moving all my practice work to this org

README.playground/Contents.swift

@@ -0,0 +1,72 @@
+import UIKit
+
+enum Currency {
+    case cad
+    case mxn
+}
+
+let usToCad = 1.30
+let usToMxn = 20.32
+var currency: Currency = .cad
+
+var currencyFormatter: NumberFormatter = {
+    let formatter = NumberFormatter()
+    formatter.numberStyle = .currency
+    return formatter
+}()
+
+func convert(_ dollars: Double) -> Double {
+    var result = 0.0
+    switch currency {
+    case .cad:
+        result = dollars * usToCad
+    case .mxn:
+        result = dollars * usToMxn
+    }
+    return result
+}
+
+func convert(amountString: String) -> String? {
+    guard let amount = Double(amountString) else { return "Amount string could not be converted" }
+    let conversionResult = convert(amount)
+    var resultString = ""
+
+    switch currency {
+    case .cad:
+        currencyFormatter.currencyCode = "CAD"
+        currencyFormatter.currencySymbol = "C$"
+        currencyFormatter.currencyDecimalSeparator = "."
+        currencyFormatter.currencyGroupingSeparator = ","
+        currencyFormatter.internationalCurrencySymbol = "C$"
+    case .mxn:
+        currencyFormatter.currencyCode = "MXN"
+        currencyFormatter.currencySymbol = "MX$"
+        currencyFormatter.currencyDecimalSeparator = "."
+        currencyFormatter.currencyGroupingSeparator = ","
+        currencyFormatter.internationalCurrencySymbol = "MX$"
+    }
+
+    if let unwrappedString = currencyFormatter.string(from: conversionResult as NSNumber) {
+        resultString = unwrappedString
+    } else {
+        resultString = "Number formatting failed."
+    }
+
+    return resultString
+}
+
+print(convert(100))
+if let successfulConversion = convert(amountString: "100") {
+    print(successfulConversion)
+}
+
+currency = .mxn
+
+print(convert(100))
+if let successfulConversion = convert(amountString: "100") {
+    print(successfulConversion)
+}
+
+
+
+

README.playground/contents.xcplayground

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='ios' buildActiveScheme='true' importAppTypes='true'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>