I want to implement a function to check if a given number do contain les than two different digits, that are called duodigits
For example :
12 , 110 , -33333 : are all duodigits , since they have no more than two different digits
102 : is not a duodigit since his digits ; 1 and 0 and 2 are three different digits
How may I implement a method , which may iterate and check if it’s a duodgits or not and return true or false as result
>Solution :
Here is how I would do it:
/**
* Checks if a number is a duodigit.
* @param {number} num
* @returns {boolean}
*/
function isDuodigit(num) {
return new Set(Math.abs(num).toString()).size <= 2;
}