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问题

遇到 redefinition; different basic types怎么解决?c报错

爱吃鱼的程序员 2020-05-28 18:09:53 12 浏览量 回答数 1

问题

zookeeper事件监听机制

montos 2020-04-20 18:28:11 4 浏览量 回答数 1

回答

Does the solution already exist: check whether the pods are on the same instanceTypes' ECS. c6 ~= 1.15 * c5 Different instanceType of ECS may cause the load different when the pod is about computing.

因为相信,所以看见。 2020-07-18 09:51:23 0 浏览量 回答数 0

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问题

java mybatie问题,再传map参数里面是list的时候,总是报传进去的参数为空:配置报错 

kun坤 2020-06-04 10:24:36 3 浏览量 回答数 1

问题

(急)通用mapper3.4,根据主键查询或删除报错,类型转换出错或者不能识别主键?报错

爱吃鱼的程序员 2020-06-08 13:29:16 0 浏览量 回答数 1

回答

在clone数组上调用该方法时,它将返回对新数组的引用,该新数组包含(或引用)与源数组相同的元素。 因此,在您的示例中,int[] a是在堆上创建的单独的对象实例,并且int[] b是在堆上创建的单独的对象实例。(记住所有数组都是对象)。 int[] a = {1,2,3}; int[] b = a.clone(); System.out.println(a == b ? "Same Instance":"Different Instance"); //Outputs different instance 如果要修改,int[] b则更改将不会反映出来,int[] a因为这两个对象是单独的对象实例。 b[0] = 5; System.out.println(a[0]); System.out.println(b[0]); //Outputs: 1 // 5 当源数组包含对象时,这会变得稍微复杂一些。该clone方法将返回对新数组的引用,该数组引用与源数组相同的对象。 所以如果我们上课Dog... class Dog{ private String name; public Dog(String name) { super(); this.name = name; } public String getName() { return name; } public void setName(String name) { this.name = name; } } 然后创建并填充类型为Dog... 的数组 Dog[] myDogs = new Dog[4]; myDogs[0] = new Dog("Wolf"); myDogs[1] = new Dog("Pepper"); myDogs[2] = new Dog("Bullet"); myDogs[3] = new Dog("Sadie"); 然后克隆狗... Dog[] myDogsClone = myDogs.clone(); 数组引用相同的元素... System.out.println(myDogs[0] == myDogsClone[0] ? "Same":"Different"); System.out.println(myDogs[1] == myDogsClone[1] ? "Same":"Different"); System.out.println(myDogs[2] == myDogsClone[2] ? "Same":"Different"); System.out.println(myDogs[3] == myDogsClone[3] ? "Same":"Different"); //Outputs Same (4 Times) 这意味着,如果我们修改通过克隆数组访问的对象,则更改将在我们访问源数组中的同一对象时反映出来,因为它们指向相同的引用。 myDogsClone[0].setName("Ruff"); System.out.println(myDogs[0].getName()); //Outputs Ruff 但是,对数组本身的更改只会影响该数组。 myDogsClone[1] = new Dog("Spot"); System.out.println(myDogsClone[1].getName()); System.out.println(myDogs[1].getName()); //Outputs Spot // Pepper 如果您通常了解对象引用的工作方式,那么很容易理解克隆和修改如何影响对象数组。为了进一步了解参考文献和原语,建议您阅读这篇出色的文章。

保持可爱mmm 2020-02-09 14:02:04 0 浏览量 回答数 0

回答

有几种解决该问题的方法: Flatten the structure. If you presume that processing of the flat table will work faster, it might make sense to flatten your structure into the plain list of class or struct instances, and then process the plain list.If the structure is uniform across levels (even if the names are different on each level), you can use simple recursion. You would have the function which will check if the item on certain level has children, and call itself with each of those children if they are present, or call the data processing function for the final level entries. If subcomponent names differ, you can have an array of such names that would say "on level 1 the items are called 'comp*, on level 2 - 'subcomp* and so on.If levels require completely different handling, introduce separate functions for each level. 回答来源:stackoverflow

