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January 1, 2016 08:29
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| def binary_search(num, array, offset = 0) | |
| mid = (array.length - 1)/2 | |
| if array[mid] == num | |
| return mid + offset | |
| end | |
| if array[mid] < num | |
| offset += mid + 1 | |
| binary_search(num, array[(mid + 1).. -1], offset) | |
| elsif array[mid] > num | |
| binary_search(num, array[0..(mid - 1)], offset) | |
| end | |
| end | |
| array = (101..200).to_a | |
| p binary_search(112, array) | |
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