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How to select a single field for all documents in a MongoDB collection?

In my MongoDB, I have a student collection with 10 records having fields name and roll . One record of this collection is: ...
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刘强东“一元年薪”背后的O2O棋局 - 资讯 - 清泛网 - 专注C/C++及内核技术

...今年5月份批准了针对公司董事长兼CEO刘强东的一项为期10年的薪酬计划。计划规定,10年内,刘强东每年只能领到1元现金形式底薪和零元现金形式奖金。 难道刘强东就因此连杯奶茶也买不起了吗?这么想就太天真了。 根据京...
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Logstash实践: 分布式系统的日志监控 - 更多技术 - 清泛网 - 专注C/C++及内核技术

... # stdout { } # 输出到redis redis { host => "10.140.45.190" # redis主机地址 port => 6379 # redis端口号 db => 8 # redis数据库编号 data_type => "channel" # 使用发布/订阅模式 key => ...
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Get TFS to ignore my packages folder

... | edited Oct 10 '16 at 15:50 answered Mar 6 '15 at 17:44 ...
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How to paste in a new line with vim?

... DrAlDrAl 61.7k1010 gold badges9595 silver badges101101 bronze badges ...
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Team Build Error: The Path … is already mapped to workspace

... AMissico 20.5k66 gold badges6969 silver badges105105 bronze badges answered Oct 22 '08 at 15:30 NotMyselfNotMyself 25.4k1616...
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How to redirect to previous page in Ruby On Rails?

... answered Jan 26 '10 at 14:41 Jaime BellmyerJaime Bellmyer 22k77 gold badges4848 silver badges4646 bronze badges ...
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What is the $? (dollar question mark) variable in shell scripting? [duplicate]

... | edited Jun 29 '17 at 10:35 Melvyn 6,09011 gold badge1919 silver badges3535 bronze badges answered J...
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Is there a valid reason for enforcing a maximum width of 80 characters in a code file, this day and

... 10 @steffenj: Actually, books tend to shoot for about 66 characters per line (although this varies somewhat depending on other parameters) be...
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Connecting to remote URL which requires authentication using Java

... 10 I've been looking for a Base64 encoder inside java standard packages for so long ! Thank you – qwertzguy ...