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	<title>计算 - 四号程序员</title>
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		<title>Linux如何计算到某天还剩余多少秒</title>
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		<pubDate>Tue, 14 Nov 2023 13:22:59 +0000</pubDate>
				<category><![CDATA[Linux]]></category>
		<category><![CDATA[bc]]></category>
		<category><![CDATA[剩余]]></category>
		<category><![CDATA[某天]]></category>
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					<description><![CDATA[echo $(date -d '2023-11-15' +%s) - $(date +%s) &#124; bc &#160;[......] 继续阅读]]></description>
		
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		<title>WordCount的一个变种版本...Hadoop</title>
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		<pubDate>Fri, 20 Jan 2012 14:15:02 +0000</pubDate>
				<category><![CDATA[大数据技术]]></category>
		<category><![CDATA[Hadoop]]></category>
		<category><![CDATA[MapReduce]]></category>
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		<category><![CDATA[计算]]></category>
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					<description><![CDATA[本来是要用Hadoop给柯西搜索写一下锚文本聚集。但是发现上个版本的爬虫居然没有存锚文本，实在无聊，写了个统计域名（实际是host）的计数器。 输入：一行一个url 流程：提取url的domain，对domain计数+1 输出：域名，域名计数 这次完全用新的API写的。 代码如下： Mapper package com.keseek.hadoop; import java.io.IOException; import java.net.URI; imp[......] 继续阅读]]></description>
		
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