Added NSPredicate Playground

.gitignore

@@ -1 +1,2 @@
-.DS_Store
+.DS_Store
+NSPredicate/NSPredicate.playground/playground.xcworkspace/xcuserdata/dfreniche.xcuserdatad

NSPredicate/NSPredicate.playground/Pages/Composition.xcplaygroundpage/Contents.swift

@@ -0,0 +1,66 @@
+//: [Previous](@previous)
+/*:
+
+# Basic Compound Predicates
+*/
+/*:- `AND, &&: Logical AND`
+- `OR, ||: Logical OR`
+- `NOT, !: Logical NOT`
+
+*/
+import Foundation
+
+class City: NSObject {
+    let name: String
+
+    init(name: String) {
+        self.name = name
+    }
+
+    // description lets you pretty print this class' instances in the sidebar
+    override var description: String {
+        return self.name
+    }
+}
+
+class Person: NSObject {    // Must inherit from NSObject
+    let name: String
+    let age: Int
+    let city: City?
+
+    init(name: String, age: Int, city: City) {
+        self.name = name
+        self.age = age
+        self.city = city
+    }
+
+    // description lets you pretty print this class' instances in the sidebar
+    override var description: String {
+        if let city = self.city {
+            return self.name + " - \(self.age) years old - \(city)"
+        }
+        return self.name + " - \(self.age) years old"
+    }
+}
+
+let sf = City(name: "San Francisco")
+let nyc = City(name: "New York")
+
+let groucho = Person(name: "Groucho", age: 50, city: nyc)
+let chicco = Person(name: "Chicco", age: 61, city: nyc)
+let harpo = Person(name: "Harpo", age: 45, city: sf)
+let zeppo = Person(name: "Zeppo", age: 61, city: sf)
+
+let people: NSArray = [groucho, chicco, harpo, zeppo]
+
+/*:
+
+All people with age 61 AND who lives in NYC 
+
+*/
+
+let pred = NSPredicate(format: "%K = %@ AND age = %d", "city.name", "New York", 61)
+people.filteredArrayUsingPredicate(pred)
+
+
+//: [Next](@next)

NSPredicate/NSPredicate.playground/Pages/Composition.xcplaygroundpage/timeline.xctimeline

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+   </TimelineItems>
+</Timeline>

NSPredicate/NSPredicate.playground/Pages/Contains.xcplaygroundpage/Contents.swift

@@ -0,0 +1,38 @@
+//: [Previous](@previous)
+
+import Foundation
+
+class Province: NSObject {    // Must inherit from NSObject
+    let name: String
+
+    init(name: String) {
+        self.name = name
+    }
+
+    // description lets you pretty print this class' instances in the sidebar
+    override var description: String {
+        return self.name
+    }
+}
+
+let cadiz = Province(name: "Cádiz")
+let malaga = Province(name: "Málaga")
+let logrono = Province(name: "Logroño")
+let madrid = Province(name: "Madrid")
+let lugo = Province(name: "lugo")
+
+let provinces: NSArray = [cadiz, malaga, logrono, madrid, lugo]
+
+
+/*:
+
+Contains give you even more power!
+
+*/
+
+
+let provincesStartingWithM = NSPredicate(format: "name contains [cd] 'a'")
+
+provinces.filteredArrayUsingPredicate(provincesStartingWithM)
+
+//: [Next](@next)

NSPredicate/NSPredicate.playground/Pages/Contains.xcplaygroundpage/timeline.xctimeline

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "#CharacterRangeLen=61&amp;CharacterRangeLoc=694&amp;EndingColumnNumber=62&amp;EndingLineNumber=34&amp;StartingColumnNumber=1&amp;StartingLineNumber=34&amp;Timestamp=459152880.070413"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "#CharacterRangeLen=61&amp;CharacterRangeLoc=650&amp;EndingColumnNumber=62&amp;EndingLineNumber=29&amp;StartingColumnNumber=1&amp;StartingLineNumber=29&amp;Timestamp=459153925.64804"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "#CharacterRangeLen=9&amp;CharacterRangeLoc=510&amp;EndingColumnNumber=14&amp;EndingLineNumber=22&amp;StartingColumnNumber=5&amp;StartingLineNumber=22&amp;Timestamp=459153925.64804"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
+      </LoggerValueHistoryTimelineItem>
+   </TimelineItems>
+</Timeline>

NSPredicate/NSPredicate.playground/Pages/HelloWorld.xcplaygroundpage/Contents.swift

@@ -0,0 +1,91 @@
+//: [Previous](@previous)
+/*:
+
+## NSPredicate Hello World
+
+Given the Person class:
+*/
+import Foundation
+
+class Person: NSObject {    // Must inherit from NSObject or NSPredicate will fail at runtime
+    let name: String
+    let age: Int 
+
+    init(name: String, age: Int) {
+        self.name = name
+        self.age = age
+    }
+
+    // description lets you pretty print this class' instances in the sidebar
+    override var description: String {
+        return self.name + " - \(self.age) years old"
+    }
+}
+
+/*:
+
+and a bunch of People
+
+*/
+
+let groucho = Person(name: "Groucho", age: 50)
+let chicco  = Person(name: "Chicco", age: 61)
+let harpo   = Person(name: "Harpo", age: 45)
+let zeppo   = Person(name: "Zeppo", age: 61)
+
+let people: NSArray = [groucho, chicco, harpo, zeppo]
+// using a NSArray here because predicates work with them, not with regular Swift Arrays
+
+/*:
+
+we can get __all people of age == 61__ with a simple predicate
+
+*/
+
+let allAge61 = NSPredicate(format: "age = 61")
+
+people.filteredArrayUsingPredicate(allAge61)
+
+/*:
+
+we can also __filter by name__
+
+*/
+
+
+let namesPredicate = NSPredicate(format: "name = 'Harpo'")
+
+people.filteredArrayUsingPredicate(namesPredicate)
+
+
+/*:
+
+💻 __Your turn__: try to filter all people aged 50 years old, then everyone called _Zeppo_
+
+*/
+
+
+
+/*:
+
+💻 __SOME DESTRUCTIVE FUN__: remove the NSObject parent class from Person and see what happens (__save before__)
+
+*/
+
+
+/*:
+
+💻 More destructive fun__: change the NSArray from people, to create a Swift Array and see what happens
+*/
+
+
+
+/*:
+
+💻 You can use `=` or `==` in comparisons. Try it
+
+*/
+
+
+
+//: [Next](@next)