is大龙 2020-03-24 23:27:50 0 浏览量 回答数 0

问题

通用Mapper插入时处理Null字段有什么好办法:报错

kun坤 2020-06-14 15:46:03 0 浏览量 回答数 1

问题

通用Mapper插入时处理Null字段有什么好办法 - mybatis报错

montos 2020-06-03 21:54:51 3 浏览量 回答数 1

问题

通用Mapper插入时处理Null字段有什么好办法:配置报错 

kun坤 2020-06-02 15:04:00 1 浏览量 回答数 1

回答

这个叫 DNS轮询(Round-robin DNS),是一种简单的负载均衡技术,维基百科上有详细介绍:http://en.wikipedia.org/wiki/Round-robin_DNS文中说道:With each DNS response, the IP address sequence in the list isUsually, basic IP clients attempt connections with the firstreturned from a DNS query so that on different connectionattempts clients would receive service from different providers, thusdistributing the overall load among servers.你的两个问题,答案都在其中:DNS服务器在收到每个请求时,都会重新(随机)排序多个IP,然后返回给客户端。这就是你观察到的每次返回的IP顺序不一样。这样做的原因是负载均衡,因为客户端很可能默认选取DNS服务器返回的第一个IP来建立连接,如果每次返回的IP顺序都一样,所有流量都跑到第一个IP上去了,失去了负载均衡的意义。当然也有聪明的客户端会从DNS返回的IP列表中随机选取一个建立连接,但这与服务端的随机顺序并不冲突,服务端这样做兼容了【默认选取第一个IP】的客户端。

a123456678 2019-12-02 02:35:54 0 浏览量 回答数 0

问题

post请求返回302是什么问题

游客irm3nny572smk 2019-12-01 19:36:12 628 浏览量 回答数 1

问题

Domain

1715816614511716 2019-12-01 19:03:23 217 浏览量 回答数 1

问题

捕获异常后抛出另外的异常

景凌凯 2020-04-19 21:01:58 1 浏览量 回答数 1

问题

打开Eclipse提示“The default workspace “xxxx” --java报错

montos 2020-05-28 16:32:10 3 浏览量 回答数 1

回答

--try an update update tablename set field1 = 'new value', field2 = 'different value', ... where idfield = 7 --insert if failed if @@rowcount = 0 and @@error = 0 insert into tablename ( idfield, field1, field2, ... ) values ( 7, 'value one', 'another value', ... ) 如果是更新,则减少为一个IO操作,如果是插入则为两个。 MS Sql2008 merge从SQL:2003标准引入: merge tablename as target using (values ('new value', 'different value')) as source (field1, field2) on target.idfield = 7 when matched then update set field1 = source.field1, field2 = source.field2, ... when not matched then insert ( idfield, field1, field2, ... ) values ( 7, source.field1, source.field2, ... )

保持可爱mmm 2019-12-02 03:15:18 0 浏览量 回答数 0

问题

配置阿里云账号出错

往后 2020-09-18 16:11:41 0 浏览量 回答数 0

问题

服务器返回代码“302 Found,The requested resource resides t

保持可爱mmm 2020-03-27 17:10:32 0 浏览量 回答数 1

回答

spring boot 2 官方文档,自己找下   ```yml # DATASOURCE (DataSourceAutoConfiguration & DataSourceProperties) spring.datasource.continue-on-error=false # Whether to stop if an error occurs while initializing the database. spring.datasource.data= # Data (DML) script resource references. spring.datasource.data-username= # Username of the database to execute DML scripts (if different). spring.datasource.data-password= # Password of the database to execute DML scripts (if different). spring.datasource.dbcp2.*= # Commons DBCP2 specific settings spring.datasource.driver-class-name= # Fully qualified name of the JDBC driver. Auto-detected based on the URL by default. spring.datasource.generate-unique-name=false # Whether to generate a random datasource name. spring.datasource.hikari.*= # Hikari specific settings spring.datasource.initialization-mode=embedded # Initialize the datasource with available DDL and DML scripts. spring.datasource.jmx-enabled=false # Whether to enable JMX support (if provided by the underlying pool). spring.datasource.jndi-name= # JNDI location of the datasource. Class, url, username & password are ignored when set. spring.datasource.name= # Name of the datasource. Default to "testdb" when using an embedded database. spring.datasource.password= # Login password of the database. spring.datasource.platform=all # Platform to use in the DDL or DML scripts (such as schema-${platform}.sql or data-${platform}.sql). spring.datasource.schema= # Schema (DDL) script resource references. spring.datasource.schema-username= # Username of the database to execute DDL scripts (if different). spring.datasource.schema-password= # Password of the database to execute DDL scripts (if different). spring.datasource.separator=; # Statement separator in SQL initialization scripts. spring.datasource.sql-script-encoding= # SQL scripts encoding. spring.datasource.tomcat.*= # Tomcat datasource specific settings spring.datasource.type= # Fully qualified name of the connection pool implementation to use. By default, it is auto-detected from the classpath. spring.datasource.url= # JDBC URL of the database. spring.datasource.username= # Login username of the database. spring.datasource.xa.data-source-class-name= # XA datasource fully qualified name. spring.datasource.xa.properties= # Properties to pass to the XA data source. ```  ###### 不同类型的数据库连接池读取的配置参数名不同,springboot如果没有指定数据库连接池,默认使用tomcat-jdbc连接池,其连接池参数配置: spring.datasource.max-wait=10000######我意思是,有些资料(yml写法)写的是spring:datasource:maxWait,有些又写的是spring:datasource:max-wait,所以到底哪个才是正确的配置写法###### 这跟版本有关系的大兄dei###### 这个和yml文件没关系的,和spring boot中@ConfigurationProperties注解有关

