Filtering JSON data

Question

I have a JSON file which contains data like the following:

{\"posts\": [ 
    { \"title\":\"1\", \"url\":\"n1.png\" }, 
    { \"title\":\"2\", \"url\":\"n2.p         


        

Answer 1

There is another solution to this: using jLinq.js (documentation), which has even more features. In this case, you can get the solution by using the following code:

var selectedPosts = jLinq.from(posts)
                         .betweenEquals("title",4,8)
                         .select();

Answer 2

try this

var q = new RegExp(req.query.q,'i');

posts = posts.filter(function(item){
    if(item.title.match(q) || item.url.match(q)){
        return item;
    }
});

Answer 3

I use Linq JS on my current project and it works really well for filtering data.

http://jslinq.codeplex.com/

var posts = [ 
    { "title":"1", "url":"n1.png" }, 
    { "title":"2", "url":"n2.png" }, 
    { "title":"3", "url":"n3.png" }, 
    { "title":"4", "url":"n4.png" }, 
    { "title":"5", "url":"n5.png" }, 
    { "title":"6", "url":"n6.png" }, 
    { "title":"7", "url":"n7.png" }, 
    { "title":"8", "url":"n8.png" }, 
    { "title":"9", "url":"n9.png" }, 
    { "title":"10", "url":"n10.png" }
];

var filteredPost = JSLINQ(posts)
                   .Where(function(item){ return item.title >= "textBox1Value" && item.title <= "textBox2Value"; });

Answer 4

Why not do this?

var json = JSON.parse('{"posts": [ 
{ "title":"1", "url":"n1.png" }, 
{ "title":"2", "url":"n2.png" }, 
{ "title":"3", "url":"n3.png" }, 
{ "title":"4", "url":"n4.png" }, 
{ "title":"5", "url":"n5.png" }, 
{ "title":"6", "url":"n6.png" }, 
{ "title":"7", "url":"n7.png" }, 
{ "title":"8", "url":"n8.png" }, 
{ "title":"9", "url":"n9.png" }, 
{ "title":"10", "url":"n10.png" }
]}');

var filteredJson = json.posts.filter(function (row) {
  if(row.title matches your criteria) {
    return true
  } else {
    return false;
  }
});

Yes, its an ES5 method but that can be shimmed quite nicely

Answer 5

Well i have this JSON array full of projects, each of project belong to a product:

[
 {
    "id": 1,
    "parentProduct": {
      "id": 12,
      "productName": "Test 123"
    },
    "phase": "Phase 4",
    "productNumber": "111223",
    "projectName": "Test JPEG Apple",
    "supplier1": "de",
  },
  {
   "id": 2,
   "parentProduct": {
     "id": 12,
     "productName": "Test from me"
   },
   "phase": "222",
   "productNumber": "11122",
   "projectName": "Test PNG",
   "supplier1": "222"
   }
]

I wanted to get only those with specific parent id, and i did it as below:

filterByProductId(projects, productId) : any[] {
    var filteredArray = new Array;
    for(var k in projects) {
      if(projects[k].parentProduct.id == productId) {
        filteredArray.push(projects[k]);
      }
    }
 return filteredArray;
}

Answer 6

First once you have all the json data, you need to traverse them. For that,

         **$.each(data, function (i, data) {
             if (data.title >= "textBox1Value" && item.title <= "textBox2Value")
             //then the data;
         });**

1. List item