Question

How to get the last column from a matrix (2D array) in JavaScript

Answer 1

const arr = [
  [1, 2, 3, 5, 9],
  [4, 5, 6, 5, 8],
  [7, 8, 9, 5, 7]
];

const cols = arr[0].length;
   
const lastcol = arr.map(function(value,index) { return value[cols - 1]; });
   
console.log(lastcol); 
   
   
     
       
       
/*
run:
       
[9, 8, 7]
       
*/

 

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