Scala返回坐标作为元组 [英] Scala returning coordinate as tuple

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问题描述

我有一个7×7的网格,我必须解析一个填充网格的字符串。所以如果我有一个49个元素的字符串,我需要将字符串转换为一个可用的网格。网格用一个如下所示的地图表示:

  Map [(Int,Int),List [Int])] 

以下是我到目前为止:



<$ p [p(int,Int),List [Int]]):Map [(Int,Int),int(int)列表[Int]] = {
str match {
case=> lst
case _ => if(x == 6){
if(str.charAt(0).equals('。')){
parseHelper(str.substring(1),0,y + 1,lst + ((x,y) - > List(-1)))
} else {
print(str =+ str +int =+ str(0)+list = + lst.head +\\\

parseHelper(str.substring(1),0,y + 1,lst +((x,y) - > List(str(0)))
}
} else {
if(str.charAt(0).equals('!')){
parseHelper(str.substring(1),x + y,lst +((x,y) - > List(-1)))
} else {
print(str =+ str +int =+ str(0)+ list =+ lst.head +\\\

parseHelper(str.substring(1),x + 1,y,lst +((x,y) - > List(str(0) ))
}
}
}
}

代表一个空白点,所以我们把 -1 代表。



示例字符串: !!!! 8!3 !!! 6 !! 7 !! 84!3!5 !! 2!9 !!! 1!54!8 !!!!!!!!! 4!27!6 !!! 3!1 !! 7!4!72 !! 4 !! 6 !!! 4!1! 3



我用于调试的打印语句。问题是当我输入不是-1的int时,输入一个从不在字符串中的数字。下面我有输出:

  str = 8.3 ... 6..7..84.3.5..2.9 .. .1.54.8 ......... 4.27.6 ... 3.1..7.4.72..4..6 ... 4.1 ... 3 int = 8 list =((0,0) ,列表(-1))
str = 3 ... 6..7..84.3.5..2.9 ... 1.54.8 ......... 4.27.6 ... 3.1..7.4.72..4..6 ... 4.1 ... 3 int = 3 list =((5,0),List(-1))
str = 6..7 .. 84.3.5..2.9 ... 1.54.8 ......... 4.27.6 ... 3.1..7.4.72..4..6 ... 4.1 ... 3 int = 6 list =((5,0),List(-1))
str = 7..84.3.5..2.9 ... 1.54.8 ......... 4.27.6 ..列表=((5,0),列表(-1))
str = 84.3.5 .. 2.9 ... 1.54.8 ......... 4.27.6 ... 3.1..7.4.72..4..6 ... 4.1 ... 3 int = 8 list =((5 ,0),List(-1))
str = 4.3.5..2.9 ... 1.54.8 ......... 4.27.6 ... 3.1..7.4.72。 .4..6 ... 4.1 ... 3 int = 4 list =((7,1),List(56))
str = 3.5..2.9 ... 1.54.8 .... ..... 4.27.6 ... 3.1..7.4.72..4..6 ... 4.1 ... 3 int = 3 list =((7,1),List(56))
str = 5..2.9 ... 1.54.8 ......... 4.27.6 ... 3.1..7.4.72..4..6 ... 4.1 ... 3 int = 5 list =((7,1),List(56))
str = 2.9 ... 1.54.8 ......... 4.27.6 ... 3.1..7.4.72 ..4..6。 ..4.1 ... 3 int = 2 list =((7,1),List(56))
str = 9 ... 1.54.8 ......... 4.27.6。 .3.1..7.4.72..4..6 ... 4.1 ... 3 int = 9 list =((7,1),List(56))
str = 1.54.8 .. ....... 4.27.6 ... 3.1..7.4.72..4..6 ... 4.1 ... 3 int = 1 list =((7,1),List(56))
str = 54.8 ......... 4.27.6 ... 3.1..7.4.72..4..6 ... 4.1 ... 3 int = 5 list =((7 ,1),List(56))
str = 4.8 ......... 4.27.6 ... 3.1..7.4.72..4..6 ... 4.1 ... 3 int = 4 list =((7,1),List(56))
str = 8 ......... 4.27.6 ... 3.1..7.4.72..4。 .6 ... 4.1 ... 3 int = 8 list =((7,1),List(56))
str = 4.27.6 ... 3.1..7.4.72..4 .. 6 ... 4.1 ... 3 int = 4 list =((7,1),List(56))
str = 27.6 ... 3.1..7.4.72..4..6 .. .4.1 ... 3 int = 2 list =((7,1),List(56))
str = 7.6 ... 3.1..7.4.72..4..6 ... 4.1。 .3 int = 7 list =((7,1),List(56))
str = 6 ... 3.1..7.4.72..4..6 ... 4.1 ... 3 int = 6 list =((7,1),List(56))
str = 3.1..7.4.72..4..6 ... 4.1 ... 3 int = 3 list =(( 7,1),List(56))
str = 1..7.4.72..4..6 ... 4.1 ... 3 int = 1 list =((7,1),List 56))
str = 7.4.72..4..6 ... 4.1 ... 3 int = 7 list =((7,1),List(56))
str = 4.72..4..6 ... 4.1 ... 3 int = 4 list =((7,1),List 56))
str = 72..4..6 ... 4.1 ... 3 int = 7 list =((7,1),List(56))
str = 2 .. 4 ... 6 ... 4.1 ... 3 int = 2 list =((7,1),List(56))
str = 4..6 ... 4.1 ... 3 int = 4 list =((7,1),List(56))
str = 6 ... 4.1 ... 3 int = 6 list =((7,1),List(56))
str = 4.1 ... 3 int = 4 list =((7,1),List(56))
str = 1 ... 3 int = 1 list =((7,1),List ))
str = 3 int = 3 list =((7,1),List(56))

