How to filter a nested SwiftyJSON array

Question

I have a SwiftyJSON array that is nested several levels and I need to filter the array based on a value in the lowest level. Below is an example of an array. I need to filter it on Active == true. What is the most efficient way to accomplish this?

var colors = JSON([
"Apple" : [
        "Yellow" : [
            "Active" : true,
            "Working" : true,
            "Value" : 0
        ],
        "Red" : [
            "Active" : false,
            "Working" : true,
            "Value" : 0
        ]
],
"Banana" : [
        "Blue" : [
            "Active" : false,
            "Working" : true,
            "Value" : 0
        ],
        "Green" : [
            "Active" : true,
            "Working" : true,
            "Value" : 0
        ]
]
])

Desired output:

"Apple" : [
        "Yellow" : [
            "Active" : true,
            "Working" : true,
            "Value" : 0
        ]
],
"Banana" : [
        "Green" : [
            "Active" : true,
            "Working" : true,
            "Value" : 0
        ]
]

The array is a dictionary.

vadian
– vadian

2016-10-11 20:23:38 +00:00
Commented Oct 11, 2016 at 20:23 — vadian
– vadian, Commented Oct 11, 2016 at 20:23
@MikeDeluca Check my answer once.

Rajan Maheshwari
– Rajan Maheshwari

2016-10-11 22:00:14 +00:00
Commented Oct 11, 2016 at 22:00 — Rajan Maheshwari
– Rajan Maheshwari, Commented Oct 11, 2016 at 22:00

Rajan Maheshwari · Accepted Answer · 2016-10-11 21:57:47Z

1

Check this out

var filteredArray = [JSON]()

for item in colors {
    for subItem in item.1 {
        if subItem.1["Active"].boolValue {
           filteredArray.append(JSON([item.0:JSON([subItem.0:subItem.1])]))
        }
    }
}

print(filteredArray)

Output is the array of Dictionaries of filtered sub dictionaries with Active true:

[{
  "Apple" : {
    "Yellow" : {
      "Working" : true,
      "Value" : 0,
      "Active" : true
    }
  }
}, {
  "Banana" : {
    "Green" : {
      "Working" : true,
      "Value" : 0,
      "Active" : true
    }
  }
}]

edited Oct 11, 2016 at 21:57

answered Oct 11, 2016 at 21:51

Rajan Maheshwari

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Comments

breno · Accepted Answer · 2016-10-11 20:34:43Z

0

you can create a loop that will read all colors and within this loop to create one that will read the other items in the second array. Within the second is you check if the item is valid or not and save it in another array

let activeItems = []

for item in colors {
   for i in item as NSDictionary {
      if i.objectForKey("Active") == true {
         activeItems.addObject(i)
      }
   }
}

answered Oct 11, 2016 at 20:34

breno

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3 Comments

Mike Deluca Over a year ago

This doesn't work because the array is JSON, giving error cannot convert value of type (String, JSON) to type NSDictionary

vadian Over a year ago

It is not an array.

Rajan Maheshwari Over a year ago

@MikeDeluca No need to convert it to NSDictionary, it can be solved by simple [JSON] array of SwiftyJSON. Check my answer

Alex · Accepted Answer · 2016-10-11 21:32:16Z

0

        var result = [String:[String:JSON]]()
        for (key, json) in colors.dictionaryValue {
            let filtered = json.dictionaryValue.filter{$0.1["Active"].boolValue}
            guard filtered.count > 0 else { continue }

            var subDic = [String:JSON]()
            filtered.forEach{subDic[$0.0] = $0.1}
            result[key] = subDic
        }
        print(result)

answered Oct 11, 2016 at 21:32

Alex

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