## v1.6.1
_released at 2020-12-22 13:22:35 UTC_
#### Deprecations
- Deprecate custom formatters to reduce complexity for Ractor support.
- Deprecate access to the `DidYouMean::SPELL_CHECKERS` constant for Ractor support.
#### Features
- The `did_you_mean` gem is now Ractor-compatible (`8faba54b`)
- Suggest keys on NoMatchingPatternKeyError (#159, @k-tsj)
- Make the same name check case-sensitive (#164, @pocke)
Before:
```ruby
DidYouMean::SpellChecker.new(dictionary: ['Method', 'MEthod']).correct("MEthod")
# => ['Method', 'method']
```
After:
```ruby
DidYouMean::SpellChecker.new(dictionary: ['Method', 'MEthod']).correct("MEthod")
# => ['Method']
```
## v1.6.0 (yanked)
_This version has been yanked due to significant and unexpected breaking changes._
## [v1.5.0](https://github.com/ruby/did_you_mean/tree/v1.5.0)
_released at 2020-12-22 05:47:21 UTC_
#### Features
- Suggest require paths on LoadError ([#143](https://github.com/ruby/did_you_mean/pull/143))
## [v1.4.0](https://github.com/ruby/did_you_mean/tree/v1.4.0)
_released at 2020-05-09 02:56:43 UTC_
As of Ruby 2.7, the `did_you_mean` gem has been promoted up to a default gem. I would like to thank [@kddeisz](https://github.com/kddeisz) for his hard work on making the entire gem easily portable the main ruby/ruby repo ([#132](https://github.com/ruby/did_you_mean/pull/132), [#131](https://github.com/ruby/did_you_mean/pull/131), and [ruby/ruby#2631](https://github.com/ruby/ruby/pull/2631)).
#### Features
- Add a new tree spell checker ([#119](https://github.com/ruby/did_you_mean/pull/119), [@obromios](https://github.com/obromios))
- Add a public API for registering an error ([#123](https://github.com/ruby/did_you_mean/pull/123), [@kddeisz](https://github.com/kddeisz))
#### Bug fixes
- Fixes a bug where wrong suggestion could be made when string requested on hash and keys are symbols ([@localhostdotdev](https://github.com/localhostdotdev), [#134](https://github.com/ruby/did_you_mean/pull/134))
#### Breaking changes
- Experimental features have been removed ([#135](https://github.com/ruby/did_you_mean/pull/135))
#### Internal changes
- Replace Travis CI with GitHub Actions ([#124](https://github.com/ruby/did_you_mean/pull/124))
- Drop mintiest dependency ([#129](https://github.com/ruby/did_you_mean/pull/129))
- Drop delegate dependency ([#138](https://github.com/ruby/did_you_mean/pull/138))
## [v1.3.1](https://github.com/ruby/did_you_mean/tree/v1.3.1)
_released at 2019-09-29 03:58:46 UTC_
#### Bug fixes
- Fixes a test failure in Ruby core where DYM attempts to mutate immutable strings from `Symbol#to_s` ([#125](https://github.com/ruby/did_you_mean/pull/125), [@nobu](https://github.com/nobu), [@eregon](https://github.com/eregon), [@MSP-Greg](https://github.com/MSP-Greg))
- Removes the empty `tmp/` directory to comply with `rpmlint` ([#122](https://github.com/ruby/did_you_mean/issues/122), [@pvalena](https://github.com/pvalena))
- Fixes a bug where suggestions are not shown on subsequent errors ([#120](https://github.com/ruby/did_you_mean/issues/120), [@localhostdotdev](https://github.com/localhostdotdev))
## [v1.3.0](https://github.com/ruby/did_you_mean/tree/v1.3.0)
_released at 2018-12-18 15:37:10 UTC_
**Starting version 1.3, the `did_you_mean` gem will be compatible with 2.6 and 2.5, and we will try to keep all subsequent versions compatible with Ruby 2.5 on an best-effort basis.**
- Version 1.2.0 only has support for Ruby 2.5.0 and later as it uses new features that are only available in 2.5.
- Versions earlier than 1.1.\* will still be maintained until Ruby 2.4 is deprecated.
- Versions earlier than 1.0.\* is still maintained, but are likely to be deprecated as Ruby 2.3 will (probably) be deprecated in 2019.
- Support for versions below 1.0 has already ended.
