Question

How to generate an array with unique random numbers in a specified range using Node.js

Answer 1

function generateUniqueRandomNumbersArray(total_numbers, max_range) {
    const arr = []
     
    while (arr.length < total_numbers) {
        let number = Math.floor(Math.random() * max_range) + 1
        if (arr.indexOf(number) === -1) {
            arr.push(number)
        }
    }
     
    return(arr)
}
 
 
const arr = generateUniqueRandomNumbersArray(15, 23);
 
console.log(arr);
 
 
 
 
/*
run:
 
[
  10, 11, 23, 12, 18, 4,
   8, 21, 13,  3,  7, 9,
  17, 22, 15
]
 
*/

 

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