llv22 - swift learning in topcoder

Author: llv22

swift/TopCoderPlayground.playground/contents.xcplayground

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='3.0' sdk='macosx'>
+    <sections>
+        <code source-file-name='section-1.swift'/>
+    </sections>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>

swift/TopCoderPlayground.playground/section-1.swift

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+// Playground - noun: a place where people can play
+// Learn swift from http://tc-learnswift.herokuapp.com/problems?handle=llv22
+
+import Foundation
+
+// Challenge 21 – Super-Duper Shopping Cart (Use Xcode6-Beta6)
+
+/**
+R1 – Create a constant array of string literals called “types” with these
+values: book, CD, software
+**/
+// implement code for R1 below
+let types = ["book", "CD", "software"];
+
+
+/**
+
+R2 – Create a “Customer” struct with a “name” and “email” property
+**/
+// implement code for R2 below
+struct Customer{
+    
+}
+
+
+/**
+
+R3 – Create a “randomCustomer” function that returns a tuple. Add 3
+
+Customer structs to a dictionary using the customer’s name as the key.
+This function returns a randomly selected name and email of a Customer
+from the dictionary. (Hint: you can use arc4random_uniform to
+randomly select a value.)
+**/
+// implement code for R3 below
+
+
+
+/**
+
+R4 – Create a “Product” class with the following properties:
+1. id – Int
+2. name – String
+3. type – Constant, randomly selected value from “types” array
+4. price – Double
+5. discount – Double
+6. saleStatus – String
+
+Create an initializer that set’s the name, price and discount. The
+discount should be set to 0 if discount is not passed. Set the
+id to a random number between 1 and 10,000.
+
+Create a getter for “saleStatus” that returns the String
+“Sorry. This product is not on sale.” if dicsount is 0. Else
+return the interpolated string “This product is on sale. It was
+[display original price] but with a discount you only pay
+[display sale price].”
+**/
+// implement code for R4 below
+
+
+
+/**
+
+R5 – Create an array called “products” with 5 product objects. Their names are
+irrelevant but chose different prices. Set the discounts to 0, 0.1, 0.2, 0.3
+and 0.4 respectively.
+
+After adding the items to the array, iterate the collection and println the
+“saleStatus” for each item.
+**/
+// implement code for R5 below
+
+
+
+/**
+
+R6 – Write a simple “Cart” class using Generics with the following properties:
+1. customerName – String
+2. customerEmail – String
+3. items – any array of any type T
+4. itemCount – Int, getter that returns the count of items in “items”.
+5. promoCode – Optional String set to nil
+
+Create an initializer that set the customerName and customerEmail.
+
+Implement the following functions:
+
+1. Create an “add” method that appends any type to the “items” array.
+2. Create a “clear” method that removes all items from the “items” array.
+3. Create a “remove” method that removes an item from the “items” array
+based upon its position in the array.
+4. Create a “getPromoCodeDisplay” method that returns the String “Your
+promo code is [display promoCode].” if promoCode is not nil. Otherwise,
+return the String “You do not have a promo code.”.
+5. Create a “getCartStatus” method that returns the String “You have no
+items in your cart.” if the number of items in the “items” array is 0.
+Return the String “You have [display number of items] items in your
+cart.” if the number of items in the “items” array is 1, 2 or 3.
+For 4+ items in the “items” array, return the String “You are an
+awesome customer!!”
+**/
+// implement code for R6 below
+
+
+
+/**
+
+R7 – Create a “customer” object by calling the “randomCustomer” function.
+Create a new “cart” object for type Product with the newly created
+“customer” object’s name and email. Printlnt customer’s name. Println the
+itemCount (should be 0). Println the getCartStatus which should display
+“You have no items in your cart.”
+**/
+// implement code for R7 below
+
+
+
+/**
+
+R8 – iterate the “products” array and add all items from the “products”
+array to the cart except for element 3. Println the itemCount (should be 4),
+println getStatus() (should display “You are an awesome customer!!”). Assign
+the customer a promo code. First, println getPromoCodeDisplay (should
+display “You do not have a promo code.”), then set the promoCode to “1234″,
+then println the getPromoCodeDisplay again (should display “Your promo code
+is 1234.”).
+**/
+// implement code for R8 below
+
+
+
+/**
+R9 – Remove the first item from the cart, then println the itemCount (should
+be 3) and println the getCartStatus which should display “You have 3 items
+in your cart.”
+**/
+// implement code for R9 below
+
+

swift/TopCoderPlayground.playground/timeline.xctimeline

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+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+   </TimelineItems>
+</Timeline>