Li Kou brush question diary /day5/2022.6.27

Novice Village

Find the maximum value in an array , have access to Math.max() function

First go MDN Check the instructions on the official website

Want to get the maximum value in an array directly

You can use the following expansion methods

var arr = [1, 2, 3];
var max = Math.max(...arr);

Math.max The usage of has been understood

Example

Their thinking ：

Integer networks are stored as two-dimensional arrays , share m That's ok n Column , share m A customer ,n Banks .

So let's define a ans, Return maximum assets ans

Traverse m A customer ,m=accounts.length

Define a number money, Used to store the assets of all banks of each customer

Traverse n Banks ,n=accounts[0].length

Add up the assets of each bank ,money+=accounts[i][j];

Then calculate the maximum value of customer assets ,ans=Math.max[ans,money]

class Solution {
    public int maximumWealth(int[][] accounts) {
        int ans=0;
        for(int i=0;i<accounts.length;i++)
        {
            int money=0;
            for(int j=0;j<accounts[0].length;j++)
            {
            money +=accounts[i][j];
            }
            ans = Math.max(ans, money);
        }
    return ans;
    }
}

Find the maximum value in the array and find its subscript

subjunctive

var arr = [1, 20, 30, 60, 80, 90, 99, 89, 100];
var max = arr[0];             // Suppose the first number is the largest 
int index = 0;                //  Define a subscript 
for (var i = 0; i < arr.length; i++){     // Compare the other numbers in the array with the maximum number we assume , Traverse 
    if (max < arr[i]){            // Let them compare in turn , If it is larger than our assumed number 
        max = arr[i];        //  Let's give the value of the larger number to max
        index = i;          //  Subscript the larger value to index
    }    
}     final max That's the maximum 
console.log(' The maximum value in this array is ：'+ max);
console.log(' The subscript of the maximum value in the array is ：'+index)