Menu
I want to get random object from array, is there any way how can I find random object from mutable array?
763
Use the numpy.random.choice() function to generate the random choices and samples from a NumPy multidimensional array. Using this function we can get single or multiple random numbers from the n-dimensional array with or without replacement.
nextInt() method of Random class can be used to generate a random value between 0 and the size of ArrayList. Now use this number as an index of the ArrayList. Use get () method to return a random element from the ArrayList using number generated from nextInt() method.
Picking a Random Item/Items In order to get a random item from a List instance, you need to generate a random index number and then fetch an item by this generated index number using List. get() method. The key point here is to remember that you mustn't use an index that exceeds your List's size.
@interface NSArray (Random)
- (id) randomObject;
@end
@implementation NSArray (Random)
- (id) randomObject
{
if ([self count] == 0) {
return nil;
}
return [self objectAtIndex: arc4random() % [self count]];
}
@end
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
