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How to implement a many-to-many relationship in PostgreSQL?
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301
The SQL DDL (data definition language) statements could look like this:
CREATE TABLE product (...
海量数据相似度计算之simhash短文本查找 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...imhash，计算量还是蛮大，普通PC 比较1000w次海明距离需要 300ms ，和5000w数据比较需要1.8 s。看起来相似度计算不是很慢，还在秒级别。给大家算一笔账就知道了：
随着业务增长需要一个小时处理100w次，一个小时为3600 *1000 = 360w毫...
How to remove all .svn directories from my application directories
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siegy22
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answered Aug 18 '09 at 15:23
GregGreg
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Nginx — static file serving confusion with root & alias
...iscussed this, not conclusively though.
https://serverfault.com/questions/376162/how-can-i-create-a-location-in-nginx-that-works-with-and-without-a-trailing-slas
https://serverfault.com/questions/375602/why-is-my-nginx-alias-not-working
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Strip html from string Ruby on Rails
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JonJon
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What is string_view?
...ring_view was a proposed feature within the C++ Library Fundamentals TS( N3921 ) added to C++17
1 Answer
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What is the Objective-C equivalent for “toString()”, for use with NSLog?
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zakovyryazakovyrya
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Difference between RegisterStartupScript and RegisterClientScriptBlock?
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163
Here's an old discussion thread where I listed the main differences and the conditions in which ...
How update the _id of one MongoDB Document?
...4d2d2a000002")})
// set a new _id on the document
doc._id = ObjectId("4c8a331bda76c559ef000004")
// insert the document, using the new _id
db.clients.insert(doc)
// remove the document with the old _id
db.clients.remove({_id: ObjectId("4cc45467c55f4d2d2a000002")})
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Is errno thread-safe?
...assignments to errno by other threads.
Also see http://linux.die.net/man/3/errno
errno is thread-local; setting it in one thread does not affect its value in any other thread.
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