Is there a way to select all JSON objects containing a specific value?

Question

Let's say you have JSON like the following:

[{
    "Rarity": "Common",
    "EffectOne": "+4 ACC",
    "EffectTwo": "-1 SPD",
    "EffectThree": "",
  },
{
    "Rarity": "Common",
    "EffectOne": "+4 ACC",
    "EffectTwo": "-1 SPD",
    "EffectThree": "",
  },
{
    "Rarity": "Rare",
    "EffectOne": "+4 ACC",
    "EffectTwo": "-1 SPD",
    "EffectThree": "",
  }]

How can you target the objects that have a shared value for one of the Properties, such as "Rarity": "Common".

Can you do (for the sake of this example, let's say this JSON is just named data): data.rarity.common? or would it be data.rarity("Common"). The reason I ask is I actually can't seem to find this info anywhere in JSON jquery documentation and I would like to populate data in different places based on specific values.

You have some extra commas in your JSON. You're likely not finding the information you need in jQuery's documentation because this primarily done without the need for libraries or frameworks - objects, arrays, properties, etc, are all fundamentals of plain JS. If you wanted to narrow down your array to only objects that have "Rarity": "Common", you have a few options, primarily data = data.filter(x => x.Rarity == "Common"); An Example — Tyler Roper
– Tyler Roper, Commented Jul 18, 2017 at 18:12
Boom, thanks so much! I couldn't seem to find this info. Much Appreciated! — dbrree
– dbrree, Commented Jul 18, 2017 at 18:14
Not a problem. Added an example to demonstrate. Also, just to be clear, the reason you cannot do data. is because data is an array. It does not have properties, but rather indexes. The filter function I've provided simply iterates through each item (as x), and evaluates the condition supplied (x.Rarity == "Common"). If the result is false, the item is removed from the array. — Tyler Roper
– Tyler Roper, Commented Jul 18, 2017 at 18:15

hallleron · Accepted Answer · 2017-07-18 18:52:08Z

3

There you go with plain JavaScript. The variable common_value is set to Common as a filter for the rarity. Is this what you are looking for?

var json = [{
    "Rarity": "Common",
    "EffectOne": "+4 ACC",
    "EffectTwo": "-1 SPD",
    "EffectThree": "",
  },
{
    "Rarity": "Common",
    "EffectOne": "+4 ACC",
    "EffectTwo": "-1 SPD",
    "EffectThree": "",
  },
{
    "Rarity": "Rare",
    "EffectOne": "+4 ACC",
    "EffectTwo": "-1 SPD",
    "EffectThree": "",
  }];

var common_value = "Common";
var results = [];

for(var i = 0; i < json.length; i++){
	if(json[i].Rarity === common_value){
  	results.push(json[i]);
  }
}

console.log(results);

answered Jul 18, 2017 at 18:52

hallleron

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1 Comment

hallleron Over a year ago

Your're welcome. Remember you can change the ".Rarity" to any key you like for controlling the filter :-)

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