montos 2020-05-31 19:40:55 0 浏览量 回答数 0

回答

spring boot 2 官方文档,自己找下   ```yml # DATASOURCE (DataSourceAutoConfiguration & DataSourceProperties) spring.datasource.continue-on-error=false # Whether to stop if an error occurs while initializing the database. spring.datasource.data= # Data (DML) script resource references. spring.datasource.data-username= # Username of the database to execute DML scripts (if different). spring.datasource.data-password= # Password of the database to execute DML scripts (if different). spring.datasource.dbcp2.*= # Commons DBCP2 specific settings spring.datasource.driver-class-name= # Fully qualified name of the JDBC driver. Auto-detected based on the URL by default. spring.datasource.generate-unique-name=false # Whether to generate a random datasource name. spring.datasource.hikari.*= # Hikari specific settings spring.datasource.initialization-mode=embedded # Initialize the datasource with available DDL and DML scripts. spring.datasource.jmx-enabled=false # Whether to enable JMX support (if provided by the underlying pool). spring.datasource.jndi-name= # JNDI location of the datasource. Class, url, username & password are ignored when set. spring.datasource.name= # Name of the datasource. Default to "testdb" when using an embedded database. spring.datasource.password= # Login password of the database. spring.datasource.platform=all # Platform to use in the DDL or DML scripts (such as schema-${platform}.sql or data-${platform}.sql). spring.datasource.schema= # Schema (DDL) script resource references. spring.datasource.schema-username= # Username of the database to execute DDL scripts (if different). spring.datasource.schema-password= # Password of the database to execute DDL scripts (if different). spring.datasource.separator=; # Statement separator in SQL initialization scripts. spring.datasource.sql-script-encoding= # SQL scripts encoding. spring.datasource.tomcat.*= # Tomcat datasource specific settings spring.datasource.type= # Fully qualified name of the connection pool implementation to use. By default, it is auto-detected from the classpath. spring.datasource.url= # JDBC URL of the database. spring.datasource.username= # Login username of the database. spring.datasource.xa.data-source-class-name= # XA datasource fully qualified name. spring.datasource.xa.properties= # Properties to pass to the XA data source. ```  ###### 不同类型的数据库连接池读取的配置参数名不同,springboot如果没有指定数据库连接池,默认使用tomcat-jdbc连接池,其连接池参数配置: spring.datasource.max-wait=10000######我意思是,有些资料(yml写法)写的是spring:datasource:maxWait,有些又写的是spring:datasource:max-wait,所以到底哪个才是正确的配置写法###### 这跟版本有关系的大兄dei###### 这个和yml文件没关系的,和spring boot中@ConfigurationProperties注解有关

kun坤 2020-06-07 22:42:02 0 浏览量 回答数 0

回答

div.checkbox label input(type="checkbox") | Check me out Plain TextJade provides three common ways of getting plain text. They are useful in different situations http://jade-lang.com/reference/plain-text/

杨冬芳 2019-12-02 02:54:36 0 浏览量 回答数 0

回答

应该是和下面一样的问题,加了-ffloat-store就好了。用-O0也不会错。http://stackoverflow.com/questions/7517588/different-floating-point-result-with-optimization-enabled-compiler-bug

西秦说云 2019-12-02 02:38:58 0 浏览量 回答数 0

回答

楼主。看了你的错误信息,很明显根据提示可以知道,错误error C2371: ‘xxx’ : redefinition; different basic types,定义变量、数组等时重名

爱吃鱼的程序员 2020-05-29 13:59:34 0 浏览量 回答数 0

回答

楼主。看了你的错误信息,很明显根据提示可以知道,错误error C2371: ‘xxx’ : redefinition; different basic types,定义变量、数组等时重名

爱吃鱼的程序员 2020-05-28 17:31:25 0 浏览量 回答数 0

问题

我怎么在阿里云添加job

1490641658824710 2019-12-01 19:15:42 104 浏览量 回答数 0

回答

建议改变:chars = set()for character in characters:if character not in chars: chars.add(character)至:chars = set()charsadd = chars.add # new line herefor character in characters:if character not in chars: charsadd(character) # this line is different - no method lookup now

一码平川MACHEL 2019-12-02 01:53:49 0 浏览量 回答数 0

回答

" <a href=""https://docs.spring.io/spring-boot/docs/2.0.0.RELEASE/reference/htmlsingle/"" rel=""nofollow"">spring boot 2 官方文档,自己找下   ```yml # DATASOURCE (DataSourceAutoConfiguration & DataSourceProperties) spring.datasource.continue-on-error=false # Whether to stop if an error occurs while initializing the database. spring.datasource.data= # Data (DML) script resource references. spring.datasource.data-username= # Username of the database to execute DML scripts (if different). spring.datasource.data-password= # Password of the database to execute DML scripts (if different). spring.datasource.dbcp2.*= # Commons DBCP2 specific settings spring.datasource.driver-class-name= # Fully qualified name of the JDBC driver. Auto-detected based on the URL by default. spring.datasource.generate-unique-name=false # Whether to generate a random datasource name. spring.datasource.hikari.*= # Hikari specific settings spring.datasource.initialization-mode=embedded # Initialize the datasource with available DDL and DML scripts. spring.datasource.jmx-enabled=false # Whether to enable JMX support (if provided by the underlying pool). spring.datasource.jndi-name= # JNDI location of the datasource. Class, url, username & password are ignored when set. spring.datasource.name= # Name of the datasource. Default to "testdb" when using an embedded database. spring.datasource.password= # Login password of the database. spring.datasource.platform=all # Platform to use in the DDL or DML scripts (such as schema-${platform}.sql or data-${platform}.sql). spring.datasource.schema= # Schema (DDL) script resource references. spring.datasource.schema-username= # Username of the database to execute DDL scripts (if different). spring.datasource.schema-password= # Password of the database to execute DDL scripts (if different). spring.datasource.separator=; # Statement separator in SQL initialization scripts. spring.datasource.sql-script-encoding= # SQL scripts encoding. spring.datasource.tomcat.*= # Tomcat datasource specific settings spring.datasource.type= # Fully qualified name of the connection pool implementation to use. By default, it is auto-detected from the classpath. spring.datasource.url= # JDBC URL of the database. spring.datasource.username= # Login username of the database. spring.datasource.xa.data-source-class-name= # XA datasource fully qualified name. spring.datasource.xa.properties= # Properties to pass to the XA data source. ```  ###### 不同类型的数据库连接池读取的配置参数名不同,springboot如果没有指定数据库连接池,默认使用tomcat-jdbc连接池,其连接池参数配置: spring.datasource.max-wait=10000######我意思是,有些资料(yml写法)写的是spring:datasource:maxWait,有些又写的是spring:datasource:max-wait,所以到底哪个才是正确的配置写法###### 这跟版本有关系的大兄dei###### 这个和yml文件没关系的,和spring boot中@ConfigurationProperties注解有关 "

montos 2020-05-31 10:59:19 0 浏览量 回答数 0

问题

sys_fork in Linux about the stack base

杨冬芳 2019-12-01 20:24:23 1032 浏览量 回答数 0

问题

在SSH2框架下mysql增加事物,不能修改数据的问题

落地花开啦 2019-12-01 19:50:09 971 浏览量 回答数 1

问题

nginx启动报错,不知道怎么解决,求帮助?报错

爱吃鱼的程序员 2020-06-09 11:17:29 0 浏览量 回答数 1
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