Function compareDigits

test/big-decimal/cross-validation.test.ts:44–56

* Compare the first `matchDigits` significant digits of two numeric strings. * Returns true if they match.

(
  ours: string,
  theirs: string,
  matchDigits: number
)

 * Returns true if they match.
 */
function compareDigits(
  ours: string,
  theirs: string,
  matchDigits: number
): boolean {
  const ourDigits = significantDigits(ours);
  const theirDigits = significantDigits(theirs);

  const ourSlice = ourDigits.slice(0, matchDigits);
  const theirSlice = theirDigits.slice(0, matchDigits);

  return ourSlice === theirSlice;
}

/**
 * Format a comparison failure message showing where the digits diverge.