diff options
Diffstat (limited to 'guides/source/active_support_core_extensions.textile')
| -rw-r--r-- | guides/source/active_support_core_extensions.textile | 30 |
1 files changed, 2 insertions, 28 deletions
diff --git a/guides/source/active_support_core_extensions.textile b/guides/source/active_support_core_extensions.textile index 8045316e98..6443255f5d 100644 --- a/guides/source/active_support_core_extensions.textile +++ b/guides/source/active_support_core_extensions.textile @@ -1277,20 +1277,6 @@ The <tt>inquiry</tt> method converts a string into a +StringInquirer+ object mak "active".inquiry.inactive? # => false </ruby> -h4. Key-based Interpolation - -In Ruby 1.9 the <tt>%</tt> string operator supports key-based interpolation, both formatted and unformatted: - -<ruby> -"Total is %<total>.02f" % {:total => 43.1} # => Total is 43.10 -"I say %{foo}" % {:foo => "wadus"} # => "I say wadus" -"I say %{woo}" % {:foo => "wadus"} # => KeyError -</ruby> - -Active Support adds that functionality to <tt>%</tt> in previous versions of Ruby. - -NOTE: Defined in +active_support/core_ext/string/interpolation.rb+. - h4. +starts_with?+ and +ends_with?+ Active Support defines 3rd person aliases of +String#start_with?+ and +String#end_with?+: @@ -1337,7 +1323,7 @@ Returns the character of the string at position +position+: "hello".at(0) # => "h" "hello".at(4) # => "o" "hello".at(-1) # => "o" -"hello".at(10) # => ERROR if < 1.9, nil in 1.9 +"hello".at(10) # => nil </ruby> NOTE: Defined in +active_support/core_ext/string/access.rb+. @@ -1819,7 +1805,7 @@ NOTE: Defined in +active_support/core_ext/numeric/bytes.rb+. h4. Time -Enables the use of time calculations and declarations, like 45.minutes + 2.hours + 4.years. +Enables the use of time calculations and declarations, like @45.minutes <plus> 2.hours <plus> 4.years@. These methods use Time#advance for precise date calculations when using from_now, ago, etc. as well as adding or subtracting their results from a Time object. For example: @@ -2767,18 +2753,6 @@ As the example depicts, the +:db+ format generates a +BETWEEN+ SQL clause. That NOTE: Defined in +active_support/core_ext/range/conversions.rb+. -h4. +step+ - -Active Support extends the method +Range#step+ so that it can be invoked without a block: - -<ruby> -(1..10).step(2) # => [1, 3, 5, 7, 9] -</ruby> - -As the example shows, in that case the method returns an array with the corresponding elements. - -NOTE: Defined in +active_support/core_ext/range/blockless_step.rb+. - h4. +include?+ The methods +Range#include?+ and +Range#===+ say whether some value falls between the ends of a given instance: |