如何在数组上分配和迭代一次？

Question

如果这是重复的，请随时标记此问题，如果您有更好的标题，请随时改写标题。我不知道标题怎么写。我有 2 个不同的数组。第一个数组包含一组用户，第二个数组包含一组头像。值得一提的是，化身阵列总是比用户大。我需要为每个用户配对一个头像。每个用户不应有相同的头像，每个头像应与用户的性别相匹配。我怎样才能做到这一点？

avatars = [
    {
        "id" : 1,
        "image" : "maleavatar1",
        "gender": "male"
    },
    {
        "id" : 2,
        "image" : "maleavatar2",
        "gender": "male"
    },
    {
        "id" : 3,
        "image" : "maleavatar3",
        "gender": "male"
    },
    {
        "id" : 4,
        "image" : "femaleavatar1",
        "gender": "female"
    },
    {
        "id" : 5,
        "image" : "femaleavatar2",
        "gender": "female"
    },
    {
        "id" : 6,
        "image" : "femaleavatar3",
        "gender": "female"
    },
    {
        "id" : 7,
        "image" : "femaleavatar4",
        "gender": "female"
    },

]
users = [
    {
        "id" : 1,
        "name" : "Manila",
        "gender": "female"
    },
    {
        "id" : 2,
        "name" : "Josy",
        "gender": "female"
    },
    {
        "id" : 3,
        "name" : "Eliza",
        "gender": "female"
    },
    {
        "id" : 4,
        "name" : "Martin",
        "gender": "male"
    },
    {
        "id" : 5,
        "name" : "Mark",
        "gender": "male"
    },
    {
        "id" : 6,
        "name" : "John",
        "gender": "male"
    }

]

var count = 0;
var randUser = '';
var randos = [];
var b_s = users.length;
var a_s = avatars.length;

users.forEach(function(user){count++
    
avatars.forEach(function(avatar){

if(avatar.gender === user.gender){

randUser = {

    "name" : user.name,
    "avatar" : avatar.image,
    "gender" : user.gender


}

  //push users
randos.push(randUser);

}

})

})
console.log(randos);

Answer 1

这是一个很好的做法，当您听到“无重复的随机”时，想想“随机播放”。

因此，要分配随机的、不重复的、正确性别化的头像，按性别隔离头像，混洗男性和女性头像，然后按顺序将它们分配给用户....

const avatars = getAvatars();  // just to move the data to the bottom of the snippet
const users = getUsers();

const shuffledMales = shuffle(avatars.filter(a => a.gender==="male"));
const shuffledFemales = shuffle(avatars.filter(a => a.gender==="female"));

let maleIndex = 0, femaleIndex = 0;
users.forEach(user => {
  user.avatar = user.gender === "male" ? shuffledMales[maleIndex++] : shuffledFemales[femaleIndex++];
});

console.log(users);

// fisher-yates shuffle, adapted from https://bost.ocks.org/mike/shuffle/
function shuffle(array) {
  let copy = [],
    n = array.length,
    i;
  while (n) {
    let i = Math.floor(Math.random() * array.length);
    if (i in array) {
      copy.push(array[i]);
      delete array[i];
      n--;
    }
  }
  return copy;
}

function getAvatars() {
  return [{
      "id": 1,
      "image": "maleavatar1",
      "gender": "male"
    },
    {
      "id": 2,
      "image": "maleavatar2",
      "gender": "male"
    },
    {
      "id": 3,
      "image": "maleavatar3",
      "gender": "male"
    },
    {
      "id": 4,
      "image": "femaleavatar1",
      "gender": "female"
    },
    {
      "id": 5,
      "image": "femaleavatar2",
      "gender": "female"
    },
    {
      "id": 6,
      "image": "femaleavatar3",
      "gender": "female"
    },
    {
      "id": 7,
      "image": "femaleavatar4",
      "gender": "female"
    },
  ];
}

function getUsers() {
  return [{
      "id": 1,
      "name": "Manila",
      "gender": "female"
    },
    {
      "id": 2,
      "name": "Josy",
      "gender": "female"
    },
    {
      "id": 3,
      "name": "Eliza",
      "gender": "female"
    },
    {
      "id": 4,
      "name": "Martin",
      "gender": "male"
    },
    {
      "id": 5,
      "name": "Mark",
      "gender": "male"
    },
    {
      "id": 6,
      "name": "John",
      "gender": "male"
    }
  ];
}

如何在数组上分配和迭代一次？

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