Question

How to get rows and columns size in 2D (Two-dimensional) array with TypeScript

Answer 1

let arr:number[][] = [[1,2,3,4], [5,6,10], [7,8,9], [12,18], [0,1,0,1,0,1]];
 
console.log("total rows: " + arr.length);

for (let i = 0; i < arr.length; i++) {
    console.log("column: " + i + " size: " + arr[i].length);
}
 
 
   
   
   
   
/*
   
run:
 
"total rows: 5" 
"column: 0 size: 4" 
"column: 1 size: 3" 
"column: 2 size: 3" 
"column: 3 size: 2" 
"column: 4 size: 6" 
  
*/

 

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