Java8中将list转换为用逗号隔开的字符串的几种方法 1.使用谷歌的Joiner转换 public static String parseListToStr(List list){ String result = Joiner.on...(",").join(list); return result; } 2.使用lambda表达式遍历集合 public static String parseListToStr2...stream流实现 public static String pars...
1 print(",".join(strings)) or in Scala: 1 println(strings.mkString(",")) It’s pretty sad that you have to either write that ugly mess, or turn to something like Apache StringUtils. Different treatment of primitives and objects It is a lot harder to deal with variable length collec...
We can join a list of strings withmkString. main.scala @main def main() = val words = List("work", "sky", "place", "cup") val joined = words.mkString(" ") println(joined) val joined2 = words.mkString(", ") println(joined2) In the example, we joing a list of strings into...
Program to concatenate two lists of strings to one using ::: operator –object MyClass { def main(args: Array[String]) { // creating Lists val bikes1 = List("RE ThunderBird 350" , "YRF R3") val bikes2 = List("HD Iron 883" , "BMW S1000RR") //Printing the Lists println("...
executeInsert(str.+) // insertion returns a list of at least one string keysSince Scala supports multi-line strings, feel free to use them for complex SQL statements:val sqlQuery = SQL( """ select * from Country c join CountryLanguage l on l.CountryCode = c.Code where c.code = '...
This book provides astep-by-stepguide for thecomplete beginnerto learn Scala. It is particularly useful to programmers, data scientists, big data engineers, students, or just about anyone who wants toget up to speed fastwith Scala (especially within an enterprise context). You get to build a...
Scala - How to convert a Seq[A] to a Map[Int, A] using a value of A as the key in the map? Scala - How to merge two Seq[String], Seq[Double] to Seq[(String,Double)] Scala - Join an iterable of strings Scala - Access element using underscore method ...
use 'auto-down-unreachable-after' instead auto-down = off # The roles of this member. List of strings, e.g. roles = ["A", "B"]. # The roles are part of the membership information and can be used by # routers or other services to distribute work to certain member types, # e....
Now consider a case where we have a list of strings that are numbers, but we want to convert that list to a list of integers: Java: List<Integer> ints = new ArrayList<Integer>(); for (String s : list) { ints.add(Integer.parseInt(s)); } Scala: val ints = list.map(s =>...
strings. * */ tmp=name.mkString("begin",",","end") println("name.mkString(\"begin\",\",\",\"end\") is "+tmp) val aList = List(1,4,3,7,5) /*def mkString(sep: String): String Displays all elements of this list in a string using a separator string. */ tmp=aList....