由于某些原因,字符串中的56字符不等于数字 56 被输入映射。



感谢您的帮助!

解决方案

您正在使用ASCII代码字符。你想要的是使用 str(0).asDigit ,将其转换为数位。话虽如此,你这样做太复杂了。你可以得到你想要的东西:

  str.zipWithIndex.map {case(digit,index)=> ((index / 7,index%7),digit.asDigit)} toMap 


I have a 7 by 7 grid, and I have to parse a string that fills in the grid. So if I have a string with 49 elements, I need to convert the string into a usable grid. The grid is represented with a map that looks like this:

Map[(Int, Int), List[Int])]

Here's what I have so far:

   def parseHelper(str: String, x: Int, y: Int, lst: Map[(Int, Int), List[Int]]): Map[(Int,Int), List[Int]] = {
      str match{
      case "" => lst
      case _ => if (x == 6){
          if (str.charAt(0).equals('.')){
            parseHelper(str.substring(1), 0, y+1, lst + ((x, y) -> List(-1)))
          } else {
            print("str = " + str + " int = " + str(0) + " list = " + lst.head + "\n")
            parseHelper(str.substring(1), 0, y+1, lst + ((x,y) -> List(str(0))))
          }
      } else {
        if (str.charAt(0).equals('!')){
          parseHelper(str.substring(1), x+1, y, lst+((x, y) -> List(-1)))
        } else {
          print("str = " + str + " int = " + str(0) + " list = " + lst.head + "\n")
          parseHelper(str.substring(1), x+1, y, lst+((x,y) -> List(str(0))))
        }
     }
    }
  }

The ! represents a blank spot, so we put -1 to represent that.