#### New features
- Suggest reserved words if there are close matches ([2a082a7](https://github.com/ruby/did_you_mean/commit/2a082a71991f5afe2e27ce9538103eac4c428025))
```ruby
results = yiedl
# NameError => undefined local variable or method `yiedl' for ...
# Did you mean? yield
```
#### Bug fixes
- Fixes a bug where name errors can not be dumped ([#108](https://github.com/ruby/did_you_mean/issues/108), [@jessebs](https://github.com/jessebs))
## [v1.2.2](https://github.com/ruby/did_you_mean/tree/v1.2.2)
_released at 2019-03-09 23:17:22 UTC_
#### Bug fixes
- Fixes a bug where name errors can not be dumped ([#108](https://github.com/ruby/did_you_mean/issues/108), [@jessebs](https://github.com/jessebs))
## [v1.2.1](https://github.com/ruby/did_you_mean/tree/v1.2.1)
_released at 2018-04-03 04:44:47 UTC_
#### Bug Fixes
- Fixed a bug where DYM suggests the same class name in the error message ([#102](https://github.com/ruby/did_you_mean/issues/102), [@schneems](https://github.com/schneems))
- Fixed a bug where the deprecated `DidYouMean::Formatter` has been removed unexpectedly ([#103](https://github.com/ruby/did_you_mean/issues/103), [4b5ba32](https://github.com/ruby/did_you_mean/commit/4b5ba3215975df1dd8e9c7eacffcf02abfffa92e))
#### Other Changes
- Non-production code that has a non-commercial license has been removed from gem releases ([#105](https://github.com/ruby/did_you_mean/issues/105), [@jbotelho2-bb](https://github.com/jbotelho2-bb))
## [v1.2.0](https://github.com/ruby/did_you_mean/tree/v1.2.0)
_released at 2018-01-02 20:49:35 UTC_
**This version 1.2.0 only has support for Ruby 2.5.0 and later as it uses new features that are only available in 2.5. All future patch releases under 1.2.\* will only be compatible with Ruby 2.5.0 and later as well. Versions earlier than 1.1.\* will still be maintained until Ruby 2.4 is deprecated. Any other versions below 1.0 will no longer be maintained.**
#### New features
- The `KeyError` name suggestion feature has been promoted to a stable feature and is available by default ([acf5945](https://github.com/ruby/did_you_mean/commit/acf59450dfb67eefae9b465ccc8029af46ae7dd0), [https://bugs.ruby-lang.org/issues/12063](https://bugs.ruby-lang.org/issues/12063))
- Now suggests `true`, `false` or `nil` if a NameError occurs because of a typo in these names ([#94](https://github.com/ruby/did_you_mean/pull/94), [@styd](https://github.com/styd))
- New Formatter API: This provides a clean way to customize DidYouMean’s formatter without overriding the default formatter. Please refer to [the built-in verbose formatter](https://github.com/ruby/did_you_mean/blob/671cdff/lib/did_you_mean/verbose.rb) for how to use it
## [v1.1.3](https://github.com/ruby/did_you_mean/tree/v1.1.3)
_released at 2019-03-09 23:16:54 UTC_
#### Bug fixes
- Fixes a bug where name errors can not be dumped ([#108](https://github.com/ruby/did_you_mean/issues/108), [@jessebs](https://github.com/jessebs))
- Fixed a bug where DYM suggests the same class name in the error message ([#102](https://github.com/ruby/did_you_mean/issues/102), [@schneems](https://github.com/schneems))
## [v1.1.2](https://github.com/ruby/did_you_mean/tree/v1.1.2)
_released at 2017-09-24 07:28:48 UTC_
**This version is only compatible with Ruby 2.4 and later.**
#### Bug Fixes
- Fixed a bug where `did_you_mean` shows duplicate suggestions when the exception is raised multiple times ([#84](https://github.com/ruby/did_you_mean/pull/84), [c2e4008](https://github.com/ruby/did_you_mean/commit/c2e40083cef604c00ccd10efc6d7a5036ad9eb5b))
## [v1.1.1](https://github.com/ruby/did_you_mean/tree/v1.1.1)
_released at 2017-09-24 07:24:02 UTC_
### This version has been yanked from Rubygems.org and is not available.
## [v1.1.0](https://github.com/ruby/did_you_mean/tree/v1.1.0)
_released at 2016-12-19 23:19:06 UTC_
The version `1.1.0` only has support for Ruby 2.4.0 and later. Also, all patch releases under `1.1.*` will only be compatible with Ruby 2.4.0 and later as well. Versions under `1.0.*` will still be maintained until Ruby 2.3 is deprecated. Any other versions below `1.0` will no longer be maintained.
