SOURCE

// 操作数字 翻转
function getSymmetryNum(n) {
    const res = []
    for (let i = 1; i < n; i++) {
        let result = 0
        let count = i

        while (count > 0) {
            result = result * 10 + count % 10
            count = parseInt(count / 10)
        }

        if (i === result) {
            res.push(result)
        }
    }
    return res
}

console.time('getSymmetryNum')
const result1 = getSymmetryNum(1000000)
console.timeEnd('getSymmetryNum')



// 操作数组
function getSymmetryNum1(n) {
    const res = []
    for (let i = 1; i < n; i++) {
        const reverseNum = parseInt(i.toString().split('').reverse().join(''))
        if (reverseNum === i) {
            res.push(i)
        }
    }
    return res
}

console.time('getSymmetryNum1')
const result2 = getSymmetryNum1(1000000)
console.timeEnd('getSymmetryNum1')