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Commit454682b

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Merge pull requestabranhe#16 from dieterpl/master
Added fibonacci search
2 parents18e59a8 +ce87b43 commit454682b

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7 files changed

+92
-7
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7 files changed

+92
-7
lines changed

‎allalgorithms/searches/__init__.py‎

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from .binary_searchimport*
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from .fibonacci_searchimport*
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from .jump_searchimport*
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# -*- coding: UTF-8 -*-
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#
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# Fibonacci search works for a sorted array.
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# The All ▲lgorithms library for python
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#
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# Contributed by: dieterpl
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# Github: @dieterpl
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#
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deffibonacci_search(arr,query):
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fib2,fib1=0,1
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fib=fib2+fib1
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hi=len(arr)-1
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whilefib<=hi:
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fib2=fib1
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fib1=fib
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fib=fib2+fib1
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offset=-1
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whilefib>1:
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i=min(offset+fib2,hi)
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ifarr[i]<query:
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fib=fib1
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fib1=fib2
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fib2=fib-fib1
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offset=i
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elifarr[i]>query:
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fib=fib2
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fib1=fib1-fib2
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fib2=fib-fib1
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else:
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returni
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iffib1andarr[offset+1]==query:
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returnoffset+1
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returnNone

‎changelog.md‎

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@@ -8,11 +8,12 @@ Date: October 9, 2018
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###Algorithms:
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-###Sorting
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- Bubble Sort
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-###Searches
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- Merge Sort
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-###Sorting
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- Bubble Sort
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#Version`0.0.1`
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Date: TO ADDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD, 2018
@@ -22,10 +23,13 @@ Date: TO ADDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD, 2018
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Added:
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-###Searches
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- Fibonacci Search
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- Jump Search
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-###Sorting
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- Bubble Sort
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- Cocktail Shaker Sort
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- Insertion Sort
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- Pigeonhole Sort
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- Selection Sort
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- Stooge Sort
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- Jump Search
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- Stooge Sort

‎docs/readme.md‎

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-###Searches
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-[Binary Search](searches/binary-search)
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-[Fibonacci Search](searches/fibonacci-search)
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-[Jump Search](searches/jump-search)
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-###Sorting
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-[Bubble Sort](sorting/bubble-sort)

‎docs/searches/fibonacci-search.md‎

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#Fibonacci Search
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In computer science, the Fibonacci search technique is a method of searching a sorted array using a divide and conquer algorithm that narrows down possible locations with the aid of Fibonacci numbers. (Wikipedia)
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##Install
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```
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pip install allalgorithms
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```
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##Usage
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```py
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from allalgorithms.searchesimport fibonacci_search
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arr= [-2,1,2,7,10,77]
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print(fibonacci_search(arr,7))
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# -> 3
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print(fibonacci_search(arr,3))
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# -> None
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```
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##API
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###fibonacci_search(array, query)
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>Return array index if its found, otherwise returns`None`
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#####Params:
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-`array`: Sorted Array
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-`query`: Element to search for in the array

‎readme.md‎

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-###Searches
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-[Binary Search](https://python.allalgorithms.com/searches/binary-search)
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-[Fibonacci Search](https://python.allalgorithms.com/searches/fibonacci-search)
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-[Jump Search](https://python.allalgorithms.com/searches/jump-search)
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-###Sorting
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-[Bubble Sort](https://python.allalgorithms.com/sorting/bubble-sort)
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-[Cocktail Shaker Sort](https://python.allalgorithms.com/sorting/cocktail-shaker-sort)

‎tests/test_searches.py‎

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importunittest
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3-
fromallalgorithms.searchesimport (binary_search,jump_search)
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fromallalgorithms.searchesimport (
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binary_search,
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fibonacci_search,
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jump_search
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)
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classTestSearches(unittest.TestCase):
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self.assertEqual(None,binary_search(arr,8))
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self.assertEqual(None,binary_search(arr,-1))
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deftest_fibonacci_search(self):
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arr= [1,2,3,7,10,19,27,77]
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self.assertEqual(3,fibonacci_search(arr,7))
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self.assertEqual(7,fibonacci_search(arr,77))
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self.assertEqual(None,fibonacci_search(arr,8))
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self.assertEqual(None,fibonacci_search(arr,-1))
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deftest_jump_search(self):
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arr= [1,2,3,7,10,19,27,77]
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self.assertEqual(3,binary_search(arr,7))
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self.assertEqual(7,binary_search(arr,77))
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self.assertEqual(None,binary_search(arr,8))
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self.assertEqual(None,binary_search(arr,-1))
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if__name__=='__main__':
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unittest.main()

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