Javascript 优化将对象键值推送到数组的循环

我有一个包含问题的对象，每个问题都有不同的难度，用

allquick[x]表示。难度

我已经为循环编写了一个

，它将根据问题的相对难度类别对问题进行排序。例如难度25=容易，难度50=中等等等

以下是对象结构的一部分：

 {
    "id": "41",
    "category": "TV & Movies",
    "locales": "GB#US",
    "difficulty": "50",
    "question": {
       "Voice": "Which fictional city is the home of Batman?",
       "Display": "Which fictional city is the home of Batman?"
    },
    "answer": {
       "Voice": "Gotham City",
       "Display": "Gotham City"
    }
 },
 {
    "id": "42",
    "category": "TV & Movies",
    "locales": "GB#US",
    "difficulty": "50",
    "question": {
       "Voice": "The Hunchback of Notre Dame was also known as?",
       "Display": "The Hunchback of Notre Dame was also known as?"
    },
    "answer": {
       "Voice": "Quasimodo",
       "Display": "Quasimodo"
    }
 },
 {
    "id": "43",
    "category": "TV & Movies",
    "locales": "GB#US",
    "difficulty": "75",
    "question": {
       "Voice": "The title role of the 1990 movie Pretty Woman was played by which actress?",
       "Display": "The title role of the 1990 movie Pretty Woman was played by which actress?"
    },
    "answer": {
       "Voice": "Julia Roberts",
       "Display": "Julia Roberts"
    }
 },
 {
    "id": "44",
    "category": "TV & Movies",
    "locales": "GB#US",
    "difficulty": "75",
    "question": {
       "Voice": "Which Tom Hanks movie won the Academy Award for Best Picture in 1994?",
       "Display": "Which Tom Hanks movie won the Academy Award for Best Picture in 1994?"
    },
    "answer": {
       "Voice": "Forrest Gump",
       "Display": "Forrest Gump"
    }
 },
 {
    "id": "45",
    "category": "TV & Movies",
    "locales": "GB#US",
    "difficulty": "100",
    "question": {
       "Voice": "Jonny Depp starred as Jack Sparrow in which series of movies?",
       "Display": "Jonny Depp starred as Jack Sparrow in which series of movies?"
    },
    "answer": {
       "Voice": "Pirates of the Caribbean",
       "Display": "Pirates of the Caribbean"
    }
 },
 {
    "id": "46",
    "category": "TV & Movies",
    "locales": "GB#US",
    "difficulty": "100",
    "question": {
       "Voice": "Marion Crane is the tragic figure in which cult horror film?",
       "Display": "Marion Crane is the tragic figure in which cult horror film?"
    },
    "answer": {
       "Voice": "Psycho",
       "Display": "Psycho"
    }
 },


    {
        "id": "47",
        "category": "Science & Technology",
        "locales": "GB#US",
        "difficulty": "25",
        "question": {
           "Voice": "Alexander Graham Bell invented which communication tool?",
           "Display": "Alexander Graham Bell invented which communication tool?"
        },
        "answer": {
           "Voice": "Telephone",
           "Display": "Telephone"
        }
     },
 {
        "id": "48",
        "category": "Science & Technology",
        "locales": "GB#US",
        "difficulty": "75",
        "question": {
           "Voice": "Steve jobs was the founder of which tech giant?",
           "Display": "Steve jobs was the founder of which tech giant?"
        },
        "answer": {
           "Voice": "Apple",
           "Display": "Apple"
        }
     },
     {
        "id": "49",
        "category": "Science & Technology",
        "locales": "GB#US",
        "difficulty": "75",
        "question": {
           "Voice": "Which year was Amazon founded?",
           "Display": "Which year was Amazon founded?"
        },
        "answer": {
           "Voice": "1994",
           "Display": "1994"
        }
     },
     {
        "id": "50",
        "category": "Science & Technology",
        "locales": "GB#US",
        "difficulty": "100",
        "question": {
           "Voice": "What is the natural habitat of an arboreal creature?",
           "Display": "What is the natural habitat of an arboreal creature?"
        },
        "answer": {
           "Voice": "Trees",
           "Display": "Trees"
        }
     },
     {
        "id": "51",
        "category": "Science & Technology",
        "locales": "GB#US",
        "difficulty": "25",
        "question": {
           "Voice": "What is a geiger counter used to detect?",
           "Display": "What is a geiger counter used to detect?"
        },
        "answer": {
           "Voice": "Radiation",
           "Display": "Radiation"
        }
     },
     {
        "id": "52",
        "category": "Science & Technology",
        "locales": "GB#US",
        "difficulty": "50",
        "question": {
           "Voice": "What element on the periodic table has the chemical symbol H?",
           "Display": "What element on the periodic table has the chemical symbol H?"
        },
        "answer": {
           "Voice": "Hydrogen",
           "Display": "Hydrogen"
        }
     },
     {
        "id": "53",
        "category": "Science & Technology",
        "locales": "GB#US",
        "difficulty": "50",
        "question": {
           "Voice": "What is the more common name for Nitrous Oxide? �",
           "Display": "What is the more common name for Nitrous Oxide? �"
        },
        "answer": {
           "Voice": "Laughing gas",
           "Display": "Laughing gas"
        }
     },
     {
        "id": "54",
        "category": "Science & Technology",
        "locales": "GB#US",
        "difficulty": "75",
        "question": {
           "Voice": "In computing, how many bits are in a byte?",
           "Display": "In computing, how many bits are in a byte?"
        },
        "answer": {
           "Voice": "Eight",
           "Display": "Eight"
        }
     },
     {
        "id": "55",
        "category": "Science & Technology",
        "locales": "GB#US",
        "difficulty": "50",
        "question": {
           "Voice": "Who discovered Penicillin?",
           "Display": "Who discovered Penicillin?"
        },
        "answer": {
           "Voice": "Alexander Fleming",
           "Display": "Alexander Fleming"
        }
     },
     {
        "id": "56",
        "category": "Science & Technology",
        "locales": "GB#US",
        "difficulty": "25",
        "question": {
           "Voice": "Which planet in our solar system is closest to the sun?",
           "Display": "Which planet in our solar system is closest to the sun?"
        },
        "answer": {
           "Voice": "Mercury",
           "Display": "Mercury"
        }
     },
     {
        "id": "57",
        "category": "Science & Technology",
        "locales": "GB#US",
        "difficulty": "25",
        "question": {
           "Voice": "What subject did Mark Zuckerburg study at university?",
           "Display": "What subject did Mark Zuckerburg study at university?"
        },
        "answer": {
           "Voice": "Computer Science",
           "Display": "Computer Science"
        }
     },

