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	<title>过滤nil - 四号程序员</title>
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		<title>Swift的Array如何过滤数组中的nil数据 - 用flatMap</title>
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		<pubDate>Tue, 07 Mar 2017 09:10:24 +0000</pubDate>
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		<category><![CDATA[过滤nil]]></category>
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					<description><![CDATA[As of Swift 2.0, you don't need to write your own extension to filter nil values from an Array, you can use flatMap, which flattens the Array and filters nils: let optionals : [String?] = ["a", "b", nil, "d"] let nonOptionals = optionals.flatMap{$0[......] 继续阅读]]></description>
		
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