str() * int == int * str():与自身拼接 int 次,返回拼接后的字符串 4. 查找子字符串(select_elem) 注:… in …、… not in … 函数用法相同 注:str()、bytes()、bytearray() 类型数据用法相同 str() in str():str_1 是 str_2 的子串,返回 True 注:.find、.rfind 用法相同 注:.find 从...
select array_intersect(array(1, 2, 3), array(1, 3, 5)); 示例2:计算ARRAY数组array(10, 20, 20, 30, 30, null, null)和array(30, 30, 20, 20, 40, null, null)的交集,并去掉重复元素。命令示例如下。 --返回[20,30,null]。 select array_intersect(array(10, 20, 20, 30, 30, null...
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tuple() -> empty tuple tuple(iterable) -> tuple initialized from iterable's items t1 = ()# 空元组 t2 = (1,)# 必须有这个逗号 t3 = (1,) *5 t4 = (1,2,3) t5 =1,'a' t6 = (1,2,3,1,2,3) t7 =tuple()# 空元组 t8 =tuple(range(5)) t9 =tuple([1,2,3]) 索引 索...
Getting rid of the second elemnt in a matrix of 2D tuples I would like to know how can I turn this matrix: into: that is, earising the second elements of the tuples that construct my matrix (thus making it a regular matrix of scalars). I would like to know h... ...
从开始学习编程的时候Array就是基础数据结构,也是被使用最频繁的,但是在Erlang中一等公民是List和tuple,在项目中到处都是List的各种处理,但是Array却少见踪迹.好奇心驱使,最近了翻看了一下Array的代码实现. array基础 [1] array可动态扩展大小;可固定大小,可按需自动增长. ...
Tuple Tuple<T1> Tuple<T1,T2> Tuple<T1,T2,T3> Tuple<T1,T2,T3,T4> Tuple<T1,T2,T3,T4,T5> Tuple<T1,T2,T3,T4,T5,T6> Tuple<T1,T2,T3,T4,T5,T6,T7> Tuple<T1,T2,T3,T4,T5,T6,T7,TRest> TupleExtensions Type TypeAccessException TypeCode TypedReference TypeInitializationException TypeLoad...
从开始学习编程的时候Array就是基础数据结构,也是被使用最频繁的,但是在Erlang中一等公民是List和tuple,在项目中到处都是List的各种处理,但是Array却少见踪迹.好奇心驱使,最近了翻看了一下Array的代码实现. array基础 [1] array可动态扩展大小;可固定大小,可按需自动增长. ...
Tuple<T1,T2,T3> Tuple<T1,T2,T3,T4> Tuple<T1,T2,T3,T4,T5> Tuple<T1,T2,T3,T4,T5,T6> Tuple<T1,T2,T3,T4,T5,T6,T7> Tuple<T1,T2,T3,T4,T5,T6,T7,TRest> TupleExtensions Type TypeAccessException TypeCode TypedReference TypeInitializationException TypeLoadException TypeUnloadedException UInt...
json_tuple(STRING jsonStr,p1,p2,..,pn) 对输入的JSON字符串进行处理,合格get_json_object这个UDF类似,不过更高效,其通过一次调用就可以获取多个键值。 parse_url_tuple(url,partname1,partname2,..,partNameN) 其中N>=1,从URL中解析出N个部分信息。其输入参数是:URL,以及多个要抽取的部分的名称。部分名称...