letNumOrNull function

num? letNumOrNull(
  1. dynamic input
)

Converts input to num, returning Null on failure.

Supported types:

Implementation

num? letNumOrNull(dynamic input) {
  if (input is num) return input;
  if (input is String) {
    final trimmed = input.trim();
    return num.tryParse(trimmed);
  }
  return null;
}