluatedChildren(node, frame); + const fn = children[1] as FnPrim | undefined; + const acc = children[2]; + + if (!fn?.fn) { + throw new Error( + `Invalid params for reduce: ${JSON.stringify(children, undefined, 2)}` + ); + } + + const values = children[0]; + + if (!Array.isArray(values)) { + // add to ts + throw new Error(`Can't reduce non-array value: ${values}`); + } + + return values.reduce( + (acc, cur, idx) => callFn(fn, [acc, cur, idx], frame), + acc + ); +}; + export const V_SBUILTIN_IfElse: SBUILTIN = (node, frame) => { const children = node.children; @@ -59,5 +83,6 @@ export const V_SBUILTIN_IfElse: SBUILTIN = (node, frame) => { export const nameToSBUILTIN: Record = { call: V_SBUILTIN_Call, map: V_SBUILTIN_Map, + reduce: V_SBUILTIN_Reduce, "?": V_SBUILTIN_IfElse, }; -- cgit v1.2.3-70-g09d2