Eliminar el valor duplicado del mapa React JS
var sandwiches = ['turkey', 'ham', 'turkey', 'tuna', 'pb&j', 'ham', 'turkey', 'tuna'];
var deduped = Array.from(new Set(sandwiches));
// Logs ["turkey", "ham", "tuna", "pb&j"]
console.log(deduped);
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