#### New Features
- Suggest a method name on a NameError from the `Struct#[]` or `Struct#[]=` method ([#73](https://github.com/ruby/did_you_mean/pull/73)):
```ruby
Struct.new(:foo).new[:fooo]
# => NameError: no member 'fooo' in struct
# Did you mean? foo
# foo=
```
- Added a public interface for the gem's spell checker:
```ruby
DidYouMean::SpellChecker.new(dictionary: ['email', 'fail', 'eval']).correct('meail')
# => ['email']
```
- Methods defined on `nil` by default are no longer suggested. Note that methods, defined after the gem is loaded, will still be suggested (e.g. ActiveSupport).
#### Bug Fixes
- Fixed a bug where private method names were added to the dictionary when an argument was passed in to a public method. Use the `NoMethodError#private_call?` method instead ([0a1b761](https://github.com/ruby/did_you_mean/commit/0a1b7612252055e583a373b473932f789381ca0f))
## [v1.0.4](https://github.com/ruby/did_you_mean/tree/v1.0.4)
_released at 2019-03-09 23:16:38 UTC_
#### Bug fixes
- Fixes a bug where name errors can not be dumped ([#108](https://github.com/ruby/did_you_mean/issues/108), [@jessebs](https://github.com/jessebs))
- Fixed a bug where DYM suggests the same class name in the error message ([#102](https://github.com/ruby/did_you_mean/issues/102), [@schneems](https://github.com/schneems))
## [v1.0.3](https://github.com/ruby/did_you_mean/tree/v1.0.3)
_released at 2017-09-24 07:22:07 UTC_
**This version is compatible with Ruby 2.3 and older**
#### Bug Fixes
- Fixed a bug where `did_you_mean` shows duplicate suggestions when the exception is raised multiple times ([#84](https://github.com/ruby/did_you_mean/pull/84), [c2e4008](https://github.com/ruby/did_you_mean/commit/c2e40083cef604c00ccd10efc6d7a5036ad9eb5b))
## [v1.0.2](https://github.com/ruby/did_you_mean/tree/v1.0.2)
_released at 2016-11-20 18:03:07 UTC_
**This version is compatible with Ruby 2.3 and older**
#### Features
- Experimental features are officially available through `require 'did_you_mean/experimental'`
#### Deprecations
- `require 'did_you_mean/extra_features'` is now deprecated in favor of `require 'did_you_mean/experimental'`
#### Internal Changes
- Replaced the `DidYouMean::SpellCheckable` module with the `DidYouMean::SpellChecker` class. This is a slower implementation but close to the model explained in [this talk](https://speakerdeck.com/yuki24/saving-people-from-typos), more reusable and possibly makes it easier to expose the class as a public interface.
