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¿Cómo "a^=b; b^=a; a^=b;" intercambiar los valores de las variables

Descubrí un buen truco para intercambiar los valores de dos variables sin tener que crear una variable auxiliar. Usaré javascript para ilustrarlo, aunque supongo que es independiente del lenguaje.

 let a = 1; let b = 2; a^=b; b^=a; a^=b; console.log(a); // Prints 2 console.log(b); // Prints 1

¿Alguien puede explicar cómo ocurre el intercambio? ¿Qué hace ^= ?

about 4 years ago · Santiago Trujillo
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