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	<title>C Archives - Richard Warrender</title>
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	<description>Creative Thinking, Clear Engineering</description>
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		<title>5 essential tips for using blocks effectively</title>
		<link>https://richardwarrender.com/2016/12/5-essential-tips-for-using-blocks/</link>
					<comments>https://richardwarrender.com/2016/12/5-essential-tips-for-using-blocks/#respond</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Sat, 31 Dec 2016 17:43:53 +0000</pubDate>
				<category><![CDATA[GCD]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[apple]]></category>
		<category><![CDATA[blocks]]></category>
		<category><![CDATA[C]]></category>
		<category><![CDATA[gcd]]></category>
		<category><![CDATA[iOS]]></category>
		<category><![CDATA[Mac OS X]]></category>
		<category><![CDATA[Objective-C]]></category>
		<guid isPermaLink="false">https://richardwarrender.com/?p=1025</guid>

					<description><![CDATA[Objective-C Blocks are very powerful but often under-used or badly abused! Continuing on from my previous post on how to declare a block, here is a quick-fire list of 5 experience-earned tips that every developer should know. 1. typedef a block If you find yourself using a particular block syntax a lot or perhaps you [&#8230;]]]></description>
		
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			<slash:comments>0</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">1025</post-id>	</item>
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		<title>How to declare a block</title>
		<link>https://richardwarrender.com/2016/10/how-to-declare-block/</link>
					<comments>https://richardwarrender.com/2016/10/how-to-declare-block/#respond</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Mon, 10 Oct 2016 11:30:08 +0000</pubDate>
				<category><![CDATA[GCD]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[apple]]></category>
		<category><![CDATA[blocks]]></category>
		<category><![CDATA[C]]></category>
		<category><![CDATA[gcd]]></category>
		<category><![CDATA[iOS]]></category>
		<category><![CDATA[Mac OS X]]></category>
		<category><![CDATA[Objective-C]]></category>
		<guid isPermaLink="false">https://richardwarrender.com/?p=1020</guid>

					<description><![CDATA[Are you really sure on how to declare a block? How about all 4 variations? On iOS and macOS, it can be easy to forget Objective-C block syntax as it isn&#8217;t the most intuitive, especially now Swift is becoming the main language of new projects. Remembering the syntax is actually just a short click away [&#8230;]]]></description>
		
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			<slash:comments>0</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">1020</post-id>	</item>
		<item>
		<title>Encrypt data using AES and 256-bit keys</title>
		<link>https://richardwarrender.com/2016/04/encrypt-data-using-aes-and-256-bit-keys/</link>
					<comments>https://richardwarrender.com/2016/04/encrypt-data-using-aes-and-256-bit-keys/#comments</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Wed, 27 Apr 2016 19:06:29 +0000</pubDate>
				<category><![CDATA[Encryption]]></category>
		<category><![CDATA[Objective-C]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[AES]]></category>
		<category><![CDATA[AES-256]]></category>
		<category><![CDATA[C]]></category>
		<category><![CDATA[CommonCrypto]]></category>
		<category><![CDATA[encryption]]></category>
		<category><![CDATA[iOS]]></category>
		<category><![CDATA[Mac OS X]]></category>
		<category><![CDATA[openssl]]></category>
		<category><![CDATA[programming]]></category>
		<guid isPermaLink="false">https://richardwarrender.com/?p=936</guid>

					<description><![CDATA[AES stands for Advanced Encryption Standard and is an industry-standard algorithm for encrypting data symmetrically which even the US government has approved for SECRET documents. If you don&#8217;t know what symmetrical encryption is, it means that you use the same key or password to encrypt the data as you do to unencrypt it. So you [&#8230;]]]></description>
		
					<wfw:commentRss>https://richardwarrender.com/2016/04/encrypt-data-using-aes-and-256-bit-keys/feed/</wfw:commentRss>
			<slash:comments>14</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">936</post-id>	</item>
		<item>
		<title>Quick way of cleaning HTML for iOS apps</title>
		<link>https://richardwarrender.com/2016/04/quick-way-of-cleaning-html-ios/</link>
					<comments>https://richardwarrender.com/2016/04/quick-way-of-cleaning-html-ios/#respond</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Tue, 05 Apr 2016 19:59:15 +0000</pubDate>
				<category><![CDATA[Objective-C]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[C]]></category>
		<category><![CDATA[Cocoa]]></category>
		<category><![CDATA[Cocoa Touch]]></category>
		<category><![CDATA[DOM]]></category>
		<category><![CDATA[HTML]]></category>
		<category><![CDATA[programming]]></category>
		<category><![CDATA[web]]></category>
		<guid isPermaLink="false">https://richardwarrender.com/?p=918</guid>

					<description><![CDATA[For some reason HTML is always dirty, it&#8217;s usually full of Analytics tags, JavaScript or contains nested HTML tags. This is usually fine for displaying in browsers but at some point an iOS app will need to display HTML content and usually when it does, you need it to display clean HTML or only a [&#8230;]]]></description>
		
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			<slash:comments>0</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">918</post-id>	</item>
		<item>
		<title>How to build a Ghostbuster Proton Pack</title>
		<link>https://richardwarrender.com/2016/02/how-to-build-a-ghostbuster-proton-pack/</link>
					<comments>https://richardwarrender.com/2016/02/how-to-build-a-ghostbuster-proton-pack/#respond</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Wed, 10 Feb 2016 18:51:06 +0000</pubDate>
				<category><![CDATA[Hardware]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[arduino]]></category>
		<category><![CDATA[C]]></category>
		<category><![CDATA[electronics]]></category>
		<category><![CDATA[led]]></category>
		<category><![CDATA[programming]]></category>
		<guid isPermaLink="false">https://richardwarrender.com/?p=863</guid>

					<description><![CDATA[I built a Ghostbuster proton pack for a fancy dress party recently. It took about 3 or 4 evenings to build and involved Arduinos, lots of hot glue and over 92 LEDs! This is the build log.]]></description>
		
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			<slash:comments>0</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">863</post-id>	</item>
		<item>
		<title>How to call a block after a delay</title>
		<link>https://richardwarrender.com/2012/02/how-to-call-block-after-delay/</link>
					<comments>https://richardwarrender.com/2012/02/how-to-call-block-after-delay/#comments</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Wed, 22 Feb 2012 22:00:46 +0000</pubDate>
				<category><![CDATA[GCD]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[apple]]></category>
		<category><![CDATA[blocks]]></category>
		<category><![CDATA[C]]></category>
		<category><![CDATA[gcd]]></category>
		<category><![CDATA[ipad]]></category>
		<category><![CDATA[iphone]]></category>
		<category><![CDATA[Objective-C]]></category>
		<category><![CDATA[osx]]></category>
		<guid isPermaLink="false">http://richardwarrender.com/?p=412</guid>

					<description><![CDATA[On iOS and on OS X you sometimes need the User Interface to update after a short delay. The old way of doing it was calling the performSelector:withObject:afterDelay: selector on any NSObject subclass but that requires defining a new method in your class and you can only pass one object as a parameter. Instead, you [&#8230;]]]></description>
		
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			<slash:comments>5</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">412</post-id>	</item>
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