Question

How to print nested array in TypeScript

Answer 1

const nestedArray = [ 1, 5, [[2]], [[[7]]], [[[[[[[99]]]]]]] ];

const flatten = arr => arr.reduce((a : any, b : any) => a.concat(Array.isArray(b) ? flatten(b) : b), []);
  
  
console.log(flatten(nestedArray));
    
     
   
      
/*
run:
      
[1, 5, 2, 7, 99] 
      
*/

 

70+ SQL courses for beginners and professionals

Answer 2

const nestedArray = [ 1, 5, [[2]], [[[7]]], [[[[[[[99]]]]]]] ];

const flatten = arr => arr.reduce((a : any, b : any) => a.concat(Array.isArray(b) ? flatten(b) : b), []);
  
const flatArray= flatten(nestedArray);
  
for (let i = 0; i < flatArray.length; i++) {
    console.log(flatArray[i]);  
}
    
     
   
      
/*
run:
      
1 
5 
2 
7 
99
      
*/

 

70+ SQL courses for beginners and professionals