题解 | 寻找峰值

/**
 * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
 * [2,4,1,2,7,8,4] => 1
 * [1,2,3,1] => 2
 * [1,2,3,4,5] => -1
 *
 * @param nums int整型一维数组
 * @return int整型
 */
function findPeakElement(nums) {
    if (nums.length === 1) return 0;
    // write code here
    let index = 0;
    while (index <= nums.length - 1) {
        let index_left = index - 1;
        let index_right = index + 1;

        const is_big_left = nums[index_left]
            ? nums[index] > nums[index_left]
            : true;
        const is_big_right = nums[index_right]
            ? nums[index] > nums[index_right]
            : true;
        if (is_big_left && is_big_right) {
            return index;
        } else {
            index++;
        }
    }
    return -1;
}
module.exports = {
    findPeakElement: findPeakElement,
};