所以我有这个JSON对象。我们称之为var dataFetched
var dataFetched = {
"status": "ok",
"count": 4,
"count_total": 4,
"pages": 1,
"posts": [
{
"id": 57,
"type": "keyword",
"slug": "crime-scene-investigation-csi",
"url": "http://keyjargon.com/keyword/crime-scene-investigation-csi/",
"status": "publish",
"title": "Crime Scene Investigation (CSI)",
"title_plain": "Crime Scene Investigation (CSI)",
"content": "",
"excerpt": "",
"date": "2015-11-07 05:01:51",
"modified": "2015-11-07 05:01:51",
"categories": [
{
"id": 8,
"slug": "law",
"title": "Law",
"description": "",
"parent": 0,
"post_count": 1
}
],
"tags": [
],
"author": {
"id": 1,
"slug": "admin",
"name": "admin",
"first_name": "",
"last_name": "",
"nickname": "admin",
"url": "",
"description": ""
},
"comments": [
],
"attachments": [
],
"comment_count": 0,
"comment_status": "closed",
"custom_fields": {
}
},
{
"id": 50,
"type": "keyword",
"slug": "fx",
"url": "http://keyjargon.com/keyword/fx/",
"status": "publish",
"title": "FX",
"title_plain": "FX",
"content": "",
"excerpt": "",
"date": "2015-11-05 10:07:17",
"modified": "2015-11-05 10:22:10",
"categories": [
{
"id": 3,
"slug": "business",
"title": "Business",
"description": "",
"parent": 0,
"post_count": 2
}
],
"tags": [
],
"author": {
"id": 1,
"slug": "admin",
"name": "admin",
"first_name": "",
"last_name": "",
"nickname": "admin",
"url": "",
"description": ""
},
"comments": [
],
"attachments": [
],
"comment_count": 0,
"comment_status": "closed",
"custom_fields": {
}
},
{
"id": 48,
"type": "keyword",
"slug": "common-core",
"url": "http://keyjargon.com/keyword/common-core/",
"status": "publish",
"title": "Common CORE",
"title_plain": "Common CORE",
"content": "",
"excerpt": "",
"date": "2015-11-05 10:06:40",
"modified": "2015-11-07 04:58:06",
"categories": [
{
"id": 2,
"slug": "technology",
"title": "Technology",
"description": "",
"parent": 0,
"post_count": 3
}
],
"tags": [
],
"author": {
"id": 1,
"slug": "admin",
"name": "admin",
"first_name": "",
"last_name": "",
"nickname": "admin",
"url": "",
"description": ""
},
"comments": [
],
"attachments": [
],
"comment_count": 0,
"comment_status": "closed",
"custom_fields": {
}
},
{
"id": 46,
"type": "keyword",
"slug": "api",
"url": "http://keyjargon.com/keyword/api/",
"status": "publish",
"title": "API",
"title_plain": "API",
"content": "",
"excerpt": "",
"date": "2015-11-05 10:06:19",
"modified": "2015-11-05 10:21:47",
"categories": [
{
"id": 2,
"slug": "technology",
"title": "Technology",
"description": "",
"parent": 0,
"post_count": 3
}
],
"tags": [
],
"author": {
"id": 1,
"slug": "admin",
"name": "admin",
"first_name": "",
"last_name": "",
"nickname": "admin",
"url": "",
"description": ""
},
"comments": [
],
"attachments": [
],
"comment_count": 0,
"comment_status": "closed",
"custom_fields": {
}
}
]
}
我想重新安排此结果以链接类别标题：
dataFetched.posts[i].categories[0].title
到帖子标题：
dataFetched.post[i].title
以便每个类别显示与其相关的所有帖子标题。我希望我的对象（无论是多维数组还是其他对象）能够检索与该类别相关的所有帖子标题。
也许是这样的：
[Category1: {Post_titleA, PostTitleB, PostTitleC}, Category2: {PostTileF, PostTileX}, etc ] where each category can retrieve all its posts.( The format does not matter as long the Object with Category title X can retrieve all posts titles that belong to it ).
如何在Javascript中执行此操作？结果变量不是静态的，但其格式与此处发布的格式相同。
这是我到目前为止所尝试的。
// Function to sort unique values of an array
function sort_unique(arr) {
arr = arr.sort(function (a, b) { return a*1 - b*1; });
var ret = [arr[0]];
for (var i = 1; i < arr.length; i++) { // start loop at 1 as element 0 can never be a duplicate
if (arr[i-1] !== arr[i]) {
ret.push(arr[i]);
}
}
return ret;
}
//Define two arrays to be used for categories and Keywords
var keywords = [];
var industries = [];
//Fill up the categories(Industries) array and the keywords one
for ( var i = 0, iLen = dataFetched.count; i < iLen; i++) {
keywords[i] = dataFetched.posts[i].title;
industries[i] = dataFetched.posts[i].categories[0].title;
}
// Sort and eliminate duplication of category and keyword names
keywords = sort_unique(keywords);
industries = sort_unique(industries);
// Now time for trouble: Define a multi-dimmensional array that links each category/industry to its keywords **This is where I AM STUCK**
ind = new Array;
for(i=0; i<industries.length;i++){
ind[i] = new Array;
}
for(i=0;i<dataFetched.count;i++){
ind[i][0]= dataFetched.posts[i].categories[0].title;
for(j=0;j<dataFetched.count;j++){
var count = ind[i].length;
if(ind[i][0] == dataFetched.posts[j].categories[0].title){
ind[i][count] = dataFetched.posts[j].title;
}
}
}
答案 0 :(得分：1)
您展示的输出示例是错误的，在JS中没有像
这样的对象[Category1: {Post_titleA, PostTitleB, PostTitleC}, Category2: {PostTileF, PostTileX}, etc ]
你能得到的最类似的东西是像这样的JSON对象：
{
"Category1" : ["Post_titleA", "PostTitleB", "PostTitleC"],
"Category2" : ["PostTileF", "PostTileX"],
//etc..
}
为了实现这一目标，您可以使用以下功能：
function getTitlesByCategory (json) {
var result = {}
json.posts.map(function (post) {
post.categories.map(function (category) {
result[category.title] = result[category.title] || [];
result[category.title].push(post.title);
});
});
return result;
}
答案 1 :(得分：1)
可以使用类别创建对象。因此，所有条目都可以按类别名称访问，您无需将它们排序为具有唯一标题：
var posts = dataFetched.posts;
var cat = {};
posts.forEach(
function(p) {
p.categories.forEach(
function(c) {
if (!cat[c.title])
cat[c.title] = [];
cat[c.title].push(p.title);
});
});
console.log(cat);
您的示例的输出：
Object {Law: Array[1], Business: Array[1], Technology: Array[2]}
每个类别标题都是此对象中的一个键，帖子数组是这些键的值。