Search JSON values in array using underscore

Question

I have the file default.json:

{
    "IPs": {
        "ip1": "192.168.0.1",
        "ip2": "192.168.0.2",
        "ip3": "192.168.0.3"
    }
}

My code:

var _      = require('underscore'),
    config = require('default.json')

var array  = ['192.168.0.1', '192.168.0.2']

//search array in IPs

How can I search values of array in IPs (ip1, ip2, ip3) and whenever it's true, call a function? Preferably using an underscore function.

Do you mean "ip1": "192.168.0.1" instead of "ip1: 192.168.0.1"? (note the quotes). — Felix Kling
– Felix Kling, Commented Apr 5, 2016 at 16:28
You should also use a comma , after each line of the JSON file. — simeg
– simeg, Commented Apr 5, 2016 at 16:32
default.json is invalid JSON. You're defining an object using {} but you're not using keys and values, unless you remove the quotation marks around the whole line and just place them on the ip addresses. — Rob Brander
– Rob Brander, Commented Apr 5, 2016 at 16:34
Your default.json is still invalid unless you remove the "IPs": part, or add surrounding {}. — user663031
– user663031, Commented Apr 5, 2016 at 16:42

Rob Brander · Accepted Answer · 2016-04-05 16:40:08Z

1

Assuming you fix default.json to be like this:

"IPs": {
    ip1: "192.168.0.1",
    ip2: "192.168.0.2",
    ip3: "192.168.0.3"
}

You can then search for the IPs matching

var foundIPs = Object.keys(config.IPs).filter(function(name) {
  // name will be something like 'ip1', 'ip2', or 'ip3'
  var currIP = config.IPs[name]; // eg. currIP = "192.168.0.1"
  var inArray = array.indexOf(currIP) > -1;
  return inArray;
});
var foundIP = foundIPs.length > 0;

answered Apr 5, 2016 at 16:40

Rob Brander

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Danilo · Accepted Answer · 2016-04-05 20:30:48Z

0

I used this solution (with underscore):

File default.json

    {
        "IPs": {
            "ip1": "192.168.0.1",
            "ip2": "192.168.0.2",
            "ip3": "192.168.0.3"
        }
    }

The code:

var _      = require('underscore'),
    config = require('default.json')

var array = ['192.168.0.1', '192.168.0.2']
var IPs   = config.IPs

_.each(IPs, function(e, k){
    //if find IPs in array
    if(array.indexOf(e) > -1)
        //do something
    else
        //do something
})

answered Apr 5, 2016 at 20:30

Danilo

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