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Code Review 方法论与实践总结梳理_javascript技巧_脚本之家
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 private static final String MONEY_DISPLAY_TEXT_PATTERN = "%s %s"; private BillVO convertBillDTO2BillVO(BillDTO billDTO) { if (billDTO == null) { return null; } BillVO billVO = new BillVO(); billVO.setCostDisplayText(buildMoney...
www.jb51.net/article/2745...htm 2025-3-19
postgresql insert into select无法使用并行查询的解决_PostgreSQL_脚 ...
-> Parallel Seq Scan on test1 t2 (cost=0.00..8591.67 rows=416667 width=4) (actual time=0.032..104.804 rows=333333 loops=3) Planning Time: 0.420 ms Execution Time: 715.447 ms (13 rows)可以看到走了两个Workers。下边看一下insert into select:1...
www.jb51.net/article/2037...htm 2025-3-20
python numpy中multiply与*及matul 的区别说明_python_脚本之家
1 2 3 4 5 6 7 8 9 10 11 12 13 14 def gradientDescent(X,y,theta,alpha,iteration): colunms = int(theta.ravel().shape[1]) thetai = np.matrix(np.zeros(theta.shape)) cost = np.zeros(iteration) for i in range(iteration): error = X*theta.T-y for j in range(colunms): a ...
www.jb51.net/article/2133...htm 2025-3-21
Java字符串拼接的五种方法及性能比较分析(从执行100次到90万次)_java...
{list.add("a")} cost1=0 ms {StringUtils.join(list, "")} cost=20 ms >>> testStringBuffer() <<< {strBuffer.append("a")} cost=0 ms >>> testStringBuilder() <<< {strBuilder.append("a")} cost=0 ms3. 执行1万次, private static final int max = 10000;1...
www.jb51.net/article/2321...htm 2025-3-20
Oracle中使用DBMS_XPLAN处理执行计划详解_oracle_脚本之家
3.COST – 显示优化器计算的成本信息 4.PARTITION – 显示分区的分割信息 5.PARALLEL – 显示并行执行信息 6.PREDICATE – 显示谓语 7.PROJECTION – 显示列投影部分(每一行的那些列被传递给其父列已经这些列的大小) 8.ALIAS – 显示查询块名称已经对象别名 ...
www.jb51.net/article/522...htm 2025-3-8
四种Golang实现middleware框架的方式小结_Golang_脚本之家
1 2 3 4 5 6 7 8 9 10 fmt.Println("===方案四 begin") ctx = context.Background() middleware4 := middlewarefor.NewMiddlewareManager( middlewarefor.RecoveryMW, middlewarefor.LoggerMW, middlewarefor.TimeCostMW, ) middleware4.Exec(ctx) fmt.Println("===方案四 end") 结果 ===方案四 begin...
www.jb51.net/jiaoben/318395d...htm 2025-3-12
网络基础版各种命令行集锦_网络编程_脚本之家
switch(enable) set spantree portcost moudle/port cost switch(enable) set spantree portvlancost moudle/port [cost cost][vlan-list] 16.在基于IOS的交换机上调整端口ID: switch(config-if)# spanning-tree[vlan vlan-list]port-priority port-priority 在基于CLI的交换机上调整端口ID: switch(enable) set...
www.jb51.net/article/119...htm 2025-3-18
PGSQL查询最近N天的数据及SQL语句实现替换字段内容_PostgreSQL_脚本之家
cost 1 language internal as $$begin -- missing source code end;$$; comment on function replace(text, text, text) is 'replace all occurrences in string of old_substr with new_substr';3、SQL将查询结果赋值1 2 3 4 --查询表数据,给test_content字段并赋值 select test_id,test_code,'测试数据...
www.jb51.net/article/2771...htm 2025-3-21
Golang常用的几种密码加密方式分享_Golang_脚本之家
1 2 3 4 5 6 7 8 // HashPassword 使用 Bcrypt 算法生成密码哈希值 func HashPassword(password string) (string, error) { hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost) if err != nil { return "", err } return string(hashedPassword), nil } 验证...
www.jb51.net/jiaoben/296033y...htm 2025-3-4