Class: String

Inherits:
Object
  • Object
show all
Defined in:
lib/gettext/core_ext/string.rb

Overview

Extension for String class. This feature is included in Ruby 1.9 or later but not occur TypeError.

String#% method which accept “named argument”. The translator can know the meaning of the msgids using “named argument” instead of %s/%d style.

Constant Summary collapse

PERCENT_MATCH_RE = 
Regexp.union(
    /%%/,
    /%\{(\w+)\}/,
    /%<(\w+)>(.*?\d*\.?\d*[bBdiouxXeEfgGcps])/
)

Instance Method Summary collapse

Instance Method Details

#%(args) ⇒ Object

call-seq:

%(arg)
%(hash)

Format - Uses str as a format specification, and returns the result of applying it to arg. If the format specification contains more than one substitution, then arg must be an Array containing the values to be substituted. See Kernel::sprintf for details of the format string. This is the default behavior of the String class.

  • arg: an Array or other class except Hash.

  • Returns: formatted String

(e.g.) "%s, %s" % ["Masao", "Mutoh"]

Also you can use a Hash as the “named argument”. This is recommanded way for Ruby-GetText because the translators can understand the meanings of the msgids easily.

  • hash: {:key1 => value1, :key2 => value2, … }

  • Returns: formatted String

(e.g.)
       For strings.
       "%{firstname}, %{familyname}" % {:firstname => "Masao", :familyname => "Mutoh"}

       With field type to specify format such as d(decimal), f(float),...
       "%<age>d, %<weight>.1f" % {:age => 10, :weight => 43.4}



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# File 'lib/gettext/core_ext/string.rb', line 53

def %(args)
  if args.kind_of?(Hash)
    ret = dup
    ret.gsub!(PERCENT_MATCH_RE) {|match|
      if match == '%%'
        '%'
      elsif $1
        key = $1.to_sym
        args.has_key?(key) ? args[key] : match
      elsif $2
        key = $2.to_sym
        args.has_key?(key) ? sprintf("%#{$3}", args[key]) : match
      end
    }
  else
    ret = gsub(/%([{<])/, '%%\1')
    begin
      ret._old_format_m(args)
    rescue ArgumentError => e
      if $DEBUG
        $stderr.puts "  The string:#{ret}"
        $stderr.puts "  args:#{args.inspect}"
        puts e.backtrace
      else
        raise ArgumentError, e.message
      end
    end
  end
end

#_old_format_m ⇒ Object

:nodoc:



21
 
# File 'lib/gettext/core_ext/string.rb', line 21

alias :_old_format_m :%