如何将JS对象转换为数组 [英] How to convert JS Object to Array

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本文介绍了如何将JS对象转换为数组的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我需要转换一个散列图

  {
fruit:[mango,orange ],
veg:[carrot]
}

  [
{type:fruit,name:[mango,orange ]},
{type:veg,name:[carrot]}
]

我该怎么做?

解决方案

你可以这样做(在工作片段中):

var input = {fruit:[mango,orange],veg:[ carrot]} var output = [],item; for(var type in input){item = {}; item.type = type; item.name = input [type]; output.push(item);} //显示resultdocument.write(JSON.stringify(输出));






或者,如果您或其他人一直在使用可枚举属性扩展 Object (我个人认为这是个不好的做法),那么你可以用它来保护它:

var input = {fruit [mango,orange],veg:[carrot]} var output = [],item; for(var type in input){if(input.hasOwnProperty(type)){item = {} ; item.type = type; item.name = input [type]; output.push(项目); $} $ // $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ b


而且,使用更现代的功能: jsdata-hide =false>

  var input = {fruit :[mango,orange],veg:[carrot]}; var output = Object.keys(input).map(function(key){return {type:key,name:input [ key)};}); //显示resultdocument.write(JSON.stringify(output));  


I need to convert a hash map

{ 
    "fruit" : ["mango","orange"],
    "veg"   : ["carrot"]
} 

to

[ 
  { "type" : "fruit" , "name" : ["mango","orange"] } ,
  { "type" : "veg" ,   "name" : ["carrot"] } 
]

how do I do that??

解决方案

You can do it like this (in a working snippet):

var input = { 
    "fruit" : ["mango","orange"],
    "veg"   : ["carrot"]
} 

var output = [], item;

for (var type in input) {
    item = {};
    item.type = type;
    item.name = input[type];
    output.push(item);
}

// display result
document.write(JSON.stringify(output));


Or, if you or someone else has been extending the Object prototype with enumerable properties (which I think is a bad practice personally), then you could use this to protect from that:

var input = { 
    "fruit" : ["mango","orange"],
    "veg"   : ["carrot"]
} 

var output = [], item;

for (var type in input) {
    if (input.hasOwnProperty(type)) {
        item = {};
        item.type = type;
        item.name = input[type];
        output.push(item);
    }
}

// display result
document.write(JSON.stringify(output));


And, using some more modern functionality:

var input = { 
    "fruit" : ["mango","orange"],
    "veg"   : ["carrot"]
};

var output = Object.keys(input).map(function(key) {
   return {type: key, name: input[key]};
});

// display the result
document.write(JSON.stringify(output));

这篇关于如何将JS对象转换为数组的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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