In [101]: print(len(ret)) 3 In [102]: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. sub 将匹配到的数据进行替换 例如将上面的smoke进行替换为hello AI检测代码解析 In [104]: ret = re.sub(r"smoke","hello",str1) In [105]: print(ret) asdjkasldkjhellolaksjdklasjdlahellol;kajsdlk...
class java.util.Arrays$ArrayList cannot be cast to class java.lang.String (java.util.Arrays$ArrayList and java.lang.String are in module java.base of loader 'bootstrap') java.lang.ClassCastException: class java.util.Arrays$ArrayList cannot be cast to class java.lang.String (java.util.Arrays...
查询嵌套在数组中的文档查询 instock 数组中包含 { warehouse: "A", qty: 5 } 的所有文档 > db.inventory.find( { "instock": {...,如果不知道文档的准确索引值,只能按照以下格式数组字段名.文档字段名 instock.qty 使用数组索引查询嵌入...
import java.util.Random; public class Main { private static double testUF(UF uf,int m ){ int size=uf.getSize(); Random random =new Random(); long startTime=System.nanoTime(); for(int i=0;i int a=random.nextInt(size); int b=random.nextInt(size); uf.unionElements(a, b); } ...