Estoy tratando de crear una nueva matriz con 5 nombres aleatorios tomados de una matriz con 897 nombres. Esto es lo que traté de hacer, pero no estoy seguro de cómo especificar que solo quiero 5 nombres:
for(let i = 0; i < pokemon.all().length; i++){ pokedex = [i]; }; app.get('/dex', (req, res) => { res.send(pokedex) }); function pickNOf(list, n) { // - create a new shallow array copy. // - does decouple the original reference, thus it // prevents its further mutation by eg `splice`. list = Array.from(list); // - creates and returns an array of the desired length. return Array.from({ length: n }, () => list.splice( // - `splice` does mutate the list by removing a // single item from its randomly chosen index. Math.floor(Math.random() * list.length), 1 )[0]); } const listOfAllPokemonNames = [ "Bulbasaur", "Ivysaur", "Venusaur", "Charmander", "Charmeleon", "Charizard", "Squirtle", "Wartortle", "Blastoise", "Caterpie", "Metapod", "Butterfree", "Weedle", "Kakuna", "Beedrill", "Pidgey" ]; console.log( "pickNOf(listOfAllPokemonNames, 5) ...", pickNOf(listOfAllPokemonNames, 5) ); console.log( "pickNOf(listOfAllPokemonNames, 9) ...", pickNOf(listOfAllPokemonNames, 9) ); console.log( "pickNOf(listOfAllPokemonNames, 3) ...", pickNOf(listOfAllPokemonNames, 3) ); .as-console-wrapper { min-height: 100%!important; top: 0; }El uso dentro del código del OP se ve así ...
function pickNOf(list, n) { list = Array.from(list); return Array.from({ length: n }, () => list.splice( Math.floor(Math.random() * list.length), 1 )[0]); } app.get('/dex', (req, res) => { res.send(pickNOf(pokemon.all(), 5)) });Eche un vistazo a esto, use Math.random() para generar un índice aleatorio y obtenerlo de la matriz de pokemons, luego desactive el valor de pokemons para que no tenga doublon en pokedex.
let pokemons = ['pika1','pika2','pika3','pika4','pika5','pika6','pika7'] let pokedex = []; for (i = 0; i < 5; i++) { id = Math.floor(Math.random() * pokemons.length); pokedex.push(pokemons[id]); pokemons.slice(i,1) } //app.send() here... console.log(pokedex) EDITAR: Teniendo en cuenta que tiene un pokemon.random() generator(?) En este paquete npm. Simplemente use:
let pokedex = []; for(let i = 0; i < 5; i++) pokedex.push(pokemon.random()); app.get('/dex', (req, res) => { res.send(pokedex) });EDIT N°2: Uso de objetos
let pokedex = []; for (i = 0; i < 5; i++) { let pokemon = { name:pokemon.random(), attack:Math.floor(Math.random() * (100 - 50 + 1) +50), defense:Math.floor(Math.random() * (100 - 50 + 1) +50) }; pokedex.push(pokemon); } function attack(attacker,defenser) { defenser.defense -= attacker.attack return attacker && defenser; } function fakeMatch(attacker,defenser) { attack(attacker,defenser) } console.log(pokedex) fakeMatch(pokedex[0],pokedex[3]) console.log('RESULT Pokedex 0 attacked Pokedex 3') console.log(pokedex)EDIT N°3: Objeto con función (forma correcta)
let pokemons = ['pika1', 'pika2', 'pika3', 'pika4', 'pika5', 'pika6', 'pika7'] let pokedex = []; for (i = 0; i < 5; i++) { let id = Math.floor(Math.random() * pokemons.length); let pkm = { name: pokemons[id], life: 100, strenght: Math.floor(Math.random() * (100 - 50 + 1) + 50), defense: Math.floor(Math.random() * (100 - 50 + 1) + 50), attack: function(target) { target.life -= this.strenght; console.log(this.name + ' attack ' + target.name) console.log(target.name + ' loose ' + this.strenght + ' of life') //Test if life > 0 or anything else with % defense etc... if (target.life <= 0) { console.log(target.name + ' is dead') } } }; pokedex.push(pkm); pokemons.slice(id, 1) } pokedex[0].attack(pokedex[1]);