var students = [];

var results = [];

​

students = [[{"id":"101","name":"one","marks":"67"}, {"id":"102","name":"two","marks":"89"}]]

​

console.log(students); //array of array

console.log('-----'); 

console.log(students[0]); //array of object

console.log('-----'); 

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

    console.log(students[i]); //the array of object

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

    results.push(students[i][j]);  

  }

}

console.log('--Results---');

console.log(results);

​