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add ons in string directory - Boyer_Moore_Search#933

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Erfaniaa merged 1 commit into
TheAlgorithms:masterfrom
Dharni0607:issue#697
Jul 2, 2019
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add ons in string directory - Boyer_Moore_Search#933
Erfaniaa merged 1 commit into
TheAlgorithms:masterfrom
Dharni0607:issue#697

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@Dharni0607

@Dharni0607 Dharni0607 commented Jul 1, 2019

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#697, I have added Boyer Moore search function(bad character heuristic). Please review and let me know if any changes are required. Thanks. ;)

@Erfaniaa

Erfaniaa commented Jul 2, 2019

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I think it's "Boyer" Moore Search. If I'm right, please let me change it.

@Erfaniaa Erfaniaa requested review from Erfaniaa and poyea July 2, 2019 08:27
@Dharni0607

Dharni0607 commented Jul 2, 2019 via email

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@Dharni0607 Dharni0607 changed the title add ons in string directory - Bayer_Moore_Search add ons in string directory - Boyer_Moore_Search Jul 2, 2019
@Erfaniaa Erfaniaa removed the request for review from poyea July 2, 2019 08:33

@Erfaniaa Erfaniaa left a comment

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Please make the requested changes.

Comment thread strings/Boyer_Moore_Search.py Outdated
m=length of pattern string
"""

class BayerMooreSearch:

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Please change the dictation mistake in the class name.

Comment thread strings/Boyer_Moore_Search.py Outdated
return currentPos + i
return -1

def badCharacterHeuristic(self):

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Please use snake_case for all methods.
Like: bad_character_heuristic

Comment thread strings/Boyer_Moore_Search.py Outdated
def badCharacterHeuristic(self):
positions = []
for i in range(self.textLen - self.patLen + 1):
misMatchIndex = self.misMatchInText(i)

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Use snake_case: mismatch_index
Try to use it in all variable names.

Comment thread strings/Boyer_Moore_Search.py Outdated
return -1


""" following functions tries to find the mis-matched character's index in text from last,

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Place docstrings after the "def" line.
Explain the parameters and the return value separately.

Please Google "Python docstrings conventions".
https://www.datacamp.com/community/tutorials/docstrings-python#second-head

Comment thread strings/Boyer_Moore_Search.py Outdated
pattern = "ABC"
bms = BayerMooreSearch(text, pattern)
positions = bms.badCharacterHeuristic()
if(len(positions) == 0):

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Unnecessary parentheses

Comment thread strings/Boyer_Moore_Search.py Outdated
print("No match found")
else:
print("Pattern found in following positions: ")
print(positions)

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I ran your code and the algorithm seems to work fine.

@Dharni0607 Dharni0607 force-pushed the issue#697 branch 4 times, most recently from 3377842 to 62d0413 Compare July 2, 2019 11:59
@Erfaniaa Erfaniaa merged commit 27a8184 into TheAlgorithms:master Jul 2, 2019
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3 participants