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Best way to create custom config options for my Rails app?

...er in config/initializers: # Rails 2 APP_CONFIG = YAML.load_file("#{RAILS_ROOT}/config/config.yml")[RAILS_ENV] # Rails 3+ APP_CONFIG = YAML.load_file(Rails.root.join('config/config.yml'))[Rails.env] If you're using Rails 3, ensure you don't accidentally add a leading slash to your relative confi...
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Groovy Shell warning “Could not open/create prefs root node …”

...JDK source code for WindowsPreferences.java. In this class, both nodes userRoot and systemRoot were declared static as in: /** * User root node. */ static final Preferences userRoot = new WindowsPreferences(USER_ROOT_NATIVE_HANDLE, WINDOWS_ROOT_PATH); /** * System root node. */ static fin...
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Remove unnecessary svn:mergeinfo properties

...another way to delete all sub tree svn:mergeinfo properties but not at the root folder (this is needed for branching to work properly). From the root of the project do: svn propdel svn:mergeinfo -R svn revert . svn ci -m "Removed mergeinfo" ...
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Should I use != or for not equal in T-SQL?

...ages) and <> (ANSI). Databases that support both != and <>: MySQL 5.1: != and <> PostgreSQL 8.3: != and <> SQLite: != and <> Oracle 10g: != and <> Microsoft SQL Server 2000/2005/2008/2012/2016: != and <> IBM Informix Dynamic Server 10: != and <> Int...
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Laravel - Eloquent or Fluent random row

...vel 3: User::order_by(DB::raw('RAND()'))->get(); Check this article on MySQL random rows. Laravel 5.2 supports this, for older version, there is no better solution then using RAW Queries. edit 1: As mentioned by Double Gras, orderBy() doesn't allow anything else then ASC or DESC since this chang...
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Fastest way to determine if an integer's square root is an integer

...st way to determine if a long value is a perfect square (i.e. its square root is another integer): 35 Answers ...
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Reset AutoIncrement in SQL Server after Delete

... If you're using MySQL, try this: ALTER TABLE tablename AUTO_INCREMENT = 1 share | improve this answer | follow ...
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Linux的诞生和发展 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...自己的操作系统,到最初Linux 内核0.01 版公布,以及从此如何艰难地一步一个脚印地在全世界hacker 的帮助下最后推出比较完善的1.0 版本这段时间的发展经过,也即对Linux 的早期发展历史进行详细介绍。   对于Linux的一般发...
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Javascript objects: get parent [duplicate]

...t the same problem. I have a structure like this: var structure = { "root":{ "name":"Main Level", nodes:{ "node1":{ "name":"Node 1" }, "node2":{ "name":"Node 2" }, "node3":{ ...
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How to select rows that have current day's timestamp?

... the `` are important because timestamp (and date as in my case) is a MySQL reserved word – Victor Ferreira Jan 10 '15 at 19:39 ...