如何在javascript中查找二维数组的索引值

I have a 2D array which looks like this:

我有一个2D数组,看起来像这样:

var numbers=[[1,2,3,4,5],[6,2,3,5,5],[9,8,3,4,9]]

How to find the index value of the above two dimensional array?

如何找到上述二维数组的索引值?

2 个解决方案

#1

Try like this

试试这样吧

var searchItem=2;
numbers.forEach(function(parentItem,parentIndex){
  parentItem.forEach(function(childItem,childIndex){
     if(childItem===searchItem){
        console.log(parentIndex);
        console.log(childIndex);            
     }     
 })

});

#2

function findInArr(arr, elm) {
    var occ = [];
    for(var i = 0; i < arr.length; i++)
        for(var j = 0; j < arr[i].length; j++)
            if(arr[i][j] == elm)
                occ.push(i+"*"+j);
    return occ;
}

Test:

var numbers = [[1,2,3,4,5],[6,2,3,5,5],[9,8,3,4,9]];
var x = findInArr(numbers, 4);
console.log("found " + x.length + " occurences: " + x);

found 2 occurences: 0*3,2*3

发现2次出现:0 * 3,2 * 3