mysql syntax
rename table
alter table equip.history rename to report;
Dart syntax - initSate,Build,deactive, Dispose
☝ initSate(){ super.initSate //放置一旦載入statefulwidget後就不需一直更新的物件。 } 如字面的意思in it sate. 此功能好比statefulwidget 裡面的statelesswidget。 Called only once when the widget is created，只會執行一次，不像build() 一變動就自毀後重建。 ☝Build(BuildContext context) { //放置載入後每次有任何變動就需更新的物件。 } - Build the widget tree -A build is triggred every time we use setState() that re-triggre build(). ☝ deactive() {super.deactive // 放置當statefulwight自毀換頁前跟著毀的物件。例如:釋放記憶空間。 } ☝Dispose() - When the widget/state object is removed.
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