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		<id>https://www.techotopia.com/index.php?action=history&amp;feed=atom&amp;title=Understanding_Error_Handling_in_Swift_2</id>
		<title>Understanding Error Handling in Swift 2 - Revision history</title>
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		<updated>2026-05-11T01:20:17Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
		<generator>MediaWiki 1.26.2</generator>

	<entry>
		<id>https://www.techotopia.com/index.php?title=Understanding_Error_Handling_in_Swift_2&amp;diff=31588&amp;oldid=prev</id>
		<title>Neil: /* Understanding Error Handling */</title>
		<link rel="alternate" type="text/html" href="https://www.techotopia.com/index.php?title=Understanding_Error_Handling_in_Swift_2&amp;diff=31588&amp;oldid=prev"/>
				<updated>2016-11-10T04:21:05Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Understanding Error Handling&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table class=&#039;diff diff-contentalign-left&#039;&gt;
				&lt;col class=&#039;diff-marker&#039; /&gt;
				&lt;col class=&#039;diff-content&#039; /&gt;
				&lt;col class=&#039;diff-marker&#039; /&gt;
				&lt;col class=&#039;diff-content&#039; /&gt;
				&lt;tr style=&#039;vertical-align: top;&#039; lang=&#039;en&#039;&gt;
				&lt;td colspan=&#039;2&#039; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&#039;2&#039; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 04:21, 10 November 2016&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l17&quot; &gt;Line 17:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 17:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Understanding Error Handling ==&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== Understanding Error Handling ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;&amp;lt;htmlet&amp;gt;adsdaqbox_flow&amp;lt;/htmlet&amp;gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;No matter how carefully Swift code is designed and implemented, there will invariably be situations that are beyond the control of the app. An app that relies on an active internet connection cannot, for example, control the loss of signal on an iPhone device, or prevent the user from enabling “airplane mode”. What the app can do, however, is to implement robust handling of the error (for example displaying a message indicating to the user that the app requires an active internet connection to proceed).&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;No matter how carefully Swift code is designed and implemented, there will invariably be situations that are beyond the control of the app. An app that relies on an active internet connection cannot, for example, control the loss of signal on an iPhone device, or prevent the user from enabling “airplane mode”. What the app can do, however, is to implement robust handling of the error (for example displaying a message indicating to the user that the app requires an active internet connection to proceed).&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Neil</name></author>	</entry>

	<entry>
		<id>https://www.techotopia.com/index.php?title=Understanding_Error_Handling_in_Swift_2&amp;diff=31158&amp;oldid=prev</id>
		<title>Neil at 20:57, 1 November 2016</title>
		<link rel="alternate" type="text/html" href="https://www.techotopia.com/index.php?title=Understanding_Error_Handling_in_Swift_2&amp;diff=31158&amp;oldid=prev"/>
				<updated>2016-11-01T20:57:17Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&#039;diff diff-contentalign-left&#039;&gt;
				&lt;col class=&#039;diff-marker&#039; /&gt;
				&lt;col class=&#039;diff-content&#039; /&gt;
				&lt;col class=&#039;diff-marker&#039; /&gt;
				&lt;col class=&#039;diff-content&#039; /&gt;
				&lt;tr style=&#039;vertical-align: top;&#039; lang=&#039;en&#039;&gt;