以下是我的尝试：

var allQuiz= myObject;

var easyQuiz =[];
var mediumQuiz =[];
var hardQuiz =[];
var veryhardQuiz =[];


for(let x=0;x<allQuiz.length;x++){

    if(allQuiz[x].difficulty==25){
        let tmp = [];
        tmp.push((allQuiz[x]).id);
    tmp.push((allQuiz[x]).question.Display);
    tmp.push((allQuiz[x]).answer.Display);
    easyQuiz.push(tmp);
}
else if(allQuiz[x].difficulty==50){
    let tmp =[];
    tmp.push((allQuiz[x]).id);
    tmp.push((allQuiz[x]).question.Display);
    tmp.push((allQuiz[x]).answer.Display);
    mediumQuiz.push(tmp);

}
else if(allQuiz[x].difficulty==75){
    let tmp =[];
    tmp.push((allQuiz[x]).id);
    tmp.push((allQuiz[x]).question.Display);
    tmp.push((allQuiz[x]).answer.Display);
    hardQuiz.push(tmp);

}
else {
    let tmp = [];
    tmp.push((allQuiz[x]).id);
    tmp.push((allQuiz[x]).question.Display);
    tmp.push((allQuiz[x]).answer.Display);
    veryhardQuiz.push(tmp);
} 
}

var allquick=myObject；
var EasyQuit=[]；
var mediumquick=[]；
var hardquick=[]；
var veryhardquick=[]；
for（让x=0；x
数组。reduce
对于此类数据转换任务来说是一个方便的函数。其思想是创建一个对象，该对象由映射到一个值数组的难度决定。最后，生成的对象可以拆分为您所需的四个结构或按原样使用（如果您愿意，可以使用从难度数字到难度单词的键映射）