Example String: !!!!8!3!!!6!!7!!84!3!5!!2!9!!!1!54!8!!!!!!!!!4!27!6!!!3!1!!7!4!72!!4!!6!!!4!1!!!3

The print statements I have for debugging. The issue is that when I enter an int that isn't -1, a number that was never in the string is entered. Below I have the output:

str = 8.3...6..7..84.3.5..2.9...1.54.8.........4.27.6...3.1..7.4.72..4..6...4.1...3 int = 8 list = ((0,0),List(-1))
str = 3...6..7..84.3.5..2.9...1.54.8.........4.27.6...3.1..7.4.72..4..6...4.1...3 int = 3 list = ((5,0),List(-1))
str = 6..7..84.3.5..2.9...1.54.8.........4.27.6...3.1..7.4.72..4..6...4.1...3 int = 6 list = ((5,0),List(-1))
str = 7..84.3.5..2.9...1.54.8.........4.27.6...3.1..7.4.72..4..6...4.1...3 int = 7 list = ((5,0),List(-1))
str = 84.3.5..2.9...1.54.8.........4.27.6...3.1..7.4.72..4..6...4.1...3 int = 8 list = ((5,0),List(-1))
str = 4.3.5..2.9...1.54.8.........4.27.6...3.1..7.4.72..4..6...4.1...3 int = 4 list = ((7,1),List(56))
str = 3.5..2.9...1.54.8.........4.27.6...3.1..7.4.72..4..6...4.1...3 int = 3 list = ((7,1),List(56))
str = 5..2.9...1.54.8.........4.27.6...3.1..7.4.72..4..6...4.1...3 int = 5 list = ((7,1),List(56))
str = 2.9...1.54.8.........4.27.6...3.1..7.4.72..4..6...4.1...3 int = 2 list = ((7,1),List(56))
str = 9...1.54.8.........4.27.6...3.1..7.4.72..4..6...4.1...3 int = 9 list = ((7,1),List(56))
str = 1.54.8.........4.27.6...3.1..7.4.72..4..6...4.1...3 int = 1 list = ((7,1),List(56))
str = 54.8.........4.27.6...3.1..7.4.72..4..6...4.1...3 int = 5 list = ((7,1),List(56))
str = 4.8.........4.27.6...3.1..7.4.72..4..6...4.1...3 int = 4 list = ((7,1),List(56))
str = 8.........4.27.6...3.1..7.4.72..4..6...4.1...3 int = 8 list = ((7,1),List(56))
str = 4.27.6...3.1..7.4.72..4..6...4.1...3 int = 4 list = ((7,1),List(56))
str = 27.6...3.1..7.4.72..4..6...4.1...3 int = 2 list = ((7,1),List(56))
str = 7.6...3.1..7.4.72..4..6...4.1...3 int = 7 list = ((7,1),List(56))
str = 6...3.1..7.4.72..4..6...4.1...3 int = 6 list = ((7,1),List(56))
str = 3.1..7.4.72..4..6...4.1...3 int = 3 list = ((7,1),List(56))
str = 1..7.4.72..4..6...4.1...3 int = 1 list = ((7,1),List(56))
str = 7.4.72..4..6...4.1...3 int = 7 list = ((7,1),List(56))
str = 4.72..4..6...4.1...3 int = 4 list = ((7,1),List(56))
str = 72..4..6...4.1...3 int = 7 list = ((7,1),List(56))
str = 2..4..6...4.1...3 int = 2 list = ((7,1),List(56))
str = 4..6...4.1...3 int = 4 list = ((7,1),List(56))
str = 6...4.1...3 int = 6 list = ((7,1),List(56))
str = 4.1...3 int = 4 list = ((7,1),List(56))
str = 1...3 int = 1 list = ((7,1),List(56))
str = 3 int = 3 list = ((7,1),List(56))

For some reason, the number 56 is entered into the mapping, when 56 isn't even in the string.

Thanks for the help!

解决方案

You're using the ASCII code for the Char. What you want is to use str(0).asDigit, to convert it to a digit. That being said, you're making this way too complicated. You can get what you want with something like:

str.zipWithIndex.map{case (digit, index) => ((index / 7, index % 7), digit.asDigit)}.toMap

这篇关于Scala返回坐标作为元组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!

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