scala - 多线字符串拆分 [英] scala - muliline string split

问题描述

我有这个:

val msg = "Preparado para cocinar..."
val message = msg.splitAt(msg.length()/2)

println(message._1 + "\n" + message._2.trim())

问题是我得到了这个结果(bcz我只是在中间分割它):

The problem is that I am getting this result (bcz I am just spliting it at the middle):

Preparado pa
ra cocinar...

如何显示多条消息(不仅是两部分)，但应该用空格分隔，而不是在句子中间?

How I can have a multi(not only in 2 parts) displayed message but it should be separated in spaces not in the middle of the sentence?

推荐答案

一个相当优雅的函数式解决方案

A reasonably elegant functional solution

def wordWrap(s: String, n: Int) = s.split("\\s").foldLeft(List[String]())
     { (lines, word) =>
        if (lines.isEmpty || lines.head.length + word.length + 1 > n)
          word :: lines
       else
         (lines.head + " " + word) :: lines.tail
     }
    .reverse

wordWrap( "Preparado para cocinar...", 23)
// List(Preparado para, cocinar...)
wordWrap( "Preparado para cocinar...", 5)
// List(Preparado, para, cocinar...)
wordWrap("A quick brown fox jumps over the lazy dog.", 10)
// List(A quick, brown fox, jumps over, the lazy, dog. )

只检查一次空列表的变体

A variant that just checks the empty list once

def wordWrap(s: String, n: Int) = {
    val words = s.split("\\s")
    if (words.isEmpty) Nil
    else
      words.tail.foldLeft(List[String](words.head)){ (lines, word) =>
         if (lines.head.length + word.length + 1 > n) 
           word :: lines
         else
          (lines.head + " " + word) :: lines.tail
      }.reverse
  }

这篇关于scala - 多线字符串拆分的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！