var allquick=[{“id”：“41”，“category”：“TV&Movies”，“locales”：“GB#US”，“难度”：“50”，“问题”：{“Voice”：“哪个虚拟城市是蝙蝠侠的家？”，“Display”：“哪个虚拟城市是蝙蝠侠的家？”，”回答：{“Voice”：“Gotham city”，“Display”：“Gotham city”}，{“id”：“42”，“category”：“TV&Movies”，“locales”问题：{“声音”：“圣母院的驼背也被称为？”，“展示”：“圣母院的驼背也被称为？”，“回答：{“声音”：“卡西莫多”，“展示”：“卡西莫多”}，{“id”：“43”，“类别”：“电视和电影”，“地点”：“英国”；“美国”；“难度”：“75”，“问题”：{“声音”：“1990年电影《美丽女人》的标题角色由哪位女演员扮演？”，“展示”：“1990年电影《美丽女人》的标题角色由哪位女演员扮演？”，“回答：{“声音”：“朱莉娅·罗伯茨”，“展示”：“朱莉娅·罗伯茨”}}，{“id”：“44”，“类别”：“电视与电影”，“地区”：“GB#US”，“难度”：“75”，“问题”：{“声音”：”汤姆·汉克斯的哪部电影获得了1994年奥斯卡最佳影片奖？，“展示”：“汤姆·汉克斯的哪部电影获得了1994年奥斯卡最佳影片奖？”，“回答”：{“声音”：“阿甘”，“展示”：“阿甘”}，{“id”：“45”，“类别”：“电视和电影”，“地区”：“美国”，“难度”：“100”，“问题”：{“声音”：”乔尼·德普在哪部电影系列中饰演杰克·斯派洛？，“展示”：“乔尼·德普在哪部电影系列中饰演杰克·斯派洛？”，“回答”：{“声音”：“加勒比海盗”，“展示”：“加勒比海盗”}，{“id”：“46”，“类别”：“电视和电影”，“地区”：“美国”，“困难”：“100”，“问题”：{“声音”：”Marion Crane是哪个邪教恐怖片中的悲剧人物？，“展示”：“Marion Crane是哪个邪教恐怖片中的悲剧人物？”，“回答”：{“声音”：“心理”，“展示”：“心理”}，{“id”：“47”，“类别”：“科学技术”，“地点”：“美国”，“困难”：“25”，“问题”：{“声音”：”亚历山大·格雷厄姆·贝尔发明了哪种通信工具？，“显示”：“亚历山大·格雷厄姆·贝尔发明了哪种通信工具？”，“回答”：{“声音”：“电话”，“显示”：“电话”}，{“id”：“48”，“类别”：“科学技术”，“地区”：“美国”，“困难”：“75”，“问题”：{“声音”：史蒂夫·乔布斯是哪家科技巨头的创始人？，“显示器”：“史蒂夫·乔布斯是哪家科技巨头的创始人？”，“回答”：{“声音”：“苹果”，“显示器”：“苹果”}，{“id”：“49”，“类别”：“科学技术”，“地区”：“美国”，“困难”：“75”，“问题”：{“声音”：“亚马逊成立于哪一年？”，“显示器”：”亚马逊成立于哪一年？}，“回答：{“声音”：“1994”，“展示”：“1994”}，{“id”：“50”，“类别”：“科学与技术”，“地点”：“GB#US”，“难度”：“100”，“问题”：{“声音”：“树栖生物的自然栖息地是什么？”，“展示”：“树栖生物的自然栖息地是什么？”}，“回答：{“声音”：”“树”，“显示”：“树”}，{“id”：“51”，“类别”：“科学与技术”，“地区”：“GB#US”，“难度”：“25”，“问题”：{“声音”：“盖革计数器用于检测什么？”，“显示”：“盖革计数器用于检测什么？”}，{“声音”：“辐射”，“显示”：“辐射”}，{“id”：“52”，“类别”：”科学与技术，“地区”：“GB#US”，“难度”：“50”，“问题”：{“声音”：“周期表上的什么元素有化学符号H？”，“显示”：“周期表上的什么元素有化学符号H？”，“回答”：{“声音”：“氢”，“显示”：“氢”}，{“id”：“53”，“类别”：“科学与技术”，“地区”“：“GB#US”，“难度”：“50”，“问题”：{“声音”：“氧化亚氮更常见的名称是什么？”？�", "显示“：“一氧化二氮更常见的名称是什么？�" }, "答案：{“语音”：“笑气”，“显示”：“笑气”}，{“id”：“54”，“类别”：“科学与技术”，“地区”：“GB#US”，“难度”：“75”，“问题”：{“语音”：“在计算中，一个字节有多少位？”，“显示”：“在计算中，一个字节有多少位？”}，答案：{“语音”：“八”，“显示”：“八”}，{“id”：“55”，“类别”：“科学与技术”，“地点”：“GB#US”，“难度”：“50”，“问题”：{“声音”：“谁发现了青霉素？”，“显示”：“谁发现了青霉素？”，“回答”：{“声音”：“亚历山大·弗莱明”，“显示”：“亚历山大·弗莱明”}，{“id”：“56”，“类别”：“科学与技术”，“地点”：“GB#US”，“难度”：“25”问题：{“声音”：“我们太阳系中哪颗行星离太阳最近？”，“显示”：“我们太阳系中哪颗行星离太阳最近？”，“回答：{“声音”：“水星”，“显示”：“水星”}}，{“id”：“57”，“类别”：“科学技术”，“地点”：“美国”，“困难”：“25”，“问题”：“声音”：”马克·扎克伯格在大学学习了什么科目？，“显示”：“马克·扎克伯格在大学学习了什么科目？”，“回答：{“声音”：“计算机科学”，“显示”：“计算机科学”
var allQuiz= myObject;
var quizzesByDifficulty = { 25: [], 50: [], 75: [], 100: [] };
for(var x in allQuiz)
{
  var quiz = allQuiz[x];
  var quizzes = quizzesByDifficulty[quiz.difficulty];
  quizzes.push([
    quiz.id,
    quiz.question.Display,
    quiz.answer.Display
  ]);
}

var easy = quizzesByDifficult[25];
var medium = quizzesByDifficulty[50];
// etc.

var allQuiz= myObject;
var quizzesByDifficulty = {};
for(var x in allQuiz)
{
  var quiz = allQuiz[x];

  if (!quizzesByDifficulty[quiz.difficulty]) {
    quizzesByDifficulty[quiz.difficulty] = [];
  }

  var quizzes = quizzesByDifficulty[quiz.difficulty];
  quizzes.push([
    quiz.id,
    quiz.question.Display,
    quiz.answer.Display
  ]);
}