我有一个名为 move_dict 的对象，并且正在使用方法 get_learned_by_pokemon() 来填充它。在 getPokes() 我调用 get_learned_by_pokemon() 并期望 move_dict 被填充。然而它是空的。
function move(){
let move_dict = {}
let db_data = JSON.parse(fs.readFileSync('pokes.json', 'utf8'));
async function get_learned_by_pokemon(curr_move, move_dict, current_poke){
response = await axios.get('https://pokeapi.co/api/v2/move/'.concat(curr_move))
let learned_by_pokemons = []
for (let k = 0; k < response.data.learned_by_pokemon.length; k++){
learned_by_pokemons.push(response.data.learned_by_pokemon[k].name)
}
// pass
if (learned_by_pokemons.includes(current_poke)){move_dict[current_poke].pass.push(curr_move)}
// fail
else{move_dict[current_poke].fail.push(curr_move)}
}
function getPokes(){
//iterate through all pokemon
for (let i = 0; i < db_data.length; i++){
let current_poke = db_data[i].name
let moves = db_data[i].moves
move_dict[current_poke] = {pass: [], fail: []}
//iterate through all moves of pokemon
for (let j = 0; j < moves.length; j++){
let curr_move = moves[j]
//get data on current move
get_learned_by_pokemon(curr_move, move_dict, current_poke)
}
}
}
getPokes()
}我还在 Axios.get() 之前使用了 await 。我想知道为什么 move_dict 没有填充，我想在不使用 setTimeout() 的情况下克服这个问题
回答1
看起来 OP 以描述口袋妖怪的 json 文件开头。从代码来看，该文件至少包含以下内容......
[
{ name: 'nameA', moves: [ 1, 2, 3, ... ] },
{ name: 'nameB', moves: [ 3, 4, 5, ... ] },
...
]看起来有一个 api 端点进行移动（“id 或名称”）并返回除其他外，已“学习”该移动的 pokemon 列表。
看起来OP旨在制作这样的字典......
{
nameA: { pass: [1, 2, ...], fail: [3, 4, ...] },
nameB: { pass: [3, 4, ...], fail: [4, 5, ...] },
...
}...在输入文件中找到的通过和失败数组移动的位置根据 api 移动或未学习移动。
由于我们不想重复调用 api，并且由于输入文件中可能存在冗余动作，因此值得创建一个中间结构，将输入中的独特动作与学习它们的口袋妖怪相关联，就像这样。 ..
{ // key is a move id or name, value is an array of pokemon names
1 : [ 'nameA', 'nameB', ... ],
2 : [ 'nameC', 'nameD', ... ],
...
}所以这就是我在代码中描述这个想法的方式（未编译或测试）......
async function get_learned_by_pokemon(move){
const response = await axios.get(`https://pokeapi.co/api/v2/move/${move}`);
return response.data.learned_by_pokemon.map(p => p.name);
}
async function move() {
let db_data = JSON.parse(fs.readFileSync('pokes.json', 'utf8'));
let allMoves = db_data.flat_map(p => p.moves);
let uniqueMoves = [...new Set(allMoves)];
// map move ids to pokemons who learned the moves { moveId: [ 'pokeA', 'pokeB' ...], ...}
let learnedBy = {}
for (let move in uniqueMoves) {
learnedBy[move] = await get_learned_by_pokemon(move);
}
// map pokemon names to a pair of arrays indicating if they have learned their moves (pass) or not (fail)
let move_dict = db_data.reduce((acc, p) => {
let name = p.name;
let pass = p.moves.filter(move => learnedBy[move].includes(name));
let fail = p.moves.filter(move => !learnedBy[move].includes(name));
acc[name] = { pass, fail };
return acc;
}, {});
return move_dict;
}回答2
您的代码有 2 个错误。 1：你在哪里调用 getPokes() ？ 2: get_learned_by_pokemon 是异步函数，所以如果你想等待它完成，你必须使用 await