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No it is not a shuffle but it does fulfill the requirements if shuffled means the indexes change. Nice answer.

There are a few ways to shuffle efficiently.

You could swap the first and last card, second and second to last, third and third to last...all the way till you reach half the deck. This does not...

I don't particularly want to go wading through and debugging your source code without getting paid to do so. Post the relevant code or the area you think the problem is in and then we will be more...