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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Thanks for your feedback, random tests added.
Yes, you are totally right, thank you for pointing it out.
Changed to "...since the start of the Anno Domini (January 1, 1)".
What is "the start of the calendar system"? There is many calendar systems, each of them may have different start.
Random tests are needed.
I had thought a workaround regarding turning the array into a string, apply the reverse on it and then turn it back into an array.
But since this exists on PHP, no real need. Just for the fun of tinkering around with it.
friend why do we use &$x instead of $x. I used $x and it was fine
this was the best way here haha