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  1. import java.util.*
  2.  
  3. fun extractCurrencyAndAmount(input: String): Triple<String, String, Boolean> {
  4.     var amountStart = -1
  5.     var amountEnd = -1
  6.     var currencyStart = -1
  7.     var currencyEnd = -1
  8.  
  9.     input.forEachIndexed { index, char ->
  10.         if (char.isDigit()) {
  11.             if (amountStart == -1) {
  12.                 amountStart = index
  13.             }
  14.             amountEnd = index
  15.         } else if (!char.isWhitespace()) {
  16.             if (currencyStart == -1) {
  17.                 currencyStart = index
  18.             }
  19.             currencyEnd = index
  20.         }
  21.     }
  22.  
  23.     if (listOf(amountStart, amountEnd, currencyStart, currencyEnd).any { it == -1 }) {
  24.     throw IllegalArgumentException("Invalid input format")
  25. }
  26.  
  27.     val amount = input.substring(amountStart, amountEnd + 1)
  28.     val currency = input.substring(currencyStart, currencyEnd + 1)
  29.     val isCurrencyAtFront = currencyStart < amountStart
  30.  
  31.     return Triple(currency, amount, isCurrencyAtFront)
  32. }
  33.  
  34. fun main(args: Array<String>) {
  35.     println( extractCurrencyAndAmount("\$100") )
  36.     println( extractCurrencyAndAmount("100 \$") )
  37.  
  38. }
Success #stdin #stdout 0.1s 41272KB
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stdin
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Standard input is empty
stdout
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($, 100, true)
($, 100, false)
https://ideone.com/SzpwLj
language:
Kotlin (kotlin 1.3.21)
created:
2 years ago
visibility:
secret

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