Question

How to create a new array with a specified range of numbers in Node.js

Answer 1

let len = 7;
 
const arr = Array.from({ length: len }, (_, i) => i)

console.log(arr);
  
  
  
       
/*
run:
     
[ 0, 1, 2, 3, 4, 5, 6 ]
   
*/

 

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Answer 2

let len = 7;
 
const arr = Array.from({ length: len }, (_, i) => i * 2)

console.log(arr);
  
  
  
       
/*
run:
     
[ 0, 2, 4, 6, 8, 10, 12 ]
   
*/

 

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Answer 3

const arrayValueRange = (start, stop, step) =>
    Array.from(
    { length: (stop - start) / step + 1 },
    (value, index) => start + index * step
    );
 
const arr = arrayValueRange(4, 17, 3);

console.log(arr);
  
  
  
       
/*
run:
     
[ 4, 7, 10, 13, 16 ]
   
*/

 

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