CodingChallenges

challenge1.playground/Contents.swift

@@ -0,0 +1,20 @@
+//Challenge 1
+
+import UIKit
+
+func swap(inout var1: Any, inout with var2: Any) { (var1, var2) = (var2, var1) }
+
+var var1 = "hi", var2 = "bye"
+swap(&var1, &var2)
+
+[var1, var2]
+
+
+
+
+
+
+
+
+
+

challenge1.playground/contents.xcplayground

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

challenge2.playground/Contents.swift

@@ -0,0 +1,26 @@
+//: Playground - noun: a place where people can play
+
+
+func flexSrings(s1: String?, s2: String?) -> String
+{
+    if (s1==nil && s2==nil) {
+        return("none")
+    }
+
+    if (s2==nil && s1 != nil) {
+        return(s1!)
+    }
+
+    else {
+        return (s1!+s2!)
+    }
+
+}
+
+
+flexSrings(nil, s2: nil)
+
+
+
+
+

challenge2.playground/contents.xcplayground

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

challenge3.playground/Contents.swift

@@ -0,0 +1,48 @@
+func sumAny(inputs: Any...) -> String {
+
+    var total: Int = 0
+
+    // add -10 if string is empty
+    if (inputs.isEmpty) {
+        total += -10
+    }
+
+    var i = 0
+
+
+    // loop over all inputs
+    while (i<inputs.count) {
+
+        // check if input type is an Int
+        if (inputs[i] is Int) {
+            let inputVar = inputs[i] as! Int // makes input an int iff it is an int
+
+            // add -10 if input == 0
+            if (inputVar == 0) {
+            total += -10
+            }
+
+            else {
+               total += inputVar
+            }
+        }
+
+        // check if input type is a string
+        if ((inputs[i] is String)) {
+            let inputString = String(inputs[i]) // assigns a variable to input iff it is a string
+
+            if let inputVar = Int(inputString) { // changes string to an Int iff it is an integer that was just passed as a string
+
+                // add a string value iff it is positive number
+                if (inputVar >= 0) {
+                    total += inputVar
+                }
+            }
+        }
+        i += 1 // count to iterate over all inputs
+    }
+
+    let totalString = String(total)
+    return totalString
+    }
+print(sumAny("Marin Rood", 2, 22, "10", 0, 33, -5))

challenge3.playground/contents.xcplayground

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

challenge4.playground/Contents.swift

@@ -0,0 +1,9 @@
+func countFrom(from: Int, to: Int) {
+    print(from)
+
+    if (from < to) {
+        countFrom(from + 1, to: to)
+    }
+}
+
+countFrom(1, to: 5)

challenge4.playground/contents.xcplayground

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