将多个数组组合成以第一数组项为关键字的对象

combining multiple arrays into an object with first array items as the key

本文关键字：数组 关键字 对象 组合      更新时间：2023-09-26

我有以下数组

var category = ['Guitar', 'Bass', 'Amps'];

var platform_a = ['platform-a1','platform-a2','platform-a3'];
var platform_b = ['platform-b1','platform-b2','platform-b3'];
var platform_c = ['platform-c1','platform-c2','platform-c3'];

我想把它们转换成一个json，看起来应该像这个

{
    "Guitar":["platform-a1","platform-a2","platform-a3"],
    "Bass":["platform-b1","platform-b2","platform-b3"],
    "Amp":["platform-c1","platform-c2","platform-c3"]
}

我该怎么做？我必须在纯javascript 中执行此操作

让我们为您的案例介绍三种不同的方法：

第一个

如果您只想用数据创建json对象，请尝试：

http://jsfiddle.net/csdtesting/tap2xom9/

var platform_a = ['platform-a1', 'platform-a2', 'platform-a3'];
var platform_b = ['platform-b1', 'platform-b2', 'platform-b3'];
var platform_c = ['platform-c1', 'platform-c2', 'platform-c3'];
var category = ['Guitar', 'Bass', 'Amps'];
var obj = {
  Guitar: platform_a,
  Bass: platform_b,
  Amps: platform_c
};
document.write(JSON.stringify(obj));

第二次

如果你想动态创建它，可以这样做：

http://jsfiddle.net/csdtesting/tap2xom9/

var category = ['Guitar', 'Bass', 'Amps'];
var platform_a = ['platform-a1', 'platform-a2', 'platform-a3'];
var platform_b = ['platform-b1', 'platform-b2', 'platform-b3'];
var platform_c = ['platform-c1', 'platform-c2', 'platform-c3'];
var FinalObject = {};
FinalObject[category[0]] = platform_a;
FinalObject[category[1]] = platform_b;
FinalObject[category[2]] = platform_c;
document.write(JSON.stringify(FinalObject));

最后

如果你想更动态，那么试试这个：

http://jsfiddle.net/csdtesting/kqwz72os/

var FinalObject = {};
var category = ['Guitar', 'Bass', 'Amps'];
var platforms = {
  platform_a: ['platform-a1', 'platform-a2', 'platform-a3'],
  platform_b: ['platform-b1', 'platform-b2', 'platform-b3'],
  platform_c: ['platform-c1', 'platform-c2', 'platform-c3']
};
for (var i = 0; i < category.length; i++) {
  FinalObject[category[i]] = platforms[Object.keys(platforms)[i]];
}
document.write(JSON.stringify(FinalObject));

希望这能有所帮助！

这里没有合理的快捷方式。你只需要手动操作：

var jsonString = JSON.stringify({
    "Guitar": platform_a,
    "Base": platform_b,
    "Amp": platform_c
});
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