Simple and easy JS Solution || 53ms ✅✅ ||Beats 93.55%🔥🔥||
\n# Code\n\n\nvar intersection = function (nums) {\n    arr = [];\n    for (i = 0; i < nums.length; i++)\n        for (j = 0; j < nums[i].length; j++)\n        
\n# Code\n```\n\nvar intersection = function (nums) {\n    arr = [];\n    for (i = 0; i < nums.length; i++)\n        for (j = 0; j < nums[i].length; j++)\n            if (arr[nums[i][j]] == undefined)\n                arr[nums[i][j]] = 1;\n            else\n                arr[nums[i][j]]++;\n    neww = [];\n    for (i = 0; i < arr.length; i++)\n        if (arr[i] == undefined)\n            continue;\n        else if (arr[i] == nums.length)\n            neww.push(i);\n    return neww;\n};\n```
['JavaScript']