Logical XOR

Q: How deeply does Classic Computer Science Problems in Swift: Essential techniques for practicing programmers cover logical XOR?

Defines Boolean and bitwise behavior, demonstrates reversibility, and applies it in Swift encryption functions.

As explained in Classic Computer Science Problems in Swift: Essential techniques for practicing programmers

The exclusive-or operation that returns true for exactly one true operand and false when both operands have the same truth value.

Logical XOR, or exclusive OR, is true when exactly one operand is true and false when both operands share the same truth value. At the bit level, it produces 1 for 0 ^ 1 and 1 ^ 0, but 0 for 0 ^ 0 and 1 ^ 1. section 1.3

XOR becomes useful in byte-oriented encryption because its reversible combinations preserve each operand:

A ^ B = C; recombining C with B recovers A, while recombining C with A recovers B. section 1.3
Swift uses ^ for XOR, including element-by-element operations on UInt8 values. section 1.3

One-time pad

encryptOTP() XORs each byte of a String with a randomly generated dummy key and returns the dummy data plus the encrypted product. decryptOTP() XORs those two keys again and converts the resulting bytes back to a String. section 1.3

How Classic Computer Science Problems in Swift: Essential techniques for practicing programmers covers it

Cover of Classic Computer Science Problems in Swift: Essential techniques for practicing programmers

liveBook manning.com

Read Classic Computer Science Problems in Swift: Essential techniques for practicing programmers on liveBook Get the book at manning.com

Also explained in

liveBook manning.com

Math and Architectures of Deep LearningA Boolean operation that outputs true when exactly one of its two binary inputs is true.
liveBook manning.com

The Well-Grounded Rubyist, Fourth EditionBitwise XOR is a binary operation that produces 1 where exactly one corresponding input bit is 1 and produces 0 where both corresponding input bits are equal.

Compare how 3 books explain logical XOR →

Related concepts

boolean operationkind of · A Boolean operation combines or transforms truth-valued inputs according to logical rules to produce a truth-valued result.
CNOT gateimplemented by · A CNOT gate is a two-qubit controlled-NOT gate that flips a target qubit when its control qubit is one.
conditional logicequivalent to · Conditional logic is a programming technique that selects execution paths, actions, or result values according to evaluated conditions.
perceptroncontrasts with · A perceptron is a single-layer computational model and linear classifier that combines weighted inputs with a bias and applies a threshold or activation rule.
one-time padused by · A one-time pad is a symmetric encryption technique that combines plaintext with a truly random, equally long secret key that is never reused.

This explainer was generated by Manning's knowledge graph from the text of Classic Computer Science Problems in Swift: Essential techniques for practicing programmers. The section links point to the parts of the book it draws on.