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LibJS: Make Array.prototype.includes() generic

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This commit is contained in:
Linus Groh 2020-05-23 11:40:20 +01:00 • committed by Andreas Kling
parent e78bc2f6fd
commit 92fd140cb2
2 changed files with 21 additions and 16 deletions
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29
Libraries/LibJS/Runtime/ArrayPrototype.cpp
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@ -557,35 +557,32 @@ Value ArrayPrototype::last_index_of(Interpreter& interpreter)
Value ArrayPrototype::includes(Interpreter& interpreter)
{
auto* array = array_from(interpreter);
if (!array)
auto* this_object = interpreter.this_value().to_object(interpreter);
if (!this_object)
return {};
i32 array_size = array->elements().size();
if (array_size == 0)
i32 length = get_length(interpreter, *this_object);
if (interpreter.exception())
return {};
if (length == 0)
return Value(false);
i32 from_index = 0;
if (interpreter.argument_count() >= 2) {
from_index = interpreter.argument(1).to_i32(interpreter);
if (interpreter.exception())
return {};
if (from_index >= array_size)
if (from_index >= length)
return Value(false);
auto negative_min_index = ((array_size - 1) * -1);
if (from_index < negative_min_index)
from_index = 0;
else if (from_index < 0)
from_index = array_size + from_index;
if (from_index < 0)
from_index = max(length + from_index, 0);
}
auto value_to_find = interpreter.argument(0);
for (i32 i = from_index; i < array_size; ++i) {
auto& element = array->elements().at(i);
for (i32 i = from_index; i < length; ++i) {
auto element = this_object->get_by_index(i).value_or(js_undefined());
if (interpreter.exception())
return {};
if (same_value_zero(interpreter, element, value_to_find))
return Value(true);
}
return Value(false);
}