99 Bottles of Beer On The Playground

beer.playground

import Cocoa

let beers = 0...99
for beer in beers.reversed() {
    let initial = String.localizedStringWithFormat(NSLocalizedString("beers_on_wall", comment: ""), beer, beer)
    let nextStep = String.localizedStringWithFormat(NSLocalizedString("next_step", comment: ""), beer)
    
    var nextBeer = beer - 1
    if nextBeer < 0 {
        nextBeer = beers.max()!
    }
    
    let afterNext = String.localizedStringWithFormat(NSLocalizedString("after_next_step", comment: ""), nextBeer)

    print("\(initial)\n\(nextStep) \(afterNext)\n")
}

Resources-en.lproj-Localizable.stringsdict

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>beers_on_wall</key>
	<dict>
		<key>NSStringLocalizedFormatKey</key>
		<string>%#@beers@</string>
		<key>beers</key>
		<dict>
			<key>NSStringFormatSpecTypeKey</key>
			<string>NSStringPluralRuleType</string>
			<key>NSStringFormatValueTypeKey</key>
			<string>d</string>
			<key>other</key>
			<string>%d bottles of beer on the wall, %d bottles of beer!</string>
			<key>one</key>
			<string>%d bottle of beer on the wall, %d bottle of beer!</string>
			<key>zero</key>
			<string>No bottles of beer on the wall, no bottles of beer!</string>
		</dict>
	</dict>
	<key>next_step</key>
	<dict>
		<key>NSStringLocalizedFormatKey</key>
		<string>%#@next@</string>
		<key>next</key>
		<dict>
			<key>NSStringFormatSpecTypeKey</key>
			<string>NSStringPluralRuleType</string>
			<key>NSStringFormatValueTypeKey</key>
			<string>d</string>
			<key>other</key>
			<string>Take one down, pass it around,</string>
			<key>one</key>
			<string>Take one down, pass it around,</string>
			<key>zero</key>
			<string>Go to the store and buy more beer,</string>
		</dict>
	</dict>
	<key>after_next_step</key>
	<dict>
		<key>NSStringLocalizedFormatKey</key>
		<string>%#@after_next@</string>
		<key>after_next</key>
		<dict>
			<key>NSStringFormatSpecTypeKey</key>
			<string>NSStringPluralRuleType</string>
			<key>NSStringFormatValueTypeKey</key>
			<string>d</string>
			<key>other</key>
			<string>%d bottles of beer on the wall.</string>
			<key>one</key>
			<string>%d bottle of beer on the wall.</string>
			<key>zero</key>
			<string>no bottles of beer on the wall.</string>
		</dict>
	</dict>
</dict>
</plist>

To get this to run on a system where the language is English, put the Localizable.stringsDict at the path Resources/en.lproj/Localizable.stringsDict. If your system language is not in english, you'll need to put it in an lproj folder that corresponds with your language.

I couldn't get it to work in Resources/en.lproj/Localizable.stringsdict or stringsDict ... but it works in the ~/Documents/Shared Playground Data/Localizable.stringsdict. Here's my version

Thanks!