TypeScript Cheat Sheet by GregFinzer

class OrderLogic {
    constructor(public order: IOrder) {  }

    getOrderTotal(): number {
        let sum: number = 0;

        for (let orderDetail of this.order.orderDetails)
        {
            sum += orderDetail.price;
        }
        return sum;
    }
}

abstract class Person {
  name: string;
  monthlySalary: number;
  monthlyBenefits: number;

  abstract calcSalary(): number;
}

interface IGPS {
  getLocation() number;
}

interface ISelfDrive extends IGPS {
  drive(latitude: number, longitude: number, elevation: number) : void;
}

class Vehicle {
  make: string;
  model:  string;
  year:  number;
}

class FlyingCar extends Vehicle  implements ISelfDrive {
   hasGps: boolean;

  drive(latitude: number, longitude: number, elevation: number)  {
  }

  getLocation(): number {
  }
}

interface IOrderDetail {
  productName: string;
  quantity: number;
  price: number;
  orderDate: Date;
  shipped: boolean;
  //Optional
  outOfStock?: boolean;
  //Method
  calcTax: (taxRate: number) => number;
}

class Util {
  log(msg: string, logDate?: Date) {
    if (logDate)
      console.log(logDate + ' ' + msg);
    else
      console.log(new Date() + ' ' + msg);
  }
}

class Order {
  addOrderDetails(...orderDetails: IOrderDetail[]) {
  }
}

namespace AcmeCorp.Logging {
  export class Logger {
       static log(msg: string) : void {
        console.log(msg);
      };
  }
}

/// <reference path="AcmeCorp.Logging.ts" />

//Alias
import logger = AcmeCorp.Logging.Logger;

namespace AcmeCorp.OnlineStore {
  class OrderLogic {
    calcOrder(): number {
        logger.log("calculating order");
        return 0;
    }
  }
}