local data = _objectWrappers:wrap(_arrays:arrayOf(_plugins:loadClass("java.lang.String"), "one", nil, "three", "four",
        nil))
-- 将非空字符串转换为其长度，并添加索引信息, 带索引的非空字符串长度: [0_3, 2_5, 3_4]
data:mapIndexedNotNull(function(index, word)
    if (word ~= nil) then
        return index .. "_" .. _objectWrappers:wrap(word):count()
    else
        return nil
    end
end):forEach(function(it)
    _console:log(it)
end)