Question

Challenge 1 – 2D Array Maker
Create a function that takes in two parameters and returns a created two-dimension array.
var twoD = Make2D(<width>, <height>);

Challenge 2 – Fill 2D Array
Create a function that takes a single parameter and fills the 2D array with that parameter
Use Cases:
Fill2D(<twoD array>, <fill value>); //fills twoD
twoD = fill2D(<twoD array>, <fill value>); //fills twoD, but also returns reference

Challenge 3 – Make 2D Array
Write a function that takes 3 parameters and makes use of your prior two functions to create a 2D array filled with a default parameter.
var twoD = Init2D(<width>, <height>, <fill val>);

Coded in Java script

Answer 1

Solution:

Challenge 1 – 2D Array Maker
Create a function that takes in two parameters and returns a created two-dimension array.
var twoD = Make2D(<width>, <height>);

Code for function:

function Make2D(width,height)
{
  twoD= new Array(height);
  for(var i=0;i < height ;i++)
  {
    twoD[i] = new Array(width);
  }
  return twoD;
}

Challenge 2 – Fill 2D Array
Create a function that takes a single parameter and fills the 2D array with that parameter
Use Cases:
Fill2D(<twoD array>, <fill value>); //fills twoD
twoD = fill2D(<twoD array>, <fill value>); //fills twoD, but also returns reference

Code for function:

function fill2D(twoD,value)
{
  for (var i = 0; i < twoD.length; i++) 
  { 
    for (var j = 0; j < twoD[i].length; j++) 
    { 
        twoD[i][j] = value; 
    } 
  } 
  return twoD;
}

Challenge 3 – Make 2D Array
Write a function that takes 3 parameters and makes use of your prior two functions to create a 2D array filled with a default parameter.
var twoD = Init2D(<width>, <height>, <fill val>);

Code for function:

function Init2D(width, height, value)
{
  twoD=Make2D(width,height);
  twoD=fill2D(twoD,value);
  return twoD;
}

Complete code of all functions with implementation:

function Make2D(width,height)
{
  twoD= new Array(height);
  for(var i=0;i < height ;i++)
  {
    twoD[i] = new Array(width);
  }
  return twoD;
}
function fill2D(twoD,value)
{
  for (var i = 0; i < twoD.length; i++) 
  { 
    for (var j = 0; j < twoD[i].length; j++) 
    { 
        twoD[i][j] = value; 
    } 
  } 
  return twoD;
}
function Init2D(width, height, value)
{
  twoD=Make2D(width,height);
  twoD=fill2D(twoD,value);
  return twoD;
}
var twoD = Make2D(3,4);
console.log(twoD);

twoD = fill2D(twoD, 2);
console.log(twoD);

twoD = Init2D(5, 6, 7);
console.log(twoD);

Screenshot of complete code and output: