The observer mode defines a one-to-many dependency relationship, allowing multiple observer objects to monitor a certain topic object at the same time. When the state of this topic object changes, all observer objects will be notified so that they can automatically update their behaviors. The specific structure diagram is as follows:
众人哄笑道：难道京城的鸡也不好？秦枫看着他们兴奋的样子，失笑道：看来郑大叔和婶子他们真是算准了你们。
讲述天上财神欧阳震华坚持金钱在凡间是万能，更与相信“情比金坚”的寿星公打赌，要改变凡人杨西。
创世纪超强科幻短片《如斯星球》
该剧于大年初六在横店正式开机。
一路上旌旗蔽日，士气如虹，好不威武。
越军哪里是被困在临淄城外，受到牵制动弹不得。
门外的百姓们反响最大。
I hope everyone can consider choosing artisans and weapons with different tastes according to their own outfits.
尼玛，本以为《寻秦记》就是一部非常轻松愉快的爽文，没有想到竟然这么烧脑。
Wenchuan suddenly freed Huang Weiping from the self-pity of having no worries about food and clothing and middle-aged anxiety. Although the mantra used to be "it's not interesting to live", he realized that he had never really thought about death. "Only when we realize death can we enter the true life. This is the so-called living to death."
Entrepreneur Ling Jun told the story of two employees of his company. The two employees are classmates he recruited at the same time.
在这个烹饪方式花样繁多的时代，烧烤成为了一把打开人类先...
但你先偷袭黎章，后弃袍泽于不顾，本将军还是要处罚你。
方夫人对刘氏笑道：郑夫人听他这话，可笑不可笑？转向方威，我训你？你自己的前程，自己不经心，也不能怪人。
与世间充满的“恋爱电影”不同，非闪亮系·青春恋爱喜剧。
从山东农村考到上海的曹可陈（夏雨饰），结识了来自重庆的辣妹子丛小明（梅婷饰），这对经历爱情走向婚姻的新婚夫妻面临着来自有着不同生活背景的双方家庭，以及房子、车子等诸多物质欲求的种种考验。一个在来自农村的哥嫂和父母与妻子丈母娘的矛盾中辛苦挣扎，心怀梦想忍辱负重，蛰伏八年终圆梦；一个则面临在怀孕生子期间岗位不断被同事垂涎，被老妈和丈夫之间的矛盾搞得焦头烂额，但是在爱情的支撑下最终成为丈夫的精神支柱；曹可陈与丛小明组建家庭后的生活琐事也许远远不止是工作、事业，更多的则是不同的生活背景在现实生活中所衍生的重重矛盾……
Note: The above codes are all done according to the book. They all read the code of the book. The most important thing is that we understand the implementation of the policy mode. For example, the above form verification function is the code packaged in this way. We usually use JQuery plug-in form verification code to be packaged in this way. Therefore, we can also use this method to package forms and other learning in the future.
那个张姑娘用一只鹅毛管子蘸墨水写字，写得那叫一个快哟。
故事围绕李大为（张若昀 饰）、夏洁（白鹿 饰）、杨树（徐开骋 饰）、赵继伟（曹璐 饰）四个初出茅庐的见习警员展开，讲述了他们在“警情高发”的平陵市八里河派出所历经各类案件洗礼，并在老警察的言传身教下迅速成长，最终成为合格的人民警察的故事。
