Option.getOrElse() like Scala in Haxe.

ExtendedOption.hx

import haxe.ds.Option;

class ExtendedOption {
  public static function getOrElse<T>(opt:Option<T>, defValue:T) {
      return switch(opt) {
          case Some(v): v;
          case None: defValue;
      }
  }
}

Sample.hx

import haxe.ds.Option;

using ExtendedOption;

class Sample {
    static var s = Some(1);
    static var n = None;

    public static function main(){
        trace(s.getOrElse(0));
        trace(n.getOrElse(0));        
    }
}

usage:
$ haxelib run ihx
＞＞ Sample.main();
Sample.hx:10: 1
Sample.hx:11: 0