从Map上删除所有数据。

clear - 语法

Map.clear()

clear - 示例

void main() { 
   Map m={'name':'Learnfk','Id':'E1001'}; 
   print('Map :${m}'); 
   
   m.clear(); 
   print('Map after invoking clear()  :${m}'); 
}

它将产生以下输出-

Map :{name: Learnfk, Id: E1001} 
Map after invoking clear()  :{}

参考链接

https://www.learnfk.com/dart-programming/dart-programming-map-function-clear.html