for( var i = 0, len_i = json.length; i < len_i; i++ ) {

    for( var j = 0, len_j = json[ i ].length; j < len_j; j++ ) {

        // do something with json[ i ][ j ]; (the value in the inner Array)

    }

}

​

function filteredArray(arr, elem) {

  let newArr = [];

  // Only change code below this line

  for (let i = 0; i < arr.length; i++) {

    if (arr[i].indexOf(elem) === -1) {

       newArr.push(arr[i]);

    }

  }

  // Only change code above this line

  return newArr;

}

​

console.log(filteredArray([["amy", "beth", "sam"], ["dave", "sean", "peter"]], "peter"));