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"a sql" -> "an SQL" per API documentation guidelines
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@ -118,7 +118,7 @@ module ActiveRecord
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# Person.all.map(&:name)
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# Person.all.map(&:name)
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#
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#
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# Pluck returns an <tt>Array</tt> of attribute values type-casted to match
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# Pluck returns an <tt>Array</tt> of attribute values type-casted to match
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# the plucked column name, if it can be deduced. Plucking a SQL fragment
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# the plucked column name, if it can be deduced. Plucking an SQL fragment
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# returns String values by default.
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# returns String values by default.
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#
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#
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# Examples:
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# Examples:
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@ -15,7 +15,7 @@ h3. Introduction to instrumentation
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The instrumentation API provided by ActiveSupport allows developers to provide hooks which other developers may hook into. There are several of these within the Rails framework, as described below in <TODO: link to section detailing each hook point>. With this API, developers can choose to be notified when certain events occur inside their application or another piece of Ruby code.
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The instrumentation API provided by ActiveSupport allows developers to provide hooks which other developers may hook into. There are several of these within the Rails framework, as described below in <TODO: link to section detailing each hook point>. With this API, developers can choose to be notified when certain events occur inside their application or another piece of Ruby code.
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For example, there is a hook provided within Active Record that is called every time Active Record uses a SQL query on a database. This hook could be *subscribed* to, and used to track the number of queries during a certain action. There's another hook around the processing of an action of a controller. This could be used, for instance, to track how long a specific action has taken.
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For example, there is a hook provided within Active Record that is called every time Active Record uses an SQL query on a database. This hook could be *subscribed* to, and used to track the number of queries during a certain action. There's another hook around the processing of an action of a controller. This could be used, for instance, to track how long a specific action has taken.
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You are even able to create your own events inside your application which you can later subscribe to.
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You are even able to create your own events inside your application which you can later subscribe to.
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