Question

How to remove empty elements from an array in TypeScript

Answer 1

let array: (string | number | null | undefined)[] = [7, 8, null, "typescript", "", 7, undefined, 9, , , undefined, 0, , 8,];
   
console.log(array);
  
array = array.filter(element => {
    return element != undefined && element != null && element != "";
});
  
console.log(array);
       
      
      
/*
run:
      
[7, 8, null, "typescript", "", 7, undefined, 9, , , undefined, 0, , 8] 
[7, 8, "typescript", 7, 9, 8] 
      
*/

 

70+ SQL courses for beginners and professionals

Answer 2

let array: (string | number | null | undefined)[] = [7, 8, null, "typescript", "", 7, undefined, 9, , , undefined, 0, , 8,];
   
array = array.filter(n => n)
  
console.log(array);
       
      
      
/*
run:
      
[7, 8, "typescript", 7, 9, 8] 
      
*/

 

70+ SQL courses for beginners and professionals