Question

How to generate an array with unique random numbers in a specified range using TypeScript

Answer 1

function generateUniqueRandomNumbersArray(total_numbers: number, max_range: number) {
    const arr: number[] = []
     
    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: number[] = generateUniqueRandomNumbersArray(15, 21);
 
console.log(arr);
 
 
 
/*
run:
 
[10, 9, 18, 2, 11, 17, 14, 1, 8, 20, 19, 21, 13, 15, 6] 
 
*/

 

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