Creating a Javascript Function That Iterates through JSON

Question

How do you access the value of a key:value pair in JSON? Right now, the function iterates through the json and provide keys but not the corresponding values. So for instance, if I wanted the site value for each task of each employee, how would I do that?

var s = {
    "schedule": {
        "employees": {
            "1000": {
                "task1": [
                    {
                        "task": "task1",
                        "site": "site1",
                        "from": "0900",
                        "to": "1000"
                    },
                    {
                        "task": "task2",
                        "site": "site2",
                        "from": "0900",
                        "to": "1000"
                    }
                ]
            },
            "2000": {
                "task2": [
                    {
                        "task": "task3",
                        "site": "site3",
                        "from": "0900",
                        "to": "1000"
                    },
                    {
                        "task": "task4",
                        "site": "site4",
                        "from": "0900",
                        "to": "1000"
                    }
                ]
            }
        }
    }
}

for (var i in s["schedule"]["employees"]) {
    // this gives me the object, I would like the employee number (eg:1000)
    console.log([i]);
    for (var j in s["schedule"]["employees"][i]["tasks"]) {
        //how do I print the value for the "site" key?
        console.log([j]);       
    }
}

@tokyovariable: He did, needs scrolling though.

Amadan
– Amadan

2014-11-28 01:10:00 +00:00
Commented Nov 28, 2014 at 1:10 — Amadan
– Amadan, Commented Nov 28, 2014 at 1:10

Amadan · Accepted Answer · 2014-11-28 01:02:23Z

2

console.log(i); // employee number

console.log(s.schedule.employees[i].tasks[j].site); // task site

answered Nov 28, 2014 at 1:02

Amadan

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6 Comments

Roco CTZ Over a year ago

Hi, employees[i] is not valid as employees is not an array. employees is an object and "1000", "2000" are properties of that object.

Patrick Evans Over a year ago

@RocoCTZ, no its not an array but you can access its properties by using array syntax. And since you cannot do employees.1000 etc you have to do it with the array syntax

Amadan Over a year ago

@RocoCTZ: ({"1000": "still works"})["1000"] == "still works"

KishB87 Over a year ago

@PatrickEvans So I can see that they're not arrays. But why is is that you cannot do employees.1000 etc and why do you use array syntax if it's not an array?

Amadan Over a year ago

It's not really "array syntax". It is still object property access. a.b is always identical to a["b"]; but you can't always do the reverse - because some would be ungrammatical (like, e.g. your employees.1000 example), or because the property name is not a constant (i.e. employee.i is wrong because we want the property of employee whose name is not i, but in i). Arrays in JS are just somewhat magic kinds of objects which are optimised to access integral keys, and have a magic property length which is autoadjusted whenever you assign to an integral key.

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