const output = Stream.pull(source, toUpperCase);
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。爱思助手下载最新版本对此有专业解读
We spend a lot of time sourcing the best deals on just about everything, so we know what sells. And you know what really gets the people going? Lego and Pokémon.
示例：nums = [2,1,2,4,3] → res = [4,2,4,-1,-1]。
，这一点在爱思助手下载最新版本中也有详细论述
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return response.text，更多细节参见WPS官方版本下载