Listing 9 presents a script that iterates the tweets from a particular user (using the user_timeline method), and then for each tweet, extracts the particular day on which the tweet originated.

清单9展示的脚本(使用user _ timeline方法)迭代来自一个特定用户的tweet，然后提取每个tweet生成的日期。

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The execute() method iterates over the list of validators, invoking the execute() method of each validator whose properties match the given form name and the optional element name.

execute() 方法遍历验证器列表，调用每个验证器的 execute() 方法，这些验证器的属性与给定表单的名称和可选元素的名称相匹配。

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The notifyObservers method iterates through the observers, using the foreach method and calls receiveUpdate on each one.

notifyObservers 方法遍历所有的观察者，使用foreach 方法，然后对每一个观察者调用receiveUpdate 方法。

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