select specific items in json array using javascript [duplicate]

Question

I have result.json that looks like this :

[
 {
  "id":"1",
  "label":"2017-03-30",
  "value":"1675000"
 },
 {
  "id":"2",
  "label":"2017-04-01",
  "value":"1440000"
 },
 {
  "id":"2",
  "label":"2017-04-02",
  "value":"830000"
 },
]

How can I get the specific items in json array .
for example I wanted to make an output for each "value" if

id=2 and label=2017-04-01

Jonas Wilms · Accepted Answer · 2017-05-07 12:38:06Z

7

console.log(arr.filter(item => {
    return item.id === `2` && item.label === `2017-04-01`;
}));

recommended Improvement:

var arr=[{
   "id":"1",
   "label":"2017-03-30",
   "value":"1675000"
 },
 {
   "id":"2",
   "label":"2017-04-01",
   "value":"1440000"
 },
 {
   "id":"2",
   "label":"2017-04-02",
   "value":"830000"
  },
];
console.log(...arr.filter(item => item.id === `2` && item.label === `2017-04-01`));

If you just want the values:

console.log(...arr.filter(item => item.id === `2` && item.label === `2017-04-01`).map(e=>e.value));

http://jsbin.com/fimulelebi/edit?console

edited May 7, 2017 at 12:38

Jonas Wilms

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answered May 7, 2017 at 12:33

Alex

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4 Comments

Oen44 Over a year ago

That won't return value but entire object.

Jonas Wilms Over a year ago

you could leave away the { return }

Alex Over a year ago

arr.filter(item => item.id === 2 && item.label === 2017-04-01)[0]

Jonas Wilms Over a year ago

@Alex ive just edited your code, if you think its better you can take it over, if not you can dump it...

Oen44 · Accepted Answer · 2017-05-07 12:49:03Z

1

Use forEach method. Easy to use and navigate through items.

var json = [
  {
    "id": "1",
    "label": "2017-03-30",
    "value": "1675000"
  },
  {
    "id": "2",
    "label": "2017-04-01",
    "value": "1440000"
  },
  {
    "id": "2",
    "label": "2017-04-02",
    "value": "830000"
  },
];

json.forEach(item => {
  if(item.id == "2" && item.label == "2017-04-01") {
    console.log(item.value);
  }
})

edited May 7, 2017 at 12:49

user2949702

answered May 7, 2017 at 12:33

Oen44

3,2461 gold badge24 silver badges32 bronze badges

2 Comments

wumBo_ Over a year ago

how if the json is on external files (result.json )?how do we call it on js?

Oen44 Over a year ago

Using Ajax. But that's question not related with what you asked here, so you should write new one. Before you do that, read about Ajax.

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