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Questions - xor

Why does my SQL trigger that simulates an XOR not work?

I want to have a condition that either the artist or the event in an assignment is null, but it rejects an assignment even though it has an artist. The trigger: delimiter $$ CREATE TRIGGER assignment_...
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Tobias Hahn

mysql

sql

triggers

xor

Votes: 0

Answers: 1

Latest Answer

According to your comment, both event and artist are part of the primary key: CREATE TABLE assignment ( edition YEAR NOT NULL, festival VARCHAR(200) NOT NULL, event INT, artist...
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Solarflare

Shifting all element positions of an array in Python given by XOR operator

I would like to know if there is a way to move all elements of a numpy array without iterating over each entry. The shift I desire is to relabel the indices by a fixed XOR operation, in the following ...
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Alonso Viladomat

python

arrays

numpy

vectorization

xor

Votes: 0

Answers: 1

Latest Answer

There is simply no reason to use a loop here at all. You are not shifting anything, and the problem is completely separable across the axes: x = np.arange(2**(2 * N)).reshape(2**N, 2**N) z = x[np.aran...
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Mad Physicist

how to decrypt a string that is encrypted using XOR

I have tried to encrypt a string using a XOR operator and took the output in alphabets. Now when I am trying to decrypt it I'm not getting the string again. Encryption code: string= "Onions"...
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Ayesha Zahid

python-3.x

encryption

xor

Votes: 0

Answers: 1

Latest Answer

The algorithm does not perform a pure XOR, but maps values conditionally to another value, leading to a relation that is no longer bijective. To illustrate this point. See what this script outputs: ke...
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trincot

Maximize XOR Equation

Problem statement: Given an array of n elements and an integer k, find an integer x in the range [0,k] such that Xor-sum(x) is maximized. Print the maximum value of the equation. Xor-sum(x)=(x XOR A1...
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infernus-85

c++

algorithm

bit-manipulation

xor

Votes: 0

Answers: 5

Latest Answer

The trick here is that XOR works on bits in parallel, independently. You can optimize each bit of x. Brute-forcing this takes 2*32 tries, given the constraints.
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MSalters

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