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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.
This is because substr prints the number of characters after the
starting index
. Had you started from0
, you would just need to subtract1
to exclude thelast element
.But since you have started from
1
, it has shifted the range by1
, which means the last character is included again. So you need to subtract2
.