A JavaScript array operation problem

The topics are as follows:

var arr = [' 100px ', ' abc ' -6,[],-98765,34,-2,0, ' + ',,functionnulltrue  function() {alert (3);}, ' xyz ' -90 ]; // 1. Find all the numbers in arr: -98765,,-2, 0, 5 // 2, find can be converted into numbers: "100px",-98765, 34,-2, "300", "23.45 Yuan", 5 // 3, the conversion into a number, the maximum value to be judged out: // 4. Find out where Nan is located: 1, +, +

1. Find all the numbers in arr:-98765, 34,-2, 0, 5

// 1. Find all the numbers in arr: -98765,,-2, 0, 5 var num1 =[];  for (var i = 0;i<arr.length; i++) {    // filter out numbers and strings that can be converted to numbers    var re = /^(\-?) \d+$/;       if typeof (Arr[i])! = ' String ') {        num1.push (arr[i]);}    } Console.log (NUM1);

2, find can be converted into numbers: "100px",-98765, 34,-2, "300", "23.45 Yuan", 5

// 2, find can be converted into numbers: "100px",-98765, 34,-2, "300", "23.45 Yuan", 5 var num2=[];  for (var j =0; j<arr.length; J + +) {    //parseint parses a string and returns an integer    if  (parseint (Arr[j])) {        Num2.push (arr[j]);}    } Console.log (num2);

3, the conversion into a number, the maximum value judged out: 300

// 3, the conversion into a number, the maximum value to be judged out: // assuming the maximum value is the first element of the array, the loop ratio var _max = num2[0];  for (var m=0; m<num2.length; m++) {    if(_max < num2[m]) {        =  NUM2[M];    }    } Console.log (_max);

4. Find out where Nan is located: 1, 14, 17, 19

// 4. Find out where Nan is located: 1, +, + var _index = [];  for (var n=0; n<arr.length; n++) {    if(Number.isnan (Arr[n])) {        _index.push (n) ;    }} Console.log (_index);

Check the data to complete, do not forget the fast AH

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A JavaScript array operation problem