				&lt;td colspan=&#039;2&#039; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&#039;2&#039; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 20:57, 1 November 2016&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l4&quot; &gt;Line 4:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 4:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;td width=&amp;quot;20%&amp;quot;&amp;gt;[[Working with Array and Dictionary Collections in Swift|Previous]]&amp;lt;td align=&amp;quot;center&amp;quot;&amp;gt;[[iOS 8 App Development Essentials|Table of Contents]]&amp;lt;td width=&amp;quot;20%&amp;quot; align=&amp;quot;right&amp;quot;&amp;gt;[[Creating an Interactive iOS 8 App (Swift)|Next]]&amp;lt;/td&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;td width=&amp;quot;20%&amp;quot;&amp;gt;[[Working with Array and Dictionary Collections in Swift|Previous]]&amp;lt;td align=&amp;quot;center&amp;quot;&amp;gt;[[iOS 8 App Development Essentials|Table of Contents]]&amp;lt;td width=&amp;quot;20%&amp;quot; align=&amp;quot;right&amp;quot;&amp;gt;[[Creating an Interactive iOS 8 App (Swift)|Next]]&amp;lt;/td&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;tr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;tr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;td width=&amp;quot;20%&amp;quot;&amp;gt;Working with Array and Dictionary Collections in Swift&amp;lt;td align=&amp;quot;center&amp;quot;&amp;gt;&amp;lt;td width=&amp;quot;20%&amp;quot; align=&amp;quot;right&amp;quot;&amp;gt;Creating an Interactive iOS 10 App &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;(Swift)&lt;/del&gt;&amp;lt;/td&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;td width=&amp;quot;20%&amp;quot;&amp;gt;Working with Array and Dictionary Collections in Swift&amp;lt;td align=&amp;quot;center&amp;quot;&amp;gt;&amp;lt;td width=&amp;quot;20%&amp;quot; align=&amp;quot;right&amp;quot;&amp;gt;Creating an Interactive iOS 10 App&amp;lt;/td&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;/table&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;/table&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;hr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;hr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Neil</name></author>	</entry>

	<entry>
		<id>https://www.techotopia.com/index.php?title=Understanding_Error_Handling_in_Swift_2&amp;diff=31157&amp;oldid=prev</id>
		<title>Neil at 20:56, 1 November 2016</title>
		<link rel="alternate" type="text/html" href="https://www.techotopia.com/index.php?title=Understanding_Error_Handling_in_Swift_2&amp;diff=31157&amp;oldid=prev"/>
				<updated>2016-11-01T20:56:51Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&#039;diff diff-contentalign-left&#039;&gt;
				&lt;col class=&#039;diff-marker&#039; /&gt;
				&lt;col class=&#039;diff-content&#039; /&gt;
				&lt;col class=&#039;diff-marker&#039; /&gt;
				&lt;col class=&#039;diff-content&#039; /&gt;
				&lt;tr style=&#039;vertical-align: top;&#039; lang=&#039;en&#039;&gt;
				&lt;td colspan=&#039;2&#039; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&#039;2&#039; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 20:56, 1 November 2016&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l2&quot; &gt;Line 2:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 2:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;seo title=&amp;quot;Understanding Error Handling in Swift 3&amp;quot; titlemode=&amp;quot;replace&amp;quot; keywords=&amp;quot;ios 10, swift 3, error handling, guard, try, defer&amp;quot;&amp;#160; description=&amp;quot;A guide to error handling in Swift 3 using the guard, try, defer and throws statements&amp;quot;&amp;gt;&amp;lt;/seo&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;seo title=&amp;quot;Understanding Error Handling in Swift 3&amp;quot; titlemode=&amp;quot;replace&amp;quot; keywords=&amp;quot;ios 10, swift 3, error handling, guard, try, defer&amp;quot;&amp;#160; description=&amp;quot;A guide to error handling in Swift 3 using the guard, try, defer and throws statements&amp;quot;&amp;gt;&amp;lt;/seo&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;table border=&amp;quot;0&amp;quot; cellspacing=&amp;quot;0&amp;quot; width=&amp;quot;100%&amp;quot;&amp;gt;&amp;lt;tr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;table