Question 109812 in Json Question posted in
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How do i only get objects from the JSON and not the strings?

I have a JSON, and I want to loop through it but when i loop through it, due to the strings present with it, the loop is failing. How do i just loop through the objects in the JSON ?

I just want to iterate through the objects within that JSON.

  • I tried if(json.length!=3) but it fails when it hits the object because i think it cannot find a length for the object
  • I also tried json.hasOwnProperty("field_id") which is also failing when i hit the string "and"
  • I also tried if(json.length=undefined) which also fails because the length itself goes into undefined state

Here’s my JSON:

[
    {
        "field_id": 122,
        "operator_id": "1",
        "where_flag": true
    "and",
    {
        "field_id": 128,
        "operator_id": "0",
        "where_flag": true
    },
    "and",
    {
        "field_id": 148,
        "operator_id": "1",
        "where_flag": true
    }
]
Tags:

2

Answers


  1. 0

    I’d recommend filtering the items first and then, looping over the objects:

    function isObject(value) {
  return typeof value === "object" && value !== null
}

array.filter(item => isObject(item)).forEach(...)

    or just squeezing them in one loop (which I don’t usually recommend):

    array.forEach(item => {
  if(!isObject(item)) return;

  ...
})
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  2. 0

    maybe this will work,

    let array = [
    {
        "field_id": 122,
        "operator_id": "1",
        "where_flag": true
    },
    "and",
    {
        "field_id": 128,
        "operator_id": "0",
        "where_flag": true
    },
    "and",
    {
        "field_id": 148,
        "operator_id": "1",
        "where_flag": true
    }
]

array.forEach((elem)=>{
    if(typeof(elem)=="object"){
        console.log(elem)
    }
})
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