flag = FileTest::exist?("LochNessMonster")flag = FileTest::exists?("UFO")# exists? is a synonym for exist? OK了
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flag = FileTest::exist?("LochNessMonster")flag = FileTest::exists?("UFO")# exists? is a synonym for exist? OK了
转载于:https://www.cnblogs.com/hitnoah/p/4338361.html