传入函数要理解“函数本身也可以作为参数传入”,可以从Python内建的map/reduce函数入手。如果你读过Google的那篇大名鼎鼎的论文“MapReduce: Simplified Data Processing on Large Clusters”,你就能大概明白map/reduce的概念。...
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编程语言 时间:
2014-09-28 01:51:30
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223
As mentioned in the introduction Sun now provides these tools for XML Processing in Java:StAX Reader / WriterSAX ParserDOM ParserXPath EvaluatorXSL Pr...
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编程语言 时间:
2014-09-26 04:51:28
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339
voidsetup(){size(1000,600,P3D);noFill();smooth();}voiddraw(){background(0);translate(width/2,height/2,-(width/2));rotateY(map(mouseX,0,width,-PI,PI));stroke(100);box(350);rotateX(map(mouseY,0,height,-PI,PI));stroke(150);box(200);}
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其他好文 时间:
2014-09-26 00:20:38
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170
数字图像处理发展概况数字图像处理发展概况数字图像处理(Digital Image Processing)又称为计算机图像处理,它是指将图像信号转换成数字信号并利用计算机对其进行处理的过程。数字图像处理最早出现于20世纪50年代,当时的电子计算机已经发展到一定水平,人们開始利用计算机来处理图形和图像信...
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其他好文 时间:
2014-09-25 22:27:27
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239
今天升级一个spring项目遇到如下错:HTTP Status 500 - Request processing failed; nested exception is org.apache.tiles.definition.DefinitionsFactoryException: I/O Erro...
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编程语言 时间:
2014-09-25 21:23:17
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1032
HTTP Status 500 - Handler processing failed; nested exception is java.lang.OutOfMemoryError: PermGen space发生此问题的环境信息:系统:CentOS 6.5Tomcat:Tomcat 7.0.6PermGen spacePermGen space的全称是Permanent Generation ...
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编程语言 时间:
2014-09-25 20:55:07
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240
start:Jobfailedtostartinvoke-rc.d:initscriptmysql,action"start"failed.dpkg:errorprocessingmysql-server-5.5(--configure):subprocessinstalledpost-instal...
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数据库 时间:
2014-09-25 13:59:39
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219
what is big data? what to do about it?1.the challenge: big datawhen needs for data collection, processing, management and analysis go beyond the capac...
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其他好文 时间:
2014-09-24 12:10:36
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299
A data processing system includes a global promotion facility and a plurality of processors coupled by an interconnect. In response to execution of an...
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移动开发 时间:
2014-09-23 22:51:25
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368
A pending tag system and method to maintain data coherence in a processing node during pending transactions in a transaction pipeline. A pending tag s...
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其他好文 时间:
2014-09-22 18:41:03
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232