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1. Standard Architecture to solve the problem of big data computation Cluster of commodity Linux nodes Commodity network (ethernet) to connect them 2. Issue and idea Issue: Copying data over a network takes time Idea: Bring computation close to the data Store files multiple times for reliability 3. HDFS 　　3.1 Function: Distributed File System, Provides global file namespace, Replica to ensure data recovery 　　3.2 Data Characteristics： Streaming data access Large data sets and files: gigabytes to terabytes size High aggregate data bandwidth Scale to hundreds of nodes in a cluster Tens of

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm implementing Boruvka's algorithm in C++ to find minimum spanning tree for a graph. This algorithm finds a minimum-weight edge for each supervertex (a supervertex is a connected component, it is simply a vertex in the first iteration) and adds them into the MST. Once an edge is added, we update the connected components and repeat the find-min-edge, and merge-supervertices process, until all the vertices in the graph are in one connected component. Since find-min-edge for each supervertex can be done in parallel, I want to use OpenMP to do

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I am having trouble using d3's symbol mechanism to specify a unique symbol for each set of data. The data's like this: [[{x: 1, y:1},{x: 2, y:2},{x: 3, y:3}], [{x: 1, y:1},{x: 2, y:4},{x: 3, y:9}], etc.] The part of the code that writes out the symbols looks like this: I create a series group for each vector of points. Then: series . selectAll ( "g.points" ) //this selects all <g> elements with class points (there aren't any yet) . data ( Object ) //drill down into the nested Data . enter () . append ( "g" ) //create groups then

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I am working on a really simple Html/Boostrap website. I am using the owl-carousel library to display and slide multiple paragraphs. The problem is that when displaying on small devices, these paragraphs will not have the same height, depending on how long they are. I would like all my owl-item div or paragraph to be aligned vertically within the owl-wrapper div. I tried few display combinations, and also the owl carousel's autoHeight: true option but it does not work as I except. See the pictures, the little paragraph is displayed

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: i everyone, i have a problem that has already happened to me in another case, but I present this hoping that we can solve it: The jquery (called on "rendered") works well when it is not generated by eachloop ... why not work in generated html? i click on an image generated by eachloop and nothing happens gallery.html {{# each gallery }} < div class = "superbox-list" > < img src = "images/superbox/superbox-thumb-1.jpg" data - img = "images/superbox/superbox-full-1.jpg" alt = "My first photoshop layer mask on a high end PSD template

I am trying to loop through the below shown JS object with the following code snippet, while needing to fetch both the index key as well as the inner object. How on earth should I do this, as the following doesn't work? The object: ({ prop_1:["1", "2"], prop_2:["3", "4"]}) My code: $.each(myObject, function(key,valueObj){ alert(key + "/" + valueObj.toSource() ); }); Expected output: prop_1 / (["1", "2"]) The inner object you're fetching fine, valueObj is the array, it just has no method .toSource() (at least not cross-browser anyway), if you remove that you'll get an alert: $.each(myObject,

转自： http://ftp.rpm.org/max-rpm/s1-rpm-subpack-spec-file-changes.html Spec File Changes For Subpackages The creation of subpackages is based strictly on the contents of the spec file. This doesn't mean that you'll have to learn an entirely new set of tags, conditionals, and directives in order to create subpackages. In fact, you'll only need to learn one. The primary change to a spec file is structural and starts with the definition of a preamble for each subpackage. The Subpackage's "Preamble" When we introduced RPM package building in Chapter 10 , we said that every spec file contains a

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: Due to the way my serverside script outputs I receive multiple JSON objects. {jsonhere}{jsonhere1}{jsonhere2}{jsonhere3} etc.. They aren't seperated by anything. If I would do a split based }{ I would lose those brackets. So is there an outerloop I can put over the regular $.each loop to make this work? Thank you, Ice 回答1: Rough algorithm: Define a stack Define an array LOOP on each character in the string IF the top item of the stack is a single or double quote THEN LOOP through each character until you find a matching single or

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: If I have the following data.frame, how would I go about creating a dummy variable for each year and attach it to DF so there would be additional columns year2010 and year2011. I have a fairly large dataset with many different years and I don't want to use ifelse 50 times. ddply? Thanks DF <- read.table(text=" year id var ans 2010 1 1 1 2010 2 0 0 2010 1 0 1 2010 1 0 1 2011 2 1 1 2011 2 0 1 2011 1 0 0 2011 1 0 0", header=TRUE) Desired output : year id var ans year_2010 year_2011 1 2010 1 1 1 1 0 2 2010 2 0 0 1 0 3 2010 1 0 1 1 0 4 2010 1 0 1

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Here is my connector element in server.xml. I also tried using 8443 instead of 8484 but same error. <Connector SSLEnabled="true" acceptCount="100" connectionTimeout="20000" executor="tomcatThreadPool" keystoreFile="D:/.keystore" keystorePass="changeit" maxKeepAliveRequests="15" port="8484" protocol="HTTP/1.1" redirectPort="8484" scheme="https" secure="true" allowUnsafeLegacyRenegotiation="true"/> SEVERE: Error starting endpoint java.lang.Exception: Socket bind failed: [730048] Only one usage of each socket address (protocol/network address