this

// Playground - noun: a place where people can play

import UIKit
import Foundation

var textArray:[String?] = ["first", nil, "third", nil]
var isBigThumb:[Bool] = [false, false, false, true]

class testClass: NSObject {
  var text:String?
  var isBigThumb:Bool
  
  init(text:String?, isBigThumb:Bool) {
    self.text = text
    self.isBigThumb = isBigThumb
  }
  
  func displayProperty() {
    println("\(self.text) + \(self.isBigThumb)")
  }
}

var classArray:[testClass] = []

for i in 0...3 {
  let t = testClass(text: textArray[i], isBigThumb: isBigThumb[i])
  t.displayProperty()
  classArray.append(t)
}

let firstPredicate = NSPredicate(format: "text = 'first'")
let bigPredicate = NSPredicate(format: "isBigThumb = FALSE")

let first = (classArray as NSArray).filteredArrayUsingPredicate(firstPredicate!)
let big = (classArray as NSArray).filteredArrayUsingPredicate(bigPredicate!)

let bigSwift = classArray.filter { (x) -> Bool in
  x.isBigThumb == true
}