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Difference between database and schema
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– Yevgraf Andreyevich Zhivago
Dec 25 '14 at 19:49
Is the logic same for AWS Redshift? Anyone? I am confused between the t...
Removing a model in rails (reverse of “rails g model Title…”)
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bundle exec rake db:rollback
rails destroy model <model_name>
When you generate a mo...
How can I disable the UITableView selection?
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Minimum and maximum date
...e values leap seconds are ignored. It is assumed that there are exactly 86,400,000 milliseconds per day. ECMAScript Number values can represent all integers from –9,007,199,254,740,992 to 9,007,199,254,740,992; this range suffices to measure times to millisecond precision for any instant that is w...
Is there a method to generate a UUID with go language
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u[8] = (u[8] | 0x80) & 0xBF // what's the purpose ?
u[6] = (u[6] | 0x40) & 0x4F // what's the purpose ?
These lines clamp the values of byte 6 and 8 to a specific range. rand.Read returns random bytes in the range 0-255, which are not all valid values for a UUID. As far as I can tell, th...
postgresql - add boolean column to table set default
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edited Oct 24 '18 at 18:28
answered Aug 13 '12 at 16:54
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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
...前的量级和未来的增长，2天大概在2000w — 5000w 中间。
4、短文本和长文本都要去重，经过测试长文本使用simhash效果很好，短文本使用simhash 准备度不高。
目前我们估算一下存储空间的大小，就以JAVA 来说，存储一个simhash 需...
Where to host an Open Source Project: CodePlex, Google Code, SourceForge? [closed]
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