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Sunday, November 1, 2020

Solution Exercise 78 : python algorithm that find all index of an occurrence in given string
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Exercise 78 **

Write a python algorithm which returns the list of all index where an occurrence occ is found within a given string s without using any predefined method as find(), rfind() , index()... The function returns the empty list [], if occ does not exist in s.
Example:
s = "Python is an interpreted language. Python is open source. Python is easy to learn"
occ = "Python" , the algorithm returns the list: [0, 35, 58]

Solution

def indexOfOccurrence(s , occ):
    # getting the length of the occurrence occ and the len of the string s 
    m = len(occ)
    n = len(s)

    # initializing the list of index
    listIndex = []
    # searching all indx of occurrence occ within the string s
    for i in range(0 , n-m):
        if s[i : m + i] == occ:
            listIndex.append(i)
    return listIndex

# Example:
s = "Python is an interpreted language. Python is open source. Python is easy to learn"
occ = "Python"
print(indexOfOccurrence(s, occ)) 
# The output is: [0, 35, 58]


Younes Derfoufi
my-courses.net

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Younes Derfoufi

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