formatCurrencyPair function

String formatCurrencyPair({ required String base, required String counter, String? delimiter, })

Formats a currency pair using a base and counter currency, and optionally includes a delimiter.

This function takes in two required parameters: baseCurrency and counterCurrency, which represent the two parts of the currency pair. An optional delimiter can be specified to separate the two currencies in the returned string. If no delimiter is provided or if it's an empty string, the currencies will be concatenated without any separator.

// Example without delimiter:
String currencyPair = formatCurrencyPair(
    baseCurrency: 'USD', counterCurrency: 'EUR');
print(currencyPair); // Output: USDEUR

// Example with delimiter:
String currencyPairWithDelimiter = formatCurrencyPair(
    baseCurrency: 'USD', counterCurrency: 'EUR', delimiter: '/');
print(currencyPairWithDelimiter); // Output: USD/EUR

baseCurrency: The base currency code in the pair. counterCurrency: The counter currency code in the pair. delimiter: An optional string to separate the base and counter currencies.

Implementation

String formatCurrencyPair({
  required String base,
  required String counter,
  String? delimiter,
}) {
  String formattedPair = base.toUpperCase();

  if (delimiter != null && delimiter.isNotEmpty) {
    formattedPair += delimiter;
  }

  formattedPair += counter.toUpperCase();

  return formattedPair;
}