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Add binary_search_index method for using a block to find an index #10

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Add binary_search_index method for using a block to find an index #10

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9e39aba
Add binary_search_index method for using a block to find an index
mjc-gh Aug 11, 2015
b0b1d80
Fix idx calculation
mjc-gh Aug 12, 2015
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6 changes: 5 additions & 1 deletion lib/binary_search/pure.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,10 @@ def binary_search(&block)
index = binary_chop(&block)
index ? self[index] : nil
end

def binary_search_index(&block)
binary_chop(&block)
end

private

Expand All @@ -15,7 +19,7 @@ def binary_chop(&block)
lower = 0

while(upper >= lower) do
idx = lower + (upper - lower) / 2
idx = lower + ((upper - lower) / 2)
comp = yield self[idx]

if comp == 0
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