Spark DataFrame:value $ is not a member of StringContext df.select($"name", $"age" + 1).show()_value '$' is not a member of stringcontext-CSDN博客网友收藏

Spark DataFrame:value $ is not a member of StringContext df.select($"name", $"age" + 1).show()_value '$' is not a member of stringcontext-CSDN博客

文章浏览阅读3.5k次,点赞5次,收藏2次。错误信息Error:(29, 15) value $ is not a member of StringContext df.select($"name", $"age" + 1).show()解决方案··· //在创建SparkSession之后 import sparkSession.implicits._ ···..._value '$' is not a member o......
阅读全文
getgrnam_[emerg] getgrnam("root")-CSDN博客网友收藏

getgrnam_[emerg] getgrnam("root")-CSDN博客

相关函数:fgetgrent, getrent, getgruid头文件:#include #include 定义函数:strcut group * getgrnam(const char * name);函数说明:getgrnam()用来逐一搜索参数那么指定的组名称, 找到时便将该组的数据以group 结构返回。group结构请参考getgrent()。返......
阅读全文