对于以下代码描述有误的是? val data = map(1 -> "one", 2 -> "two") val res = for((k, v) <- data; if(k > 1)) yield v
val rdd=sc.parallelize(array(1,2,3,4,5)) rdd.take(3) 上述语句执行的结果是
类class counter{ var value =0 } ,scala采用类似java中的getter和setter方法,value字段默认定义的方法是?
表达式for(i <- 1 to 3; j <- 1 to 3; if i != j ) {print((10 * i j));print(" ")}输出结果正确的是?
患者,65岁。皮肤、巩膜黄染呈进行性加重,粪便持续变白,病后消瘦明显。应首先考虑的是
val pairrdd1 = sc. parallelize(array(("spark",1),("spark",2),("hadoop",3),("hadoop",5))) val pairrdd2 = sc.parallelize(array(("spark","fast"))) pairrdd1.join(pairrdd2) 上述语句执行以后,pairrdd1这个rdd中所包含的元素是
以下关于rdd的持久化的描述,正确的是
个人理财的目的是为了追求财富最大化。()
scala语言中,下面描述正确的是?
从rdd转换得到dataframe包含两种典型方法,分别是:
qingyi is a role for ____________________.
从太极到两仪,再到四象和八卦,这个生成过程的原则是:
民族关系的特点是由社会的性质和民族关系的性质决定的。
which of the following things does not reflect the character of chinese people in their eating habit and eating process?
双刀的效果是?(多选)
下列选项中全部是太极拳动作的选项是( )
下列哪项不属于路由选择协议的功能?()
药用植物银杏种子入药时称为()。
“志士仁人,无求生以害仁,有杀身以成仁”体现出孔子怎样的生命态度?
people do thorough cleaning on little new year to_______ those ghosts and deities.
what does the chinese dragon symbolize?
pipa was a musical instrument introduced to china in han dynasty.
philologists ide the development of han characters into three distinct stages with the development in the second stage more perfect than that of the first stage.