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MongoDB sort排序、index索引教程 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...db的是B-tree的索引了。要注意的是,一个collection不能超过64个索引,索引的大小不能超过1024字节,其中包括字段名和值和命名空间。 首先创建数据: db.Indexing.insert( { name : "Denis", age : 20 } ) db.Indexing.insert( { name : "Abe", age : ...
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Difference between size_t and unsigned int?

... size_t type is a base unsigned integer type of C/C++ language. It is the type of the result returned by sizeof operator. The type's size is chosen so that it could store the maximum size of a theoretically possible array of any type. On a 32-...
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Random number generator only generating one random number

... @Florin - there is no difference re "stack based" between the two. Static fields are just as much "external state", and will absolutely be shared between callers. With instances, there is a good chance that different threads have different instances (a common pattern)...
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How to Create Grid/Tile View?

...sonry layout. Alternatively, you can use CSS3 columns. But for now jQuery based plugin is the best choice since there is compatibility issue with CSS3 column. share | improve this answer |...
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Git for Windows - The Program can't start because libiconv2.dll is missing

...ertain commands (like git push, for example) from a git Bash on Windows 7 (64bit) I get the error: 25 Answers ...
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Adding a Google Plus (one or share) link to an email newsletter

...m will allow you to share example.com on Google+: (yes, that is a working demo). Check out the official docs for more info. If you use this approach please be aware of the fact that it is not a direct replacement for the +1 button. The link shares the target URL on Google+, but it does not actual...
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How do I compile a Visual Studio project from the command-line?

...not require a registration after 30 days of using them like the "free" GUI-based Visual Studio Community edition does. With the Microsoft registration requirement in place, that version is hardly free. Free-as-in-facebook if anything... ...
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Maximum length for MySQL type text

...a textarea appropriate to the max length of a text field in my MySQL database table. How many characters can a type text field store? ...
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How to become an OpenCart guru? [closed]

...guage->load method Understanding controllers Controllers are loaded based on the route and are fairly straight forward to understand. Controllers are located in the /catalog/controller/ folder. Continuing from the last example, the Controller for the Search page is in /product/search.php with...
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Is there a good jQuery Drag-and-drop file upload plugin? [closed]

... Have a look at this one: http://aquantum-demo.appspot.com/file-upload It also handles multiple file upload! share | improve this answer | f...