Conditional query on JavaScript object to return specific name with JQuery

Question

I have a JavaScript object that I use to store data for one user that can look like this:

output = {
  id: "444",
  trial: [1, 2, 3, 4, 5, 6, 7, 8, 9],
  points: [0, 100, 50, 50, 0, 0, 0, 100, 50]
  }

What I want is to query/filter this object, for example, to extract all trial numbers output.trial where output.points > 50.

I have found this in another post but it is not quite what I am looking for (it returns an empty array).

var result = $.grep(output, function(v) {
    return v.points > 50;
});

In other words, I want to give a number of conditions and receive the instances of a name of my object where this is true (preferable as array). In this example:

result_after_query = [2, 8]

How can I achieve this?

Diego Romero · Accepted Answer · 2015-08-15 18:25:34Z

5

You can use Array.prototype.filter method:

var output = {
  id: "444",
  trial: [1, 2, 3, 4, 5, 6, 7, 8, 9],
  points: [0, 100, 50, 50, 0, 0, 0, 100, 50]
};

var result = output.trial.filter(function(el, i) {
  return output.points[i] > 50;
});

document.write(JSON.stringify(result));

edited Aug 15, 2015 at 18:25

Diego Romero

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answered Aug 15, 2015 at 18:20

dfsq

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Comments

dom · Accepted Answer · 2015-08-15 18:24:37Z

1

use below code, it will surely help u

var output = {id: "444",trial: [1, 2, 3, 4, 5, 6, 7, 8, 9],points: [0, 100, 50, 50, 0, 0, 0, 100, 50]};

var arr = [];

$.each(output.points, function(index, value){
    if(value > 50)
      arr.push(index +1);
});
alert(arr);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>

answered Aug 15, 2015 at 18:24

dom

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