That return statement will stop the execution of each and return from find_mod_2. If this was another language, or if each was implemented with a Proc rather than a yield, you would have to return a special value to indicate you wanted to stop, or raise an exception. This is how Crystal gets away with having no for loop in the language.4 Otherwise the block would simply cede control to the method that called it.
If it’s hard to break the circular dependency, it might be a sign that two or more modules should be merged.
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而当伊朗防空系统被瘫痪和廓清后，F-35I便降低隐形要求，外部挂载弹药，和F-15、F-16等战机执行类似的精确打击任务。唯一不同的是，拥有先进传感器的F-35I还兼顾情报收集（例如拍摄目标区域的照片和规划攻击路线等），在预警机、电子战飞机和空中加油机保障下对伊朗实施不间断的“穿透式打击”。
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