border=&amp;quot;0&amp;quot; cellspacing=&amp;quot;0&amp;quot; width=&amp;quot;100%&amp;quot;&amp;gt;&amp;lt;tr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;td width=&amp;quot;20%&amp;quot;&amp;gt;[[Working with Array and Dictionary Collections in Swift|Previous]]&amp;lt;td align=&amp;quot;center&amp;quot;&amp;gt;[[iOS 8 App Development Essentials|Table of Contents]]&amp;lt;td width=&amp;quot;20%&amp;quot; align=&amp;quot;right&amp;quot;&amp;gt;[[Creating an Interactive iOS &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;9 &lt;/del&gt;App|Next]]&amp;lt;/td&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;td width=&amp;quot;20%&amp;quot;&amp;gt;[[Working with Array and Dictionary Collections in Swift|Previous]]&amp;lt;td align=&amp;quot;center&amp;quot;&amp;gt;[[iOS 8 App Development Essentials|Table of Contents]]&amp;lt;td width=&amp;quot;20%&amp;quot; align=&amp;quot;right&amp;quot;&amp;gt;[[Creating an Interactive iOS &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;8 &lt;/ins&gt;App &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;(Swift)&lt;/ins&gt;|Next]]&amp;lt;/td&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;tr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;tr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;td width=&amp;quot;20%&amp;quot;&amp;gt;Working with Array and Dictionary Collections in Swift&amp;lt;td align=&amp;quot;center&amp;quot;&amp;gt;&amp;lt;td width=&amp;quot;20%&amp;quot; align=&amp;quot;right&amp;quot;&amp;gt;Creating an Interactive iOS &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;9 &lt;/del&gt;App&amp;lt;/td&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;td width=&amp;quot;20%&amp;quot;&amp;gt;Working with Array and Dictionary Collections in Swift&amp;lt;td align=&amp;quot;center&amp;quot;&amp;gt;&amp;lt;td width=&amp;quot;20%&amp;quot; align=&amp;quot;right&amp;quot;&amp;gt;Creating an Interactive iOS &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;10 &lt;/ins&gt;App &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;(Swift)&lt;/ins&gt;&amp;lt;/td&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;/table&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;/table&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;hr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;hr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l187&quot; &gt;Line 187:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 187:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;hr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;hr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;table border=&amp;quot;0&amp;quot; cellspacing=&amp;quot;0&amp;quot; width=&amp;quot;100%&amp;quot;&amp;gt;&amp;lt;tr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;table border=&amp;quot;0&amp;quot; cellspacing=&amp;quot;0&amp;quot; width=&amp;quot;100%&amp;quot;&amp;gt;&amp;lt;tr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;td width=&amp;quot;20%&amp;quot;&amp;gt;[[Working with Array and Dictionary Collections in Swift 2|Previous]]&amp;lt;td align=&amp;quot;center&amp;quot;&amp;gt;[[iOS 9 App Development Essentials|Table of Contents]]&amp;lt;td width=&amp;quot;20%&amp;quot; align=&amp;quot;right&amp;quot;&amp;gt;[[Creating an Interactive iOS &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;9 &lt;/del&gt;App|Next]]&amp;lt;/td&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;td width=&amp;quot;20%&amp;quot;&amp;gt;[[Working with Array and Dictionary Collections in Swift 2|Previous]]&amp;lt;td align=&amp;quot;center&amp;quot;&amp;gt;[[iOS 9 App Development Essentials|Table of Contents]]&amp;lt;td width=&amp;quot;20%&amp;quot; align=&amp;quot;right&amp;quot;&amp;gt;[[Creating an Interactive iOS &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;8 &lt;/ins&gt;App &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;(Swift)&lt;/ins&gt;|Next]]&amp;lt;/td&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;tr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;tr&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;td width=&amp;quot;20%&amp;quot;&amp;gt;Working with Array and Dictionary Collections in Swift 2&amp;lt;td align=&amp;quot;center&amp;quot;&amp;gt;&amp;lt;td width=&amp;quot;20%&amp;quot; align=&amp;quot;right&amp;quot;&amp;gt;Creating an Interactive iOS &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;9 &lt;/del&gt;App&amp;lt;/td&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;td width=&amp;quot;20%&amp;quot;&amp;gt;Working with Array and Dictionary Collections in Swift 2&amp;lt;td align=&amp;quot;center&amp;quot;&amp;gt;&amp;lt;td width=&amp;quot;20%&amp;quot; align=&amp;quot;right&amp;quot;&amp;gt;Creating an Interactive iOS &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;10 &lt;/ins&gt;App&amp;lt;/td&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;/table&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&#039;diff-marker&#039;&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;/table&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Neil</name></author>	</entry>

<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" ><!--LINE 1--></td>
<td colspan="2" class="diff-lineno"><!--LINE 1--></td></tr>
<tr><td class='diff-marker'>&#160;</td><td class='diff-context'><div>{{#pagetitle: Understanding Error Handling in Swift 3 }}</div></td><td class='diff-marker'>&#160;</td><td class='diff-context'><div>{{#pagetitle: Understanding Error Handling in Swift 3 }}</div></td></tr>
Exception encountered, of type &quot;Error&quot;<br />
[3b12f039] /index.php?action=history&amp;feed=atom&amp;title=Understanding_Error_Handling_in_Swift_2   Error from line 434 of /var/www/techotopia/includes/diff/DairikiDiff.php: Call to undefined function each()<br />
Backtrace:<br />
#0 /var/www/techotopia/includes/diff/DairikiDiff.php(544): DiffEngine-&gt;diag()<br />
#1 /var/www/techotopia/includes/diff/DairikiDiff.php(344): DiffEngine-&gt;compareSeq()<br />
#2 /var/www/techotopia/includes/diff/DairikiDiff.php(227): DiffEngine-&gt;diffLocal()<br />
#3 /var/www/techotopia/includes/diff/DairikiDiff.php(721): DiffEngine-&gt;diff()<br />
#4 /var/www/techotopia/includes/diff/DairikiDiff.php(859): Diff-&gt;__construct()<br />
#5 /var/www/techotopia/includes/diff/DairikiDiff.php(980): MappedDiff-&gt;__construct()<br />
#6 /var/www/techotopia/includes/diff/TableDiffFormatter.php(194): WordLevelDiff-&gt;__construct()<br />
#7 /var/www/techotopia/includes/diff/DiffFormatter.php(140): TableDiffFormatter-&gt;changed()<br />
#8 /var/www/techotopia/includes/diff/DiffFormatter.php(82): DiffFormatter-&gt;block()<br />
#9 /var/www/techotopia/includes/diff/DifferenceEngine.php(881): DiffFormatter-&gt;format()<br />
#10 /var/www/techotopia/includes/diff/DifferenceEngine.php(797): DifferenceEngine-&gt;generateTextDiffBody()<br />
#11 /var/www/techotopia/includes/diff/DifferenceEngine.php(728): DifferenceEngine-&gt;generateContentDiffBody()<br />
#12 /var/www/techotopia/includes/diff/DifferenceEngine.php(662): DifferenceEngine-&gt;getDiffBody()<br />
#13 /var/www/techotopia/includes/FeedUtils.php(155): DifferenceEngine-&gt;getDiff()<br />
#14 /var/www/techotopia/includes/actions/HistoryAction.php(325): FeedUtils::formatDiffRow()<br />
#15 /var/www/techotopia/includes/actions/HistoryAction.php(290): HistoryAction-&gt;feedItem()<br />
#16 /var/www/techotopia/includes/actions/HistoryAction.php(130): HistoryAction-&gt;feed()<br />
#17 /var/www/techotopia/includes/actions/FormlessAction.php(43): HistoryAction-&gt;onView()<br />
#18 /var/www/techotopia/includes/MediaWiki.php(490): FormlessAction-&gt;show()<br />
#19 /var/www/techotopia/includes/MediaWiki.php(287): MediaWiki-&gt;performAction()<br />
#20 /var/www/techotopia/includes/MediaWiki.php(714): MediaWiki-&gt;performRequest()<br />
#21 /var/www/techotopia/includes/MediaWiki.php(508): MediaWiki-&gt;main()<br />
#22 /var/www/techotopia/index.php(41): MediaWiki-&gt;run()<br />
#23 {main}<br />

