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In Java, are enum types inside a class static?
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What does the forward slash mean in the CSS font shorthand?
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Object initialization syntax
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form_for but to post to a different action
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Heroku “psql: FATAL: remaining connection slots are reserved for non-replication superuser connectio
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Why is using the rails default_scope often recommend against?
...u have to 'overwrite' or 'undo' the effect of default_scope. After a quick google, you'll likely find out about unscoped. See what happens next:
2.1.1 :002 > User.first.posts.unscoped
Post Load (0.2ms) SELECT "posts".* FROM "posts"
=> Unscoped removes ALL scopes that might normally appl...
社会化海量数据采集爬虫框架搭建 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...取，他的好处可以支持规整网页数据抓取。我们使用的是google插件 XPath Helper，这个玩意可以支持在网页点击元素生成xpath，就省去了自己去查找xpath的功夫，也便于未来做到所点即所得的功能。正则表达式补充xpath抓取不到的数...
Oracle SELECT TOP 10 records
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What is the difference between Raising Exceptions vs Throwing Exceptions in Ruby?
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Detail change after Git pull
...web, for example:
The Pro Git book
Git Magic
and the 4.5 million hits on Google for "Git tutorial"
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