## [v1.0.1](https://github.com/ruby/did_you_mean/tree/v1.0.1)
_released at 2016-05-15 05:17:22 UTC_
#### Bug Fixes
- Fixed a bug where the gem suggests what is actually typed by the user: [1c52c88](https://github.com/ruby/did_you_mean/commit/1c52c887c62b0921e799f94bcc4a846dc7cbc057)
- Fixed features that didn't work on JRuby 9.1.0.0: [dc48dde](https://github.com/ruby/did_you_mean/commit/dc48dde1b2a8f05aab1fcf897e1cb3075a206f53), [4de23f8](https://github.com/ruby/did_you_mean/commit/4de23f880502c80c5f321371d39c08bb0fa34040), [00e3059](https://github.com/ruby/did_you_mean/commit/00e305971060d150fae4817b5e895d6478b37579). The local variable name correction is still disabled. Also see: [jruby/jruby#3480](https://github.com/jruby/jruby/issues/3480)
## [v1.0.0](https://github.com/ruby/did_you_mean/tree/v1.0.0)
_released at 2015-12-25 05:13:04 UTC_
#### Features
- Introduced a [verbose formatter](https://github.com/ruby/did_you_mean#verbose-formatter)
- Introduced an easy way to enabling [experimental features](https://github.com/ruby/did_you_mean#experimental-features)
#### Bug Fixes
- Fixed a bug where the Jaro-Winkler implementation returns the wrong distance when 2 identical strings are given. fixes [#58](https://github.com/ruby/did_you_mean/pull/58)
#### Internal Changes
- Slightly changed the spell checking algorithm. Take a look at [e2f5b24](https://github.com/ruby/did_you_mean/commit/e2f5b2437f967565e4830eab6077f73ae166e0a7) for more details. fixes [#60](https://github.com/ruby/did_you_mean/issues/60)
## [v1.0.0.rc1](https://github.com/ruby/did_you_mean/tree/v1.0.0.rc1)
_released at 2015-12-25 05:02:25 UTC_
#### Internal Changes
- No longer uses `TracePoint` API by default. fixes [#55](https://github.com/ruby/did_you_mean/issues/55) and [#56](https://github.com/ruby/did_you_mean/issues/56)
## [v1.0.0.beta3](https://github.com/ruby/did_you_mean/tree/v1.0.0.beta3)
_released at 2015-12-25 04:56:13 UTC_
#### Internal Changes
- Use the `frozen-string-literal` pragma rather than calling `.freeze` everywhere
- Use the `NameError#receiver` method in `DidYouMean:: ClassNameChecker` to know the namespace where the constant call is made
- Refactored the `SpellCheckerTest`
## [v1.0.0.beta2](https://github.com/ruby/did_you_mean/tree/v1.0.0.beta2)
_released at 2015-12-25 04:50:36 UTC_
#### Bug Fixes
- Fixed a bug where the gem doesn't install properly on Ruby 2.3.0dev
## [v1.0.0.beta1](https://github.com/ruby/did_you_mean/tree/v1.0.0.beta1)
_released at 2015-12-25 05:27:53 UTC_
#### Breaking Changes
- Dropped support for MRIs older than 2.3, JRuby and Rubinus
#### Internal Changes
- The C extension has been removed since the `NameError#receiver` method has become part of the MRI 2.3
- The interception gem has been removed from the dependencies
- Removed code that was needed to support multiple Ruby implementations
## [v0.10.0](https://github.com/ruby/did_you_mean/tree/v0.10.0)
_released at 2015-08-21 06:44:11 UTC_
#### Features
- Now it corrects an instance variable name if the ivar name is mistyped and `NoMethodError` is raised:
```ruby
@number = 1
@nubmer.zero?
# => NoMethodError: undefined method `zero?' for nil:NilClass
#
# Did you mean? @number
#
```
- Support for JRuby 9.0.0.0
- Prefix-based correction ( [@tjohn](https://github.com/tjohn), [#50](https://github.com/ruby/did_you_mean/issues/50 "Match start of method name"), [#49](https://github.com/ruby/did_you_mean/issues/49 "Use Jaro distance instead of Jaro-Winkler distance"))
- Correction search is about 75% faster than 0.9.10
#### Breaking Changes
- The ActiveRecord integration has been removed
## [v0.9.10](https://github.com/ruby/did_you_mean/tree/v0.9.10)
_released at 2015-05-14 03:04:47 UTC_
#### Bug Fixes
- Fixed a bug where a duplicate "did you mean?" message was appended each time `#to_s` is called ( [@danfinnie](https://github.com/danfinnie), [#51](https://github.com/ruby/did_you_mean/issues/51 "Duplicate output for constants in separate gem"))
## [v0.9.9](https://github.com/ruby/did_you_mean/tree/v0.9.9)
_released at 2015-05-13 03:48:19 UTC_
#### Features
- Order word suggestions based on Levenshtein distance ( [@tleish](https://github.com/tleish), [#31](https://github.com/ruby/did_you_mean/pull/31))
#### Internal Changes
- Reduce memory allocation by about 40%
- Speed up Levenshtein distance calculation by about 40%
- The Java extension has been replaced with a pure JRuby implementation
## [v0.9.8](https://github.com/ruby/did_you_mean/tree/v0.9.8)
_released at 2015-04-12 01:55:27 UTC_
#### Internal Changes
- Speed up Levenshtein by 50% and reduce 97% of memory usage
## [v0.9.7](https://github.com/ruby/did_you_mean/tree/v0.9.7)
_released at 2015-04-02 04:20:26 UTC_
#### Bug Fixes
- Fixed an issue where _did\_you\_mean_ doesn't install on JRuby properly.
