JSON/Javascript object definition

Question

Trying to identify the type of array, I have an multidimensional JSON array that i pull from a website, but its not using keypairs i am farmiliar with. The structure is as follows. I have only included 1 array item to show what it's doing.

"o": {
     "ah": ["id1", "12", "id2", "32", "id4", "4", "id5, "6"]
},

My searches on both JavaScript and JSON objects and strings always use a semi-colon : to define the key and the value.

In the end I just want to loop through the multiple items and print them out.

To provide more clarification about the array structure:

{
    "outer": {
            "item1":[ {
                "c": {
                    "k": 26862, "n": "theName"
                },
                "o": {
                    "ah": ["id1", "0", "id2", "0", "id3", "0.98", "id4", "0.94", "id5", "5", "id6", "-0/0.5"], 
                    "ou": ["id7", "3.5", "id8", "3.5", "id9", "1.53", "id10", "0.55", "id11", "3.4", "id12"],
                    "1x2": ["id13", "1.20", "id14", "25.00", "id15", "4.80"]
                    },
                    "egn":""
                }
                ]
            },
            {
            "item1":[ {
                "c": {
                    "k": 26862, "n": "theName"
                },
                "o": {
                    "ah": ["bd1", "0", "bd2", "0", "bd3", "0.98", "bd4", "0.94", "bd5", "0.5", "bd6", "-0.5"], 
                "ou": ["bd7", "3.5", "bd8", "3.5", "bd9", "1.53", "bd10", "0.55", "bd11", "3.4", "bd12"],
                "1x2": ["bd13", "1.20", "bd14", "25.00", "bd15", "4.80"]
                },
                "egn":""
                }
                ]
    } 
}

If I wanted to bind an ID to a specific field e.g. and it display the value of ID 1 in the array structure how would I do it without a keypair value, also if the array ID is not standardized so you can't loop through like var = "id"+ i foreach element?

This is a key/value pair: the first key ("o") has an object as a value. The second key ("ah"), inside that object, has an array as a value. — Gerardo Furtado
– Gerardo Furtado, Commented Aug 29, 2016 at 2:10
What do you mean by multidimensional? Are there multiple arrays? Can you show a more complete structure with three or more? — qxz
– qxz, Commented Aug 29, 2016 at 2:17
Please educate yourself on what "JSON" is. It's a string representation used for exchanging data, such as between a server and a client. What you are showing has nothing to do with JSON. It's just a JavaScript object. Anyway, if your objective is to "loop through" the object, why does your title say "object definition"? — user663031
– user663031, Commented Aug 29, 2016 at 2:52

guest271314 · Accepted Answer · 2016-08-29 02:27:42Z

5

o is an object, ah is an array which is a property of o object. You use JSON.parse() to convert JSON string to javascript object, then iterate over o.ah using Array.prototype.forEach()

// or however you obtain the JSON string
var obj = JSON.parse(jsonStr); 
obj.o.ah.forEach(function(value) {
  console.log(value);
});

edited Aug 29, 2016 at 2:27

answered Aug 29, 2016 at 2:11

guest271314

1

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7 Comments

qxz Over a year ago

Wait, why the JSON.parse? o.ah is an array, not a JSON string.

guest271314 Over a year ago

@qxz "i have an multidimentional JSON array " If JSON.parse() is not necessary, o.ah.forEach(function) can be used

qxz Over a year ago

According to the JSON he posted, o.ah is an array... so the JSON.parse will cause an error.

guest271314 Over a year ago

@qxz "According to the JSON he posted, o.ah is an array." Yes, though if o is JSON, o is a string, not a javascript object?

qxz Over a year ago

Then you would have to do JSON.parse(o).ah.forEach. If o is a string, o.ah is undefined, because strings don't have an ah property

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