Edit a few lines for readability.
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@ -20,7 +20,7 @@ Thus, after a simple require like:
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require 'active_support'
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</ruby>
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objects do not even respond to +blank?+, let's see how to load its definition.
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objects do not even respond to +blank?+. Let's see how to load its definition.
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h5. Cherry-picking a Definition
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@ -42,7 +42,7 @@ h5. Loading Grouped Core Extensions
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The next level is to simply load all extensions to +Object+. As a rule of thumb, extensions to +SomeClass+ are available in one shot by loading +active_support/core_ext/some_class+.
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Thus, if that would do, to have +blank?+ available we could just load all extensions to +Object+:
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Thus, to load all extensions to +Object+ (including +blank?+):
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<ruby>
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require 'active_support/core_ext/object'
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@ -432,7 +432,7 @@ h4. +require_library_or_gem+
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The convenience method +require_library_or_gem+ tries to load its argument with a regular +require+ first. If it fails loads +rubygems+ and tries again.
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If the first attempt is a failure and +rubygems+ can't be loaded the method raises +LoadError+. On the other hand, if +rubygems+ is available but the argument is not loadable as a gem, the method gives up and +LoadError+ is also raised.
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If the first attempt is a failure and +rubygems+ can't be loaded the method raises +LoadError+. A +LoadError+ is also raised if +rubygems+ is available but the argument is not loadable as a gem.
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For example, that's the way the MySQL adapter loads the MySQL library:
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@ -503,7 +503,7 @@ Model attributes have a reader, a writer, and a predicate. You can alias a model
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<ruby>
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class User < ActiveRecord::Base
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# let me refer to the email column as "login",
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# much meaningful for authentication code
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# possibly meaningful for authentication code
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alias_attribute :login, :email
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end
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</ruby>
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