ejercicio5.js

const arr5 = ["🌶", "🥛", "🌶", "🥛", "🌶", "🥛"];
const result = [];

arr5.map((item, index, array) => {
	/*
	if (item === "🌶" && array[index + 1] === "🥛") {
		//console.log("La 🌶 está aquí: " + index);
		//console.log("La 🥛 está aquí: " + (index + 1));
		//array.splice(index + 1, 1, "🥵");
		result.push(item);
		result.push("🥵");
		//document.write(result);
		//document.write("<br>")
	} else {
		result.push(item);
	}*/
	return item === "🌶" && array[index + 1] === "🥛"
		? result.push(item, "🥵")
		: result.push(item);
});
console.log(result);

//Con bucle FOR + splice
for (let i=0; i<arr5.length; i++) {
    if (arr5[i] == "🌶") {
        arr5.splice(i+1, 0, '🥵');
    }
}
console.log(arr5);