te comparto la mia:
const carta = 'bici coche balón _playstation bici coche peluche'; function listGifts(letter) { const arrCarta = letter.split(" "); return arrCarta.filter((regalo) => { let value = regalo.startsWith("_") if (value !== true && regalo !=="") return regalo !== value }) .reduce((contador, regalo) => { contador[regalo] = (contador[regalo] || 0) + 1; return contador }, {}); } const regalos = listGifts(carta) console.log(regalos)
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te comparto la mia: