isoiphone

import Foundation

// based on: http://stackoverflow.com/questions/18118021/how-to-resize-superview-to-fit-all-subviews-with-autolayout
// required so we can have multiline labels properly resize their height based on content

class MultilineLabel: UILabel {
    override func layoutSubviews() {
        super.layoutSubviews()
        
        if numberOfLines == 0 && preferredMaxLayoutWidth != CGRectGetWidth(frame) {

isoiphone

// trying to add objectsAtIndexes() to compatible swift arrays, such as [Int]
// compiler error: 'Array<T>' is not convertible to 'NSArray'
extension Array {
    func objectsAtIndexes<T: AnyObject>(indexes: NSIndexSet) -> Array<T> {
        return (self as NSArray).objectsAtIndexes(indexes) as! Array<T>
    }
}

isoiphone

let navigationBarAppearance = UINavigationBar.appearance()
let previousColor = navigationBarAppearance.barTintColor
navigationBarAppearance.barTintColor = .whiteColor()

let mailCompose = MFMailComposeViewController()

navigationBarAppearance.barTintColor = previousColor

isoiphone

        dispatch_once(&_migrationToken) {
            // scorched-earth data migration policy
            RLMRealm.setSchemaVersion(1, forRealmAtPath: path) { (migration, oldSchemaVersion) in
                for schema in migration.oldSchema.objectSchema {
                    migration.enumerateObjects(schema.className) { (oldObject, newObject) in
                        migration.deleteObject(newObject)
                    }
                }
            }
        }

isoiphone

    func configureRealm() {
        let basePath = RLMRealm.defaultRealmPath()
        println("realm path: \(basePath)")

        let allPaths = [basePath,
                        basePath.stringByAppendingPathExtension("lock")!,
                        basePath.stringByAppendingPathExtension("log")!,
                        basePath.stringByAppendingPathExtension("log_a")!,
                        basePath.stringByAppendingPathExtension("log_b")!]
        

isoiphone

// takes ~50 seconds to compile.
// tested on XCode 6.3 Beta 4, late 2013 macbook pro retina

import Foundation

func CompileSmash() {
    var arr: [AnyObject] = [1,2,3]
    arr = arr + arr + arr + arr + arr
}

isoiphone

extension String {
    func beginsWith(prefix: String) -> Bool {
        return count(self) >= count(prefix)
            && substringWithRange( Range<String.Index>(start: startIndex, end: advance(startIndex, count(prefix))) ) == prefix
    }
}

isoiphone

var p = 0.0
for var k=0.0; k<100.0;++k {
    let rest: Double = 4.0/(8*k+1) - 2.0/(8*k+4) - 1.0/(8*k+5) - 1.0/(8*k+6)
    p += pow(16.0, -k) * rest
    println("\(p)")
}

isoiphone

var qp = 0.0
for var n=0.0; ;++n {
    qp += (1-(n%2)*2)/(2*n+1)
    println("\(qp*4)")
}

isoiphone

extension RLMRealm {
    static var threadInstance: RLMRealm! {
        let threadDictionary = NSThread.currentThread().threadDictionary
        if let inst = threadDictionary["SharedRealmInst"] as! RLMRealm? {
            return inst
        } else {
            let inst = defaultRealmWithErrorHandling()
            threadDictionary["SharedRealmInst"] = inst
            return inst
        }