Challenges

challeng.playground/Contents.swift

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+import UIKit
+
+var greeting = "Hello, playground"
+
+var array1 = [2,4,6,4,9,6,2]
+var array2 = [1,1,2]
+var array3 = [2,2,1]
+
+
+  for x in array1 {
+    if x == 9 {
+      print(x)
+    }}
+
+    for y in array2 {
+      if y == 2 {
+        print(y)
+      }
+    }
+  for z in array3 {
+    if z == 1 {
+      print(z)
+
+    }
+  }
+
+//__________________________________________
+
+var arr1 :[Any] = [1,[2,3,nil,4],[nil],5]
+var arr2 : [Any] = [7, 0,[nil],[nil, nil, 9]]
+var arr3 : [Any] = [[nil, 3], [2, 4, 5, nil], 0, 8, 3]
+var arr4 : [Any] = [3, 5, [5, 9, 0]]
+
+for x in arr1 {
+  if x != nil {
+    print(x)
+  }
+}
+
+  for x in arr2 {
+    if x != nil {
+      print(x)
+    }
+}
+
+for x in arr3 {
+  if x != nil {
+    print(x)
+  }
+}
+
+for x in arr4 {
+  if x != nil {
+    print(x)
+  }
+}
+

challeng.playground/contents.xcplayground

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+<?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>

challeng.playground/timeline.xctimeline

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+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+      <LoggerValueHistoryTimelineItem
+         documentLocation = "file:///Users/ralthebailah/Desktop/challeng.playground#CharacterRangeLen=0&amp;CharacterRangeLoc=320&amp;EndingColumnNumber=0&amp;EndingLineNumber=25&amp;StartingColumnNumber=0&amp;StartingLineNumber=25&amp;Timestamp=668438182.74646"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
+      </LoggerValueHistoryTimelineItem>
+   </TimelineItems>
+</Timeline>