Determine if returned skip list is empty

I have a function that searches a string for a substring that may be repeated and returns a skipList object, but the skiplist may sometimes be empty.  What is the easiest way to determine if the skipList is, in fact, empty?  I don't need to know exactly how many items are in the skipList, just whether or not it has any items ( >= 1 ).  I didn't notice a length function for skipLists in the reference manual.

Chris

Re: Determine if returned skip list is empty
Mathias Mamsch - Tue Apr 25 15:36:27 EDT 2017

Well you can make it empty, calling empty(Skip) ... then you know for sure ...just kidding. The easiest way to determine if a skip is empty is to make a loop:

bool isEmpty(Skip sk) { int i; for i in sk do return false; return true }

Regards, Mathias

Re: Determine if returned skip list is empty
chrscote - Wed Apr 26 12:10:54 EDT 2017

bool isEmpty(Skip sk) { int i; for i in sk do return false; return true }

I'd prefer using the first one  , but I don't think my project leader would like that.  Anyway, thank you for the code.

Chris

Re: Determine if returned skip list is empty
Rich M - Thu Jun 21 14:50:18 EDT 2018

bool isEmpty(Skip sk) { int i; for i in sk do return false; return true }

Thanks for that snippet Mathias.  It helped me figure out how to get from one loop of checks into another by checking if the first loop had populated the skip list or not and using it as entry to the next loop if the first checks didn't pass.

TTFN =)