JSFiddle - React, Tailwind, and code Playground

JavaScript

var md1 = [['one','one','three'],['four','five','five'],['one','one','one']];
    
    var md2 = [['one','one','nine'],['one','one','one'],['two','two'],['two','two','two']];
    
    for(var x = 0; x < md1.length; x++){
        for(var y = 0; y < md2.length; y++){
          if(md1[x][0] == md2[y][0] && md1[x][1] == md2[y][1]){
            alert("match found");
            alert("Array 1 element with index " + x + " matches Array 2 element with index " + y);
          }
        }
    }