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bitwise

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Mia von Steinkirch 2019-05-12 18:00:11 -07:00
parent fa83f7e42a
commit 0d5e21b867
9 changed files with 148 additions and 2 deletions
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interview_cake/bitwise_stuff/get_bit.py Normal file
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#!/usr/bin/python
''' Set a bit in a binary number:
1) Shifts 1 over by i bits
2) make an OR with the number, only the value at bit i will change and all the others bit
of the mask are zero so will not affect the num
'''
def set_bit(num, i):
mask = 1 << i
return bin( num | mask )
if __name__ == '__main__':
num = int('0100100', 2)
print set_bit(num, 0) #'0b100101'
print set_bit(num, 1) #'0b100110'
print set_bit(num, 2) # nothing change '0b100100'
print set_bit(num, 3) #'0b101100'
print set_bit(num, 4) #'0b110100'
print set_bit(num, 5) # nothing change '0b100100'