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Java Introduction to Functional Programming Functional Programming Fundamentals Compose Price Conversion Functions

Marzoog AlGhazwi
Marzoog AlGhazwi
15,796 Points
Posted by Marzoog AlGhazwi
Marzoog AlGhazwi
15,796 Points

I don't know how to solve this challenge can someone help me 

  public static List<String> getPricesConvertedForArgentina(List<HousingRecord> records) {
    Locale argLocale = Locale.forLanguageTag("es-AR");
    // This fluctuates and is hardcoded temporarily
    BigDecimal argPesoToUsdRate = new BigDecimal("15.48");

    // TODO: These functions are in working order, but separately they don't match the single Function signature expected
    Function<Integer, BigDecimal> usdToArgentinePesoConverter = usd -> argPesoToUsdRate.multiply(new BigDecimal(usd));

    Function<BigDecimal, String> argentineCurrencyFormatter = price -> {
      Currency currentCurrency = Currency.getInstance(argLocale);
      NumberFormat currencyFormatter =
        NumberFormat.getCurrencyInstance(argLocale);
      return String.format("%s (%s)",
        currencyFormatter.format(price),
        currentCurrency.getDisplayName()
      );
    };

    Function<Integer, String> usdToArgentinePesoConverterAndFormatter =
      usdToArgentinePesoConverter.andThen(argentineCurrencyFormatter);


    return getConvertedPriceStatements(records,
      // TODO: Correct this.  It should to convert AND format.  However, there is room parameter wise for only one Function...hmmm.
      usdToArgentinePesoConverterAndFormatter);
  }

Tests failed

java.lang.AssertionError: 
Expected: iterable containing ["First is $1.00 (USD) which is $15,48 (Argentine Peso)", "Second is $2.00 (USD) which is $30,96 (Argentine Peso)"]
     but: item 0: was "First is $1.00 (USD) which is $ 15,48 (Argentine Peso)"

1 Answer

Brendan Whiting
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Brendan Whiting
Front End Web Development Techdegree Graduate 84,735 Points
Brendan Whiting
.a{fill-rule:evenodd;}techdegree seal-36
Brendan Whiting
Front End Web Development Techdegree Graduate 84,735 Points

Your code looks good. I pasted it in and it passed all the tests locally for me, and passed the tests after I uploaded it.

In your failing test, there's an extra space being added between the dollar sign and the number in the Argentinian peso ($15,48 vs $ 15,48). I'm not sure why, but in the history of questions on this topic it seems like there might be an issue with the locale, depending on where you are in the world. Try uploading your code anyway even if the tests aren't passing locally.