如何在数组上使用array.filter + map

Question

我试图过滤这个数组来获取id并将字符串转换为数字。我想使用过滤器和地图？想知道如何尽可能清楚。

var pets = [ 
    { id: '1', name: 'rupert', readyForHome: 'No', age: 12, personality: ['friendly', 'lazy', 'loving']}, 
    { id: '2', name: 'mrs fluffy', readyForHome: 'Yes', age: 2, personality: ['affectionate', 'playful', 'shy']}, 
    { id: '3', name: 'tabitha', readyForHome: 'Yes', age: 4, personality: ['aggressive', 'independent']}, 
    { id: '4', name: 'lily', readyForHome: 'No', age: 8, personality: ['friendly', 'playful', 'mischievous']}, 
]; 

Answer 1

所有你需要的是map静下心来，一个ID数组作为数字：

pets = pets.map(function(pet) { 
    return Number(pet.id); 
}); 

var pets=[{id:"1",name:"rupert",readyForHome:"No",age:12,personality:["friendly","lazy","loving"]},{id:"2",name:"mrs fluffy",readyForHome:"Yes",age:2,personality:["affectionate","playful","shy"]},{id:"3",name:"tabitha",readyForHome:"Yes",age:4,personality:["aggressive","independent"]},{id:"4",name:"lily",readyForHome:"No",age:8,personality:["friendly","playful","mischievous"]}]; 
 

 
pets = pets.map(function(pet) { 
 
    return Number(pet.id); 
 
}); 
 

 
console.log(pets);

Answer 2

var petIds = pets.map(function (pet) { 
    petId = parseInt(pet.id); 
    return petId; 
});