checkNonDuplicates

[mia023]

if we randomly generate Complex numbers how can we check if these numbers are duplicate or not??

[BigDaddyLH]

if we randomly generate Complex numbers how can we check if these numbers are duplicate or not??

By comparing them in some way, or generating them in a fashion that precludes duplication.

What are you trying to do? What is your goal?

[dmjpro]

if we randomly generate Complex numbers how can we check if these numbers are duplicate or not??

I think when you are generating Random number then Random numbers API ensures that no duplicate numbers will be generated.

Debasis Jana

[chaarmann]

if no duplicates occur, then it's not "random" anymore.
if you want to have a sequence of numbers that "look random", but without duplicates, then you can use the System.getCurrentTimeMillis() function. (always wait for a random number of milliseconds before getting the next number in sequence). Then you can cut off the highest digits and shuffle them if needed.

Otherwise, to sort out the duplicates in an array that already contains random generated numbers, you have to compare the last number in array against all the others and delete if it already exists, then the second last against all the others and so on. (like bubble sort).

or you use a Binary Tree for better performance: put the first in, then the second if the second is not already inside, then the third if it is not already inside and so on.

[mia023]

Here is the way that I thought of it:

public static boolean check_NonDuplicate(Complex c[]){
c=new Complex[c.length];
for(int i=0;i<c.length;i++){
if((c[0].getReal()!=c[i].getReal()||c[0].getImag()!=c[i].getImag()))
return false;

}
return true;
}

[JosAH]

I think when you are generating Random number then Random numbers API ensures that no duplicate numbers will be generated.

Debasis Jana

*ahem* did you actually *read* the API documentation of the Random class?

kind regards,

Jos

[dmjpro]

*ahem* did you actually *read* the API documentation of the Random class?

kind regards,

Jos

Sorry :-(

Debasis Jana