Implement Object.groupBy

This commit is contained in:
Ben Noordhuis 2023-11-24 00:48:40 +01:00
parent 52f7524932
commit 3e54403b08
2 changed files with 91 additions and 22 deletions

View file

@ -34377,6 +34377,96 @@ static JSValue js_object_getOwnPropertySymbols(JSContext *ctx, JSValueConst this
JS_GPN_SYMBOL_MASK, JS_ITERATOR_KIND_KEY);
}
static JSValue js_object_groupBy(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
JSValue cb, res, iter, next, groups, k, v, prop;
JSValue args[2];
int64_t idx;
BOOL done;
// "is function?" check must be observed before argv[0] is accessed
cb = argv[1];
if (check_function(ctx, cb))
return JS_EXCEPTION;
// TODO(bnoordhuis) add fast path for arrays but as groupBy() is
// defined in terms of iterators, the fast path must check that
// this[Symbol.iterator] is the built-in array iterator
iter = JS_GetIterator(ctx, argv[0], /*is_async*/FALSE);
if (JS_IsException(iter))
return JS_EXCEPTION;
k = JS_UNDEFINED;
v = JS_UNDEFINED;
prop = JS_UNDEFINED;
groups = JS_UNDEFINED;
next = JS_GetProperty(ctx, iter, JS_ATOM_next);
if (JS_IsException(next))
goto exception;
groups = JS_NewObjectProto(ctx, JS_NULL);
if (JS_IsException(groups))
goto exception;
for (idx = 0; ; idx++) {
v = JS_IteratorNext(ctx, iter, next, 0, NULL, &done);
if (JS_IsException(v))
goto exception;
if (done)
break; // v is JS_UNDEFINED
args[0] = v;
args[1] = JS_NewInt64(ctx, idx);
k = JS_Call(ctx, cb, ctx->global_obj, 2, args);
if (JS_IsException(k))
goto exception;
k = JS_DupValue(ctx, k);
prop = JS_GetPropertyValue(ctx, groups, k);
if (JS_IsException(prop))
goto exception;
if (JS_IsUndefined(prop)) {
prop = JS_NewArray(ctx);
if (JS_IsException(prop))
goto exception;
k = JS_DupValue(ctx, k);
prop = JS_DupValue(ctx, prop);
if (JS_SetPropertyValue(ctx, groups, k, prop,
JS_PROP_C_W_E|JS_PROP_THROW) < 0) {
goto exception;
}
}
res = js_array_push(ctx, prop, 1, &v, /*unshift*/0);
if (JS_IsException(res))
goto exception;
// res is an int64
JS_FreeValue(ctx, prop);
JS_FreeValue(ctx, k);
JS_FreeValue(ctx, v);
prop = JS_UNDEFINED;
k = JS_UNDEFINED;
v = JS_UNDEFINED;
}
JS_FreeValue(ctx, iter);
JS_FreeValue(ctx, next);
return groups;
exception:
JS_FreeValue(ctx, prop);
JS_FreeValue(ctx, k);
JS_FreeValue(ctx, v);
JS_FreeValue(ctx, groups);
JS_FreeValue(ctx, iter);
JS_FreeValue(ctx, next);
return JS_EXCEPTION;
}
static JSValue js_object_keys(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv, int kind)
{
@ -34947,6 +35037,7 @@ static const JSCFunctionListEntry js_object_funcs[] = {
JS_CFUNC_DEF("defineProperties", 2, js_object_defineProperties ),
JS_CFUNC_DEF("getOwnPropertyNames", 1, js_object_getOwnPropertyNames ),
JS_CFUNC_DEF("getOwnPropertySymbols", 1, js_object_getOwnPropertySymbols ),
JS_CFUNC_DEF("groupBy", 2, js_object_groupBy ),
JS_CFUNC_MAGIC_DEF("keys", 1, js_object_keys, JS_ITERATOR_KIND_KEY ),
JS_CFUNC_MAGIC_DEF("values", 1, js_object_keys, JS_ITERATOR_KIND_VALUE ),
JS_CFUNC_MAGIC_DEF("entries", 1, js_object_keys, JS_ITERATOR_KIND_KEY_AND_VALUE ),

View file

@ -23,28 +23,6 @@ test262/test/built-ins/Map/groupBy/negativeZero.js:27: TypeError: not a function
test262/test/built-ins/Map/groupBy/negativeZero.js:27: strict mode: TypeError: not a function
test262/test/built-ins/Map/groupBy/toPropertyKey.js:24: TypeError: not a function
test262/test/built-ins/Map/groupBy/toPropertyKey.js:24: strict mode: TypeError: not a function
test262/test/built-ins/Object/groupBy/callback-arg.js:30: TypeError: not a function
test262/test/built-ins/Object/groupBy/callback-arg.js:30: strict mode: TypeError: not a function
test262/test/built-ins/Object/groupBy/callback-throws.js:20: Test262Error: Expected a Test262Error but got a TypeError
test262/test/built-ins/Object/groupBy/callback-throws.js:20: strict mode: Test262Error: Expected a Test262Error but got a TypeError
test262/test/built-ins/Object/groupBy/emptyList.js:24: TypeError: not a function
test262/test/built-ins/Object/groupBy/emptyList.js:24: strict mode: TypeError: not a function
test262/test/built-ins/Object/groupBy/evenOdd.js:18: TypeError: not a function
test262/test/built-ins/Object/groupBy/evenOdd.js:18: strict mode: TypeError: not a function
test262/test/built-ins/Object/groupBy/groupLength.js:23: TypeError: not a function
test262/test/built-ins/Object/groupBy/groupLength.js:23: strict mode: TypeError: not a function
test262/test/built-ins/Object/groupBy/invalid-property-key.js:22: Test262Error: Expected a Test262Error but got a TypeError
test262/test/built-ins/Object/groupBy/invalid-property-key.js:22: strict mode: Test262Error: Expected a Test262Error but got a TypeError
test262/test/built-ins/Object/groupBy/iterator-next-throws.js:26: Test262Error: Expected a Test262Error but got a TypeError
test262/test/built-ins/Object/groupBy/iterator-next-throws.js:26: strict mode: Test262Error: Expected a Test262Error but got a TypeError
test262/test/built-ins/Object/groupBy/length.js:25: TypeError: cannot convert to object
test262/test/built-ins/Object/groupBy/length.js:25: strict mode: TypeError: cannot convert to object
test262/test/built-ins/Object/groupBy/name.js:25: TypeError: cannot convert to object
test262/test/built-ins/Object/groupBy/name.js:25: strict mode: TypeError: cannot convert to object
test262/test/built-ins/Object/groupBy/null-prototype.js:24: TypeError: not a function
test262/test/built-ins/Object/groupBy/null-prototype.js:24: strict mode: TypeError: not a function
test262/test/built-ins/Object/groupBy/toPropertyKey.js:33: TypeError: not a function
test262/test/built-ins/Object/groupBy/toPropertyKey.js:33: strict mode: TypeError: not a function
test262/test/built-ins/RegExp/lookahead-quantifier-match-groups.js:27: Test262Error: Expected [a, abc] and [a, undefined] to have the same contents. ? quantifier
test262/test/built-ins/RegExp/lookahead-quantifier-match-groups.js:27: strict mode: Test262Error: Expected [a, abc] and [a, undefined] to have the same contents. ? quantifier
test262/test/built-ins/TypedArray/prototype/set/array-arg-targetbuffer-detached-on-get-src-value-no-throw.js:30: TypeError: out-of-bound numeric index (Testing with Float64Array.)