NSPredicate/NSPredicate.playground/Pages/HelloWorld.xcplaygroundpage/timeline.xctimeline

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/dfreniche/BTSync/Trabajo/Formacio%CC%81n/iOS/Curso%20iOS%20-%20Intermedio/Keynote/NSPredicate/NSPredicate.playground/Pages/HelloWorld.xcplaygroundpage#CharacterRangeLen=52&amp;CharacterRangeLoc=950&amp;EndingLineNumber=49&amp;StartingLineNumber=49&amp;Timestamp=459152495.90949"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "#CharacterRangeLen=44&amp;CharacterRangeLoc=1004&amp;EndingColumnNumber=45&amp;EndingLineNumber=51&amp;StartingColumnNumber=1&amp;StartingLineNumber=51&amp;Timestamp=459152495.909787"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=1164&amp;EndingColumnNumber=46&amp;EndingLineNumber=62&amp;StartingColumnNumber=9&amp;StartingLineNumber=62&amp;Timestamp=459152495.910064"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
+      </LoggerValueHistoryTimelineItem>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "#CharacterRangeLen=50&amp;CharacterRangeLoc=1152&amp;EndingColumnNumber=51&amp;EndingLineNumber=62&amp;StartingColumnNumber=1&amp;StartingLineNumber=62&amp;Timestamp=459152495.910301"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
+      </LoggerValueHistoryTimelineItem>
+   </TimelineItems>
+</Timeline>

NSPredicate/NSPredicate.playground/Pages/HowToUsePlaygrounds.xcplaygroundpage/Contents.swift

@@ -0,0 +1,19 @@
+//: [Previous](@previous)
+
+/*:
+# How to use this Playground
+
+- press ⌘ + 1 to show / hide all pages in this Playground
+
+![](pages.gif)
+
+- click on a Page to jump into it. Read & start writing code!
+- use the Previous / Next links to navigate through Pages
+- you can see the results of your code in the right bar or add add a quick look
+
+![](preview.gif)
+
+
+*/
+
+//: [Next](@next)

NSPredicate/NSPredicate.playground/Pages/HowToUsePlaygrounds.xcplaygroundpage/timeline.xctimeline

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+   </TimelineItems>
+</Timeline>

NSPredicate/NSPredicate.playground/Pages/KeyPaths.xcplaygroundpage/Contents.swift

@@ -0,0 +1,87 @@
+//: [Previous](@previous)
+
+
+/*:
+# Keypaths
+
+A keypath is, as its name implies, a way to traverse your object graph from object to object. For example, if you have a Person class and every person lives in a different Town, you can get the town's name using `somePerson.city.cityName`
+
+*/
+
+import Foundation
+
+class City: NSObject {
+    let name: String
+
+    init(name: String) {
+        self.name = name
+    }
+
+    // description lets you pretty print this class' instances in the sidebar
+    override var description: String {
+        return self.name
+    }
+}
+
+class Person: NSObject {    // Must inherit from NSObject
+    let name: String
+    let age: Int
+    let city: City?
+
+    init(name: String, age: Int, city: City) {
+        self.name = name
+        self.age = age
+        self.city = city
+    }
+
+    // description lets you pretty print this class' instances in the sidebar
+    override var description: String {
+        if let city = self.city {
+            return self.name + " - \(self.age) years old - \(city)"
+        }
+        return self.name + " - \(self.age) years old"
+
+    }
+}
+
+let sf = City(name: "San Francisco")
+let nyc = City(name: "New York")
+
+let groucho = Person(name: "Groucho", age: 50, city: nyc)
+let chicco = Person(name: "Chicco", age: 61, city: nyc)
+let harpo = Person(name: "Harpo", age: 45, city: sf)
+let zeppo = Person(name: "Zeppo", age: 61, city: sf)
+
+
+let people: NSArray = [groucho, chicco, harpo, zeppo]
+
+/*:
+
+Filter all people who lives in San Francisco, using a KeyPath
+
+*/
+
+let allInSF = NSPredicate(format: "%K = %@", "city.name", "San Francisco")
+people.filteredArrayUsingPredicate(allInSF)
+
+
+/*:
+
+💻 __EXERCISE__: filter all people living in New York
+
+*/
+
+
+
+
+/*:
+
+💻 __EXERCISE__: add a new class (State) with property name. Add State to the city. Filter all people living in the California State
+
+*/
+
+
+//: [Solved exercise - try to do it, it's better 😉](Solutions)
+
+
+//: [Next](@next)

NSPredicate/NSPredicate.playground/Pages/KeyPaths.xcplaygroundpage/timeline.xctimeline

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "#CharacterRangeLen=43&amp;CharacterRangeLoc=1609&amp;EndingColumnNumber=44&amp;EndingLineNumber=64&amp;StartingColumnNumber=1&amp;StartingLineNumber=64&amp;Timestamp=459153553.75978"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
+      </LoggerValueHistoryTimelineItem>
+   </TimelineItems>
+</Timeline>