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LibJS: Skip undefined and null in join_array_with_separator()

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This it being used in Array.prototype.{join,toString}() - and now
adhering to the spec: [undefined, null].join() === ","
This commit is contained in:
Linus Groh 2020-04-28 23:49:20 +01:00 • committed by Andreas Kling
parent 86810a4b02
commit 6d6cd64689
3 changed files with 10 additions and 2 deletions
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5
Libraries/LibJS/Runtime/ArrayPrototype.cpp
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@ -226,8 +226,9 @@ static Value join_array_with_separator(Interpreter& interpreter, const Array& ar
for (size_t i = 0; i < array.elements().size(); ++i) {
if (i != 0)
builder.append(separator);
if (!array.elements()[i].is_empty())
builder.append(array.elements()[i].to_string());
auto value = array.elements()[i];
if (!value.is_empty() && !value.is_undefined() && !value.is_null())
builder.append(value.to_string());
}
return js_string(interpreter, builder.to_string());
}