diff options
Diffstat (limited to 'railties/guides')
| -rw-r--r-- | railties/guides/source/active_support_core_extensions.textile | 98 | ||||
| -rw-r--r-- | railties/guides/source/command_line.textile | 14 |
2 files changed, 7 insertions, 105 deletions
diff --git a/railties/guides/source/active_support_core_extensions.textile b/railties/guides/source/active_support_core_extensions.textile index 6646e9cd05..cf9185a324 100644 --- a/railties/guides/source/active_support_core_extensions.textile +++ b/railties/guides/source/active_support_core_extensions.textile @@ -177,19 +177,6 @@ end NOTE: Defined in +active_support/core_ext/object/try.rb+. -h4. +singleton_class+ - -The method +singleton_class+ returns the singleton class of the receiver: - -<ruby> -String.singleton_class # => #<Class:String> -String.new.singleton_class # => #<Class:#<String:0x17a1d1c>> -</ruby> - -WARNING: Fixnums and symbols have no singleton classes, +singleton_class+ raises +TypeError+ on them. Moreover, the singleton classes of +nil+, +true+, and +false+, are +NilClass+, +TrueClass+, and +FalseClass+, respectively. - -NOTE: Defined in +active_support/core_ext/kernel/singleton_class.rb+. - h4. +class_eval(*args, &block)+ You can evaluate code in the context of any object's singleton class using +class_eval+: @@ -1851,43 +1838,6 @@ NOTE: Defined in +active_support/core_ext/string/inflections.rb+. h4(#string-conversions). Conversions -h5. +ord+ - -Ruby 1.9 defines +ord+ to be the codepoint of the first character of the receiver. Active Support backports +ord+ for single-byte encodings like ASCII or ISO-8859-1 in Ruby 1.8: - -<ruby> -"a".ord # => 97 -"à".ord # => 224, in ISO-8859-1 -</ruby> - -In Ruby 1.8 +ord+ doesn't work in general in UTF8 strings, use the multibyte support in Active Support for that: - -<ruby> -"a".mb_chars.ord # => 97 -"à".mb_chars.ord # => 224, in UTF8 -</ruby> - -Note that the 224 is different in both examples. In ISO-8859-1 "à" is represented as a single byte, 224. Its single-character representation in UTF8 has two bytes, namely 195 and 160, but its Unicode codepoint is 224. If we call +ord+ on the UTF8 string "à" the return value will be 195 in Ruby 1.8. That is not an error, because UTF8 is unsupported, the call itself would be bogus. - -INFO: +ord+ is equivalent to +getbyte(0)+. - -NOTE: Defined in +active_support/core_ext/string/conversions.rb+. - -h5. +getbyte+ - -Active Support backports +getbyte+ from Ruby 1.9: - -<ruby> -"foo".getbyte(0) # => 102, same as "foo".ord -"foo".getbyte(1) # => 111 -"foo".getbyte(9) # => nil -"foo".getbyte(-1) # => 111 -</ruby> - -INFO: +getbyte+ is equivalent to +[]+. - -NOTE: Defined in +active_support/core_ext/string/conversions.rb+. - h5. +to_date+, +to_time+, +to_datetime+ The methods +to_date+, +to_time+, and +to_datetime+ are basically convenience wrappers around +Date._parse+: @@ -1974,38 +1924,12 @@ The method +ordinalize+ returns the ordinal string corresponding to the receiver NOTE: Defined in +active_support/core_ext/integer/inflections.rb+. -h3. Extensions to +Float+ - -h4. +round+ - -The built-in method +Float#round+ rounds a float to the nearest integer. In Ruby 1.9 this method takes an optional argument to let you specify a precision. Active Support adds that functionality to +round+ in previous versions of Ruby: - -<ruby> -Math::E.round(4) # => 2.7183 -</ruby> - -NOTE: Defined in +active_support/core_ext/float/rounding.rb+. - h3. Extensions to +BigDecimal+ ... h3. Extensions to +Enumerable+ -h4. +group_by+ - -Active Support redefines +group_by+ in Ruby 1.8.7 so that it returns an ordered hash as in 1.9: - -<ruby> -entries_by_surname_initial = address_book.group_by do |entry| - entry.surname.at(0).upcase -end -</ruby> - -Distinct block return values are added to the hash as they come, so that's the resulting order. - -NOTE: Defined in +active_support/core_ext/enumerable.rb+. - h4. +sum+ The method +sum+ adds the elements of an enumerable: @@ -2160,20 +2084,6 @@ The methods +second+, +third+, +fourth+, and +fifth+ return the corresponding el NOTE: Defined in +active_support/core_ext/array/access.rb+. -h4. Random Access - -Active Support backports +sample+ from Ruby 1.9: - -<ruby> -shape_type = [Circle, Square, Triangle].sample -# => Square, for example - -shape_types = [Circle, Square, Triangle].sample(2) -# => [Triangle, Circle], for example -</ruby> - -NOTE: Defined in +active_support/core_ext/array/random_access.rb+. - h4. Adding Elements h5. +prepend+ @@ -2926,14 +2836,6 @@ WARNING: The original +Range#include?+ is still the one aliased to +Range#===+. NOTE: Defined in +active_support/core_ext/range/include_range.rb+. -h4. +cover?+ - -Ruby 1.9 provides +cover?+, and Active Support defines it for previous versions as an alias for +include?+. - -The method +include?+ in Ruby 1.9 is different from the one in 1.8 for non-numeric ranges: instead of being based on comparisons between the value and the range's endpoints, it walks the range with +succ+ looking for value. This works better for ranges with holes, but it has different complexity and may not finish in some other cases. - -In Ruby 1.9 the old behavior is still available in the new +cover?+, which Active Support backports for forward compatibility. For example, Rails uses +cover?+ for ranges in +validates_inclusion_of+. - h4. +overlaps?+ The method +Range#overlaps?+ says whether any two given ranges have non-void intersection: diff --git a/railties/guides/source/command_line.textile b/railties/guides/source/command_line.textile index 58855bc80b..fa783edc58 100644 --- a/railties/guides/source/command_line.textile +++ b/railties/guides/source/command_line.textile @@ -381,16 +381,16 @@ h4. +about+ <shell> $ rake about About your application's environment -Ruby version 1.8.7 (x86_64-linux) +Ruby version 1.9.3 (x86_64-linux) RubyGems version 1.3.6 Rack version 1.3 -Rails version 3.2.0.beta +Rails version 4.0.0.beta JavaScript Runtime Node.js (V8) -Active Record version 3.2.0.beta -Action Pack version 3.2.0.beta -Active Resource version 3.2.0.beta -Action Mailer version 3.2.0.beta -Active Support version 3.2.0.beta +Active Record version 4.0.0.beta +Action Pack version 4.0.0.beta +Active Resource version 4.0.0.beta +Action Mailer version 4.0.0.beta +Active Support version 4.0.0.beta Middleware ActionDispatch::Static, Rack::Lock, Rack::Runtime, Rack::MethodOverride, ActionDispatch::RequestId, Rails::Rack::Logger, ActionDispatch::ShowExceptions, ActionDispatch::DebugExceptions, ActionDispatch::RemoteIp, ActionDispatch::Reloader, ActionDispatch::Callbacks, ActiveRecord::ConnectionAdapters::ConnectionManagement, ActiveRecord::QueryCache, ActionDispatch::Cookies, ActionDispatch::Session::CookieStore, ActionDispatch::Flash, ActionDispatch::ParamsParser, ActionDispatch::Head, Rack::ConditionalGet, Rack::ETag, ActionDispatch::BestStandardsSupport Application root /home/foobar/commandsapp Environment development |