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Prevent Duplicates in Array

Kevin Robertson

4 years ago

How do I prevent duplicate values in an Array?

The elements of my Array are added by generating random numbers when I click a button on my form but shouldn't have the same value more than once.

I have seen code online for removing duplicates but that changes the size of the Array and I need it to remain the same size as it is used to populate 6 labels on my form.

The screenshot below shows my form and Button Click Event.

	Kevin Robertson OP @Reply 4 years ago

	Alex Hedley @Reply 4 years ago
Use a Set instead

	Alex Hedley @Reply 4 years ago
Could also store the random number in a variable and check if it doesn't already exist in the array before adding it

	Richard Rost @Reply 4 years ago
Yeah, Alex has the right idea. Assign your random number to a variable. Loop thru the array checking for it, if it's not found, add it.

	Kevin Robertson OP @Reply 4 years ago
Thanks guys for pointing me in the right direction. It appears to be working (famous last words. LOL).

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