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Fixed binary search to correctly recurse to left half and right half

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This commit is contained in:
TaylorL19 2017-10-10 11:57:16 -05:00
parent 3ecb193ae6
commit 8f71b30995
1 changed files with 2 additions and 2 deletions
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4
searches/binary_search.py
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@ -110,9 +110,9 @@ def binary_search_by_recursion(sorted_collection, item, left, right):
if sorted_collection[midpoint] == item:
return midpoint
elif sorted_collection[midpoint] > item:
return binary_search_by_recursion(sorted_collection, item, left, right-1)
return binary_search_by_recursion(sorted_collection, item, left, midpoint-1)
else:
return binary_search_by_recursion(sorted_collection, item, left+1, right)
return binary_search_by_recursion(sorted_collection, item, midpoint+1, right)
def __assert_sorted(collection):
"""Check if collection is sorted, if not - raises :py:class:`ValueError`