From: nahi <nakahiro@...> Date: 2012-03-18T17:22:47+09:00 Subject: [ruby-core:43410] [ruby-trunk - Feature #3450] Format Strings with Named Arguments & Hash#default Issue #3450 has been updated by nahi. Description updated Assignee set to nobu ---------------------------------------- Feature #3450: Format Strings with Named Arguments & Hash#default https://bugs.ruby-lang.org/issues/3450#change-24726 Author: runpaint Status: Open Priority: Low Assignee: nobu Category: core Target version: 2.0.0 =begin Is it intentional that the, undocumented, feature #442 (named arguments in format strings) ignores the Hash's default value? >> hash = {greeting: 'Hello'}.tap{|h| h.default = 'World'} >> '%{greeting}, %{greeted}' % hash #=> KeyError: key{greeted} not found It's quite common for templates to use default values. In interface localisation, untranslated strings may need to be substituted for the equivalent in the native language, or replaced with a generic string in the target language. When building reports with format strings, a default value of an empty string allows unexpanded format sequences to be non-fatal. In both cases, a default proc would provide even further flexibility. Another perspective is that this behavior unnecessarily breaks the abstraction that default values are just like any other. =end -- http://bugs.ruby-lang.org/