toLetter static method

String toLetter(
  1. String? value
)

Converts a string to contain only letters.

Example: 'abc123' -> 'abc'

Implementation

static String toLetter(String? value) {
  String buffer = '';
  if (value != null) {
    for (String character in value.characters) {
      if (Validator.isLetter(character)) {
        buffer = '$buffer$character';
      }
    }
  }
  return buffer;
}