Pascals Triangle

gistfile1.txt

 

 /*

an array of arrays
n number of arrays 
if its over

/*

Will want to create an array of n array's
Inside each array is n number of '1' so that it mimics the triangle formation 
then I will want to loop through the inner arrays (triangle rows) 
If there is 3 or more elements within the array {
I want to then look the the array at the previous index, and add together its element[0] and element[1];
I will make that sum the value of the initial row[1] and then increment to the next row element.
I will then continue to add together element[0 + 1] and element[1 + 1] of the preceding row and repeat the process... 
until whatever element element[i+1] elvauates to undefined
If it is undefinded then I will not change the row's last element. 
I will repreat this process until I have gone through the eni


 */

var pascalsTriangle = function(n) {

    var start = [1];

    var triangle = [[1], [1, 1]];

   for (var i = 0; i < n-2; i++) {
       triangle.push(start);
       
   }

   triangle[1].push(1);

//how to i access information in one triangle element, and then alter the information in element + 1;

   //loop through each inner array of the triangle array 
   for (var row = 0; row < triangle.length; row++) {
       // row is an array 
       var count = 0;
       if ([row+1].length < 1){
           for (var block = 0; block <= row.length; block++){
               var count = 0;
               count = row[block] + row[block +1];

               if (count){
                triangle[row + 1].push(count);
               } else if (!count) {
                 triangle[row + 1].push(1)
               }

              


           }
           //add together together arr[0] + 1 and then store that variable
       }
     //triangle[row].push(1);
   }
    
    console.log(triangle)

}

pascalsTriangle(5)