exit(1) } if (IS_DIR(CMAKE_BINARY_DIR)) { echo("CMake binary is in the expected location.") build() } 这个例子将在构建 CMake 项目时检查是否将 CMAKE_BINARY_DIR 设置为正确的位置。如果该目录不存在或者不是编译器编写的目录,则会输出一条错误消息并退出。否则,将构建项目。
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if (CollectionUtils.isNotEmpty(list)) { // do something } else { return xxx; } 使用尽早返回优化: if (CollectionUtils.isEmpty(list)) { return xxx; } // do something 可以看到,优化后的代码不仅节省了一个 else 语句,也能让后续的 "do something" 节省一层 if else 包裹,代码看起来更干净一些...
public, vectors'-c logging_collector=on-c max_wal_size=2GB-c shared_buffers=512MB-c wal_compression=onrestart:alwayspower-tools:container_name:immich_power_toolsimage:ghcr.io/va
= null && !...= null) { System.out.println("list不为空"); } else { System.out.println("list为空"); } 上面一段代码是错误...=null 首先判断是否有商店, 而!list.isEmpty()则没有先判断商店是否存在,而是直接判断商店是否有商品。...list.isEmpty()){ System.out.println("list不为空")...
Error message is: There is not enough space on the disk. An error occurred while the batch was being executed. An explicit value for the identity column in table 'Calculation' can only be specified when a column list is used and IDENTITY_INSERT is ON. An invalid floating point operation ...
list.isEmpty() 和 list.size()==0 有啥区别呢?答案:没有区别 。 isEmpty()判断有没有元素,而size()返回有几个元素, 如果判断一个集合有无元素 建议用isEmpty()方法.比较符合逻辑用法。 但是直接调用可以会报 nullException。list可能不存在。
LIST_HEAD(wrk); /* * Limit the number of linkwatch events to one * per second so that a runaway driver does not * cause a storm of messages on the netlink * socket. This limit does not apply to up events * while the device qdisc is down. ...
Verify that the TargetServerURL is valid and that you have the correct permissions to connect to the report server. Could not create a list of fields for the query Could not establish trust relationship for the SSL/TLS secure channel. Could not execute procedure on remote server 'repl_...
syncrepl crash if attribute list is non-empty #1134 389-ds-bot opened this issue on Sep 13, 2020· 13 comments Comments 389-ds-bot commented on Sep 13, 2020 Cloned from Pagure issue: https://pagure.io/389-ds-base/issue/47803 Created at 2014-05-14 21:34:06 by pspacek Closed as...