Add Playground to swiftlint config

.swiftlint.yml

@@ -1,6 +1,7 @@
 included: # paths to include during linting. `--path` is ignored if present.
   - GEOSwift
   - GEOSwiftTests
+  - GEOSwift.playground
 disabled_rules:
   - force_cast
   - identifier_name

GEOSwift.playground/Contents.swift

@@ -3,12 +3,15 @@ import GEOSwift
 import MapKit
 
 Waypoint(WKT: "POINT(10 45)")
-//: > _Note:_ Build the GEOSwift framework scheme targeting an iOS Simulator prior to use this Playground. You may have to close and reopen the project after building it.
+//: > _Note:_ Build the GEOSwift framework scheme targeting an iOS Simulator prior to use this Playground.
+//: You may have to close and reopen the project after building it.
 //: # GEOSwift
 //: _The Swift Geographic Engine._
 //:
-//: Easily handle geographical objects (points, linestrings, polygons etc.) and the main related topographical operations (intersections, overlapping etc.).
-//: GEOSwift is basically a MIT-licensed Swift interface to the OSGeo's GEOS library routines*, plus some convenience features for iOS developers as:
+//: Easily handle geographical objects (points, linestrings, polygons etc.) and the main related topographical
+//: operations (intersections, overlapping etc.).
+//: GEOSwift is basically a MIT-licensed Swift interface to the OSGeo's GEOS library routines*, plus some convenience
+//: features for iOS developers as:
 //:
 //: * A pure-Swift, type-safe, optional-aware programming interface
 //: * Automatically-typed geometry deserialization from WKT and WKB representations
@@ -29,12 +32,16 @@ Waypoint(WKT: "POINT(10 45)")
 //: * MultiPolygon
 //: * GeometryCollection
 //: 
-//: Geometries can be deserialized from and serialized back to their Well Known Text (WKT) or Well Known Binary (WKB) representations, as they are defined in the _[Simple features for SQL](http://www.opengeospatial.org/standards/sfa)_ specification.  
-//: The default spatial reference system for geometry fields is WGS84 (meaning the SRID is 4326) – in other words, the geometry coordinates are in longitude, latitude pairs in units of degrees.
+//: Geometries can be deserialized from and serialized back to their Well Known Text (WKT) or Well Known Binary (WKB)
+//: representations, as they are defined in the _[Simple features for SQL](http://www.opengeospatial.org/standards/sfa)_
+//: specification.
+//: The default spatial reference system for geometry fields is WGS84 (meaning the SRID is 4326) – in other words, the
+//: geometry coordinates are in longitude, latitude pairs in units of degrees.
 // Create a POINT from its WKT representation.
 let point = Waypoint(WKT: "POINT(10 45)")
 
-// A geometry can be created even using the constructor `Geometry.create(WKT)` and casting the returned value to the desired subclass.
+// A geometry can be created even using the constructor `Geometry.create(WKT)` and casting the returned value to the
+// desired subclass.
 let geometry1 = Geometry.create("POLYGON((35 10, 45 45.5, 15 40, 10 20, 35 10),(20 30, 35 35, 30 20, 20 30))")
 
 // The same geometry can be represented in binary form as a Well Known Binary.
@@ -54,31 +61,30 @@ if geometry1 == geometry2 && geometry1 != point {
 // MULTILINESTRING((3 4,10 50,20 25),(-5 -8,-10 -8,-15 -4))
 // MULTIPOLYGON(((1 1,5 1,5 5,1 5,1 1),(2 2, 3 2, 3 3, 2 3,2 2)),((3 3,6 2,6 4,3 3)))
 // GEOMETRYCOLLECTION(POINT(4 6),LINESTRING(4 6,7 10))
-
 //: ### Mapkit integration
 //:
 //: Convert the geometries to a MKShape subclass, ready to be added as annotations to a MKMapView
 //:
 let shape1 = point!.mapShape()!
  let shape2 = geometry1?.mapShape()!
  let annotations = [shape1, shape2]
-
 //: ### Quicklook integration
 //:
 //: GEOSwift geometries are integrated with Quicklook!
-//: This means that while debugging you can inspect complex geometries and see what they represent: just stop on the variable with the mouse cursor or select the Geometry instance and press backspace in the Debug Area to see a preview.
+//: This means that while debugging you can inspect complex geometries and see what they represent: just stop on the
+//: variable with the mouse cursor or select the Geometry instance and press backspace in the Debug Area to see a
+//: preview.
 //: In Playgrounds you can display them just as any other object, like this:
 geometry2
-
 //: ### GEOJSON parsing
 //:
 //: Your geometries can be loaded from a GEOJSON file.
 //:
 if let geoJSONURL = Bundle.main.url(forResource: "multipolygon", withExtension: "geojson"),
-    let features = try! Features.fromGeoJSON(geoJSONURL),
-    let italy = features.first?.geometries?.first as? MultiPolygon {
-    italy
+    let features = try? Features.fromGeoJSON(geoJSONURL),
+    let italy = features?.first?.geometries?.first as? MultiPolygon {
 
