Swift / Populate UITableView with Array.count of elements matching certain condition

Question

Currently I'm populating my UITableView by:

var eventDates: [NSMutableDictionary] = []

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

      return eventDates.count
}

Every eventDate within eventDates has a valueForKey("monthsYear") .

Hardcoded I want now eventDates.count only return the eventDates with the valueForKey("monthsYear") == "September 2016" .

In other words, to explain it one more time:

eventDates.count = 10. But only 5 of them match the condition valueForKey("monthsYear") == "September 2016" .

How do I get only those 5 elements to populate the UITableView (with only 5 rows).

In theory something like this:

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

    let returnValue = 0
    for date in eventDates where date.valueForKey("monthsYear")  == "September 2016" {
           returnValue++
    }
    return returnValue
}

Help is very appreciated.

Answer 1

So what you need to do is a simple Filter

let sepDates = eventDates.filter() { $0.valueForKey("monthYear") == "September 2016" }
return sepDates.count

some not answer related stuff stuff

One Advice, try to use models to avoid using valueForKey, so you array would look like

var eventDates: [EventDate] = []

good luck and have fun ;)