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C) Initial understanding of UML. This is a tool for learning design patterns. In the early days, you could even only know the relevant diagrams of BlueJ, which took 10 minutes.Next, we will listen to the onchange event in the drop-down box of colorSelect and the oninput event in the numberInput input box respectively, and then make corresponding processing in these two events.他还真怕花生和玉米没轻重，仗势欺人。《高校英雄传》（英语：Campus Heroes），2018年三立华人电视剧周日十点档系列的第四十四部作品，接档《三明治女孩的逆袭》。本剧由罗宏正、刘宇菁、黄镫辉、黄甄妮领衔主演，王牌娱乐、聚星文创娱乐共同制作，并与醒吾科技大学进行产学合作，部分学生由表演艺术系饰演。本剧讲述丰川高中，有着来自四面八方的学生，他们自诩是英雄豪杰。陆大翔（罗宏正饰），原是一名职棒选手，他因缘际会下来到丰川高中，当上了三年八班的导师，原本不被众多老师看好的他，却能因材施教解决了学生一连串的问题，因此被学生们奉为偶像“英雄”，也与冤家辅导室老师唐可欣（刘宇菁饰）成为了恋人。但就在严世藩死后不久，一封家书竟然传到了苔湾。Iterator pattern provides a way to access each element in a collection object sequentially without exposing the internal representation of the object, which can not only not expose the internal structure of the collection, but also allow external code to transparently access the internal elements of the collection. The specific structure diagram is shown below.Add under [mysqld]