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LibJS: Add the TypedArray.prototype.join method

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Idan Horowitz 2021-06-17 18:25:49 +03:00 • committed by Linus Groh
parent 2922a6c053
commit 57db27bcc4
2 changed files with 34 additions and 0 deletions
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33
Userland/Libraries/LibJS/Runtime/TypedArrayPrototype.cpp
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@ -32,6 +32,7 @@ void TypedArrayPrototype::initialize(GlobalObject& object)
define_native_function(vm.names.findIndex, find_index, 1, attr);
define_native_function(vm.names.forEach, for_each, 1, attr);
define_native_function(vm.names.some, some, 1, attr);
define_native_function(vm.names.join, join, 1, attr);
define_native_accessor(vm.well_known_symbol_to_string_tag(), to_string_tag_getter, nullptr, Attribute::Configurable);
}
@ -197,6 +198,38 @@ JS_DEFINE_NATIVE_FUNCTION(TypedArrayPrototype::some)
return Value(result);
}
// 23.2.3.15 %TypedArray%.prototype.join ( separator ), https://tc39.es/ecma262/#sec-%typedarray%.prototype.join
JS_DEFINE_NATIVE_FUNCTION(TypedArrayPrototype::join)
{
auto typed_array = typed_array_from(vm, global_object);
if (!typed_array)
return {};
auto length = typed_array->array_length();
String separator = ",";
if (!vm.argument(0).is_undefined()) {
separator = vm.argument(0).to_string(global_object);
if (vm.exception())
return {};
}
StringBuilder builder;
for (size_t i = 0; i < length; ++i) {
if (i > 0)
builder.append(separator);
auto value = typed_array->get(i).value_or(js_undefined());
if (vm.exception())
return {};
if (value.is_nullish())
continue;
auto string = value.to_string(global_object);
if (vm.exception())
return {};
builder.append(string);
}
return js_string(vm, builder.to_string());
}
// 23.2.3.1 get %TypedArray%.prototype.buffer, https://tc39.es/ecma262/#sec-get-%typedarray%.prototype.buffer
JS_DEFINE_NATIVE_GETTER(TypedArrayPrototype::buffer_getter)
{

1
Userland/Libraries/LibJS/Runtime/TypedArrayPrototype.h
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@ -31,6 +31,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(find_index);
JS_DECLARE_NATIVE_FUNCTION(for_each);
JS_DECLARE_NATIVE_FUNCTION(some);
JS_DECLARE_NATIVE_FUNCTION(join);
};
}