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| -rw-r--r-- | railties/guides/source/active_support_overview.textile | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/railties/guides/source/active_support_overview.textile b/railties/guides/source/active_support_overview.textile index 5e6c2030c6..06d750afc9 100644 --- a/railties/guides/source/active_support_overview.textile +++ b/railties/guides/source/active_support_overview.textile @@ -692,6 +692,19 @@ The method +String#squish+ strips leading and trailing whitespace, and substitut There's also the destructive version +String#squish!+. +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. + + h3. Extensions to +Numeric+ ... |