## [v0.9.6](https://github.com/ruby/did_you_mean/tree/v0.9.6)
_released at 2015-01-24 23:19:27 UTC_
#### Bug Fixes
- Fixed a bug where did\_you\_mean incorrectly suggests protected methods when it just isn't callable ( [@glittershark](https://github.com/glittershark), [#34](https://github.com/ruby/did_you_mean/issues/34 "Did\_you\_mean incorrectly called when attempting to call protected/private method"))
## [v0.9.5](https://github.com/ruby/did_you_mean/tree/v0.9.5)
_released at 2015-01-07 12:41:23 UTC_
#### Bug Fixes
- Whitelist `#safe_constantize` method from `ActiveSupport::Inflector` to avoid significant performance slowdown ( [@tleish](https://github.com/tleish), [#19](https://github.com/ruby/did_you_mean/issues/19 "Significant Slowdown when Using Debugger"), [#20](https://github.com/ruby/did_you_mean/pull/20 "Whitelisting safe\_constantize (ActiveSupport::Inflector) method"))
## [v0.9.4](https://github.com/ruby/did_you_mean/tree/v0.9.4)
_released at 2014-11-19 20:00:00 UTC_
#### Bug Fixes
- Fixed a bug where no suggestions will be made on JRuby
## [v0.9.3](https://github.com/ruby/did_you_mean/tree/v0.9.3)
_released at 2014-11-18 03:50:11 UTC_
**This version has been yanked from rubygems.org as it doesn't work with jRuby at all. Please upgrade to 0.9.4 or higher as soon as possible.**
#### Internal Changes
- Replaced the crazy C extension with a so much better one (thanks to [@nobu](https://github.com/nobu)!)
## [v0.9.2](https://github.com/ruby/did_you_mean/tree/v0.9.2)
_released at 2014-11-17 15:32:33 UTC_
#### Bug Fixes
- Fixed a bug where did\_you\_mean doesn't compile on Ruby 2.1.2/2.1.5 ( [#16](https://github.com/ruby/did_you_mean/issues/16 "Gem building failed on Debian 6.0.10 x86\_64"))
## [v0.9.1](https://github.com/ruby/did_you_mean/tree/v0.9.1)
_released at 2014-11-16 18:54:24 UTC_
**This version has been yanked from rubygems.org as it doesn't compile on Ruby 2.1.2 and 2.1.5. Please upgrade to 0.9.4 or higher as soon as possible.**
#### Internal Changes
- Shrink the gem size by removing unneeded ruby header files.
- Now it forces everyone to upgrade the gem when they upgrade Ruby to a new version. This avoids introducing a bug like [#14](https://github.com/ruby/did_you_mean/issues/14 "Compatibility with `letter\_opener` gem").
## [v0.9.0](https://github.com/ruby/did_you_mean/tree/v0.9.0)
_released at 2014-11-09 01:26:31 UTC_
#### Features
- did\_you\_mean now suggests instance variable names if `@` is missing ( [#12](https://github.com/ruby/did_you_mean/issues/12 "Suggest instance- and class-vars"), [39d1e2b](https://github.com/ruby/did_you_mean/commit/39d1e2bd66d6ff8acbc4dd5da922fc7e5fcefb20))
```ruby
@full_name = "Yuki Nishijima"
first_name, last_name = full_name.split(" ")
# => NameError: undefined local variable or method `full_name' for main:Object
#
# Did you mean? @full_name
#
```
#### Bug Fixes
- Fixed a bug where did\_you\_mean changes some behaviours of Ruby 2.1.3/2.1.4 installed on Max OS X ( [#14](https://github.com/ruby/did_you_mean/issues/14 "Compatibility with `letter\_opener` gem"), [44c451f](https://github.com/ruby/did_you_mean/commit/44c451f8c38b11763ba28ddf1ceb9696707ccea0), [9ebde21](https://github.com/ruby/did_you_mean/commit/9ebde211e92eac8494e704f627c62fea7fdbee16))
- Fixed a bug where sometimes `NoMethodError` suggests duplicate method names ( [9865cc5](https://github.com/ruby/did_you_mean/commit/9865cc5a9ce926dd9ad4c20d575b710e5f257a4b))
## [v0.8.0](https://