+    italy
 //: ### Topological operations:
 //:
     italy.buffer(width: 1)
@@ -91,7 +97,6 @@ if let geoJSONURL = Bundle.main.url(forResource: "multipolygon", withExtension:
     italy.intersection(geometry2!)
     italy.difference(geometry2!)
     italy.union(geometry2!)
-
 //: ### Predicates:
 //: 
     italy.disjoint(geometry2!)
@@ -103,8 +108,12 @@ if let geoJSONURL = Bundle.main.url(forResource: "multipolygon", withExtension:
     italy.overlaps(geometry2!)
     italy.equals(geometry2!)
     italy.relate(geometry2!, pattern: "T*****FF*")
-
 }
-//: [GEOS](http://trac.osgeo.org/geos/) stands for Geometry Engine - Open Source, and is a C++ library, ported from the [Java Topology Suite](http://sourceforge.net/projects/jts-topo-suite/). GEOS implements the OpenGIS [Simple Features for SQL](http://www.opengeospatial.org/standards/sfs) spatial predicate functions and spatial operators. GEOS, now an OSGeo project, was initially developed and maintained by [Refractions Research](http://www.refractions.net/) of Victoria, Canada.
+//: [GEOS](http://trac.osgeo.org/geos/) stands for Geometry Engine - Open Source, and is a C++ library, ported from the
+//: [Java Topology Suite](http://sourceforge.net/projects/jts-topo-suite/). GEOS implements the OpenGIS [Simple Features
+//: for SQL](http://www.opengeospatial.org/standards/sfs) spatial predicate functions and spatial operators. GEOS, now
+//: an OSGeo project, was initially developed and maintained by [Refractions Research](http://www.refractions.net/) of
+//: Victoria, Canada.
 //:
-//: GEOSwift was released by Andrea Cremaschi ([@andreacremaschi](https://twitter.com/andreacremaschi)) under a MIT license. See LICENSE for more information.
+//: GEOSwift was released by Andrea Cremaschi ([@andreacremaschi](https://twitter.com/andreacremaschi)) under a MIT
+//: license. See LICENSE for more information.

GEOSwift.playground/Sources/SupportCode.swift

@@ -1,5 +1,6 @@
 //
-// This file (and all other Swift source files in the Sources directory of this playground) will be precompiled into a framework which is automatically made available to GEOSwiftPlayground.playground.
+// This file (and all other Swift source files in the Sources directory of this playground)
+// will be precompiled into a framework which is automatically made available to GEOSwiftPlayground.playground.
 //
 
 import Foundation
@@ -8,22 +9,21 @@ extension NSData {
     public class func fromHexString (string: String) -> NSData {
         // Based on: http://stackoverflow.com/a/2505561/313633
         let data = NSMutableData()
-
         var temp = ""
-
-        for char in string.characters {
-            temp+=String(char)
-            if(temp.characters.count == 2) {
+        for char in string {
+            temp += String(char)
+            if temp.count == 2 {
                 let scanner = Scanner(string: temp)
                 var value: CUnsignedInt = 0
                 scanner.scanHexInt32(&value)
                 data.append(&value, length: 1)
                 temp = ""
             }
         }
-        return data as NSData
+        return data
     }
 }
 
+// swiftlint:disable:next line_length
 let geometryWKBHexString = "010300000002000000050000000000000000804140000000000000244000000000008046400000000000C046400000000000002E40000000000000444000000000000024400000000000003440000000000080414000000000000024400400000000000000000034400000000000003E40000000000080414000000000008041400000000000003E40000000000000344000000000000034400000000000003E40"
 public func geometryWKB() -> NSData { return NSData.fromHexString(string: geometryWKBHexString) }