javascript - 迭代数组对象

Question

我正在尝试编写一个函数，将“弱点”作为输入并给出所有具有该弱点的神奇宝贝的名称。

考虑以下 JSON:

访问https://raw.githubusercontent.com/Biuni/PokemonGO-Pokedex/master/pokedex.json

var pokemonWeakness = function(weaknessOfPokemon,allPokemon){
    for( x in allPokemon){
        if(weaknessOfPokemon==allPokemon[x].weaknesses){
            console.log('pokemon with this weaknesses are: '+allPokemon[x].name)
        }else{
            null
        }
    }
}

var weaknessOfPokemon = prompt('enter the weaknesses of pokemon')
pokemonWeakness(weaknessOfPokemon,pokemonData.pokemon)

这个函数的问题是没有返回任何数据。

Answer 1

Filter通过检查它们的 weaknesses 数组 includes 来得到 pokemon 数组weaknessOfPokemon。使用 Array.map()将名称提取到数组:

function findByPokemonWeakness(weaknessOfPokemon, pokemons){
  return pokemons.filter((o) => o.weaknesses.includes(weaknessOfPokemon))
    .map((o) => o.name);
}

fetch('https://raw.githubusercontent.com/Biuni/PokemonGO-Pokedex/master/pokedex.json')
  .then(r => r.json())
  .then(d => console.log(findByPokemonWeakness('Fire', d.pokemon)));