Feature #8688: #sprintf should accept strings as keys

• Status: Open
• Assignee: -
• Target version: -

[Quintus (Marvin Gülker)]

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Hi there,

Kernel#sprintf should support strings as keys. Currently it only works with symbols:

{irb(main):001:0> str = "This is %{foo}."
=> "This is %{foo}."
irb(main):002:0> sprintf(str, :foo => "bar")
=> "This is bar."
irb(main):003:0> sprintf(str, "foo" => "bar")
KeyError: key{foo} not found
from (irb):3:in sprintf' from (irb):3 from /opt/rubies/mri/bin/irb:12:in '}

ruby -v: ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-linux]

If I want a user to be able to enter format strings and (later) the corresponding parameter values, I don’t want to call #to_sym on the keys (because generating symbols from user input is known to cause memory issues).

Valete,
Marvin

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