大约有 1,200 项符合查询结果(耗时:0.0083秒) [XML]

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支撑Github的开源技术 - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...e),Showcase根据项目属性来组织、定义一系列的开源项目列表,可以更清晰的发现你所需要 Github在3月19号开放了新的项目展示页面(Showcase),Showcase根据项目属性来组织、定义一系列的开源项目列表,可以更清晰的发现你所...
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Most underused data visualization [closed]

... <- Sys.Date() quote <- paste("http://ichart.finance.yahoo.com/table.csv?s=", stock, "&a=", substr(start.date,6,7), "&b=", substr(start.date, 9, 10), "&c=", substr(start.date, 1,4), "&d=", substr(end.date,6,7), ...
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php implode (101) with quotes

..._map(): function add_quotes($str) { return sprintf("'%s'", $str); } $csv = implode(',', array_map('add_quotes', $array)); DEMO Also note that there is fputcsv if you want to write to a file. share | ...
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开源邮件传输代理软件 -- Postfix 介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...fix会在内存中保存一个有长度限制的当前不可到达的地址列表。这样就避免了对那些目的地为当前不可到达地址的邮件的投递尝试。从而大大提高了系统的性能。 1.5、postfix的安全性 postfix通过一系列的措施来提高系统的安...
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test a file upload using rspec - rails

...e = Rack::Test::UploadedFile.new(Rails.root.join('spec/fixtures/files/test.csv'), 'text/csv') – Mike Blyth Sep 3 '12 at 10:04 ...
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AsyncProcedures异步过程扩展 · App Inventor 2 中文网

...库或文件加载大量数据 图像处理: 批量处理图像文件 列表操作: 对长列表进行遍历和处理 API调用: 多个API请求的异步处理 基本用法 异步执行过程 使用AsyncProcedures扩展执行异步过程的基...
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Converting from IEnumerable to List [duplicate]

...example: IEnumerable<string> stringEnumerable = null; StringBuilder csv = new StringBuilder(); stringEnumerable.ToNonNullList().ForEach(str=> csv.Append(str).Append(",")); Here is the extension method: public static List<T> ToNonNullList<T>(this IEnumerable<T> obj) { ...
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App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网

...一点例外:订阅和取消订阅只能指定单个主题,而不能是列表。App Inventor 无法很好地处理此类列表)。 此版本的 MQTT 客户端基于 Eclipse Paho Java 客户端。它与以前的版本不兼容,但允许使用 SSL/TLS 连接以满足更高的安全...
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What is the difference between map and flatMap and a good use case for each?

... where is the number of elements of input and output are the same. number.csv 1 2 3 - 4 - 5 map.py adds all numbers in add.csv. from operator import * def f(row): try: return float(row) except Exception: return 0 rdd = sc.textFile('a.csv').map(f) print(rdd.count()) # 7 print...
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Best/Most Comprehensive API for Stocks/Financial Data [closed]

... Yahoo's api provides a CSV dump: Example: http://finance.yahoo.com/d/quotes.csv?s=msft&f=price I'm not sure if it is documented or not, but this code sample should showcase all of the features (namely the stat types [parameter f in the query ...