I have 2 object with similar key in each objects whose value is array of string.

How can i format an object with a basic structure to a complex structure containing arrays in an efficient way.

This question already has answers here: Changing one cell in multidimensional array updates entire column (1 answer) Array.fill gives same object repeated. why? [duplicate] (2 answers) Array.prototype.fill() with object passes reference and not new instance (7 answers) Closed 1 hour ago. Why is it that the output so weird! What is the fill method actually […]

let matrix = new Array(3).fill(new Array(3).fill(0)); // creates a 2d Array and fills them with 0 matrix[1][1] = 5; // say console.log(matrix); // should output [[0, 0, 0],[0, 5, 0],[0, 0, 0] // actual-output: [[0, 5, 0], [0, 5, 0], [0, 5, 0]] Why is it the output so weird! what is the fill method […]

How to correctly iterate through shipMisses arrray to see if it contains the nested array with the specific values [2, 4] (the dName variabe)? Here is my code:

I would like to get distinct studentId and classNo from a nested array objects. Also not required empty classNo with the result.