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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.
oystercar ☃ ~ 10001 ◯ : coffee
coffee> str = "The quick brown fox jumped over the lazy dog."
'The quick brown fox jumped over the lazy dog.'
coffee> str[1..]
'he quick brown fox jumped over the lazy dog.'
coffee> str[5..]
'uick brown fox jumped over the lazy dog.'
coffee> str[20..]
'jumped over the lazy dog.'
coffee> ending = 25
25
coffee> str[ending..]
'd over the lazy dog.'
coffee> ending = 3
3
coffee> str[-ending..]
'og.'
Hope that clears it up! :)
the str.length here is superfluous.
str[-ending.length..] is ending would work the same.