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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.
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@prohairesis Give it a check, the function indeed breaks for really long words.
That is not true. He is not looping through each letter intentionally. The test case you provide, "longlonglongword2 hello1", would still pass. He does not need to loop through each letter, he is using .indexOf on the entire word to find the index from the outer loop contained within the ENTIRE word. If not, continue looping until it finds it. Once it finds it, push it to result.