var arr = [34, 12, 55, 27];
console.log(Math.min.apply(null, arr)) // apply()
console.log(Math.min(...arr)) // 扩展运算符
console.log(eval("Math.min(" + arr.toString() + ")")) //eval()
console.log(arr.sort((a,b) => a - b)[0]) // sort()

    var min = arr[0]
    arr.forEach(item => min > item ? item : null)
        console.log(min)      //遍历