From: nobu@ruby-lang.org
To: ruby-core@ruby-lang.org
Subject: [ruby-core:71430] [Ruby trunk - Bug #11661] sprintf causes a KeyError instead of using a default value for hash substitution
Date: Tue, 10 Nov 2015 11:37:03 +0000 [thread overview]
Message-ID: <redmine.journal-54800.20151110113702.46cc08c2fbd466fa@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-11661.20151105204817@ruby-lang.org
Issue #11661 has been updated by Nobuyoshi Nakada.
Tracker changed from Feature to Bug
Backport set to 2.0.0: REQUIRED, 2.1: REQUIRED, 2.2: REQUIRED
----------------------------------------
Bug #11661: sprintf causes a KeyError instead of using a default value for hash substitution
https://bugs.ruby-lang.org/issues/11661#change-54800
* Author: Eddy Luten
* Status: Assigned
* Priority: Normal
* Assignee: Yukihiro Matsumoto
* ruby -v:
* Backport: 2.0.0: REQUIRED, 2.1: REQUIRED, 2.2: REQUIRED
----------------------------------------
When using a format string that substitutes hash values (or using the `%` operator on a string), instead of using the Hash's default value if a key is not present, it causes a KeyError.
As an end-user, to get around this, my hash needs to know about all the possible keys ahead of time and pre-assign a value to them or handle the KeyError. Logically, I would assume that the `sprintf` implementation would use the default Hash value.
I wanted to open this issue to see what your collective thoughts were on this since I have a fork running locally that fixes this issue and was wondering if I could send a patch/PR for this.
This issue is reproducible using the following code:
```ruby
my_hash = Hash.new('world')
puts "hello %{location}" % my_hash # expecting "hello world"
# "KeyError: key{location} not found"
```
--
https://bugs.ruby-lang.org/
next prev parent reply other threads:[~2015-11-10 11:07 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <redmine.issue-11661.20151105204817@ruby-lang.org>
2015-11-05 20:48 ` [ruby-core:71354] [Ruby trunk - Bug #11661] [Open] sprintf causes a KeyError instead of using a default value for hash substitution eddyluten
2015-11-08 7:58 ` [ruby-core:71386] [Ruby trunk - Feature #11661] [Feedback] " nobu
2015-11-08 8:36 ` [ruby-core:71387] [Ruby trunk - Feature #11661] [Assigned] " nobu
2015-11-10 11:37 ` nobu [this message]
2015-11-10 12:34 ` [ruby-core:71431] [Ruby trunk - Bug #11661] " hanmac
2015-11-10 19:57 ` [ruby-core:71434] " eddyluten
2015-11-10 23:21 ` [ruby-core:71436] " nobu
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