js获取数组中最大最小值及对应索引值（下标）

1.使用原生Js实现该功能，主要是通过循环实现

getMaxMin = (data, key) => {
    if (!data) {
        return false
    }
    let maxIndex = 0
    let minIndex = 0
    let maxNum = data[0][key] || 0
    let minNum = (data[0][key] && data[0][key] !== 0) ? Infinity : data[0][key]
    data.forEach((item, index) => {
        if (item[key] >= maxNum && item[key] !== undefined) {
            maxNum = item[key]
            maxIndex = index
        }
        if (item[key] <= minNum && item[key] !== undefined) {
            minNum = item[key]
            minIndex = index
        }
    })
    console.log(maxNum, minNum, maxIndex, minIndex)
}

1. 使用es6(数组的解构， indexOf(方法))

getIndexMAx = (arr) => {
    const maxNum = Math.max(...arr)
    const minNum = Math.min(...arr)
    const [maxIndex, minIndex] = [arr.indexOf(maxNum), arr.indexOf(minNum)]
    console.log(maxNum, minNum, maxIndex, minIndex)
}