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bazinga-web avatar bazinga-web commented on September 16, 2024
/**
 * @param {number[]} digits
 * @return {number[]}
 */
var plusOne = function (digits) {
  for (let i = digits.length - 1; i >= 0; i--) {
    if (digits[i] !== 9) {
      digits[i]++;
      return digits;
    } else {
      digits[i] = 0;
    }
  }
  return [1, ...digits];
};

from like-algorithms.

Ray-56 avatar Ray-56 commented on September 16, 2024

注意:如果当前位为 9 ,加一后需要进位

/**
 * @param {number[]} digits
 * @return {number[]}
 */
var plusOne = function(digits) {
	const len = digits.length;
	
	// 倒序
	for (let i = len - 1; i >= 0; i--) {
		// 加1
		digits[i]++;
		// 取余,超过 10,取个位
		digits[i] %= 10;
		// 当前不为0,不需要进位,直接返回
		if (digits[i] !== 0) return digits;
	}
	// 执行到这里说明第一位也成为0了,需要再往前进一位
	return [1].concat(digits);
};

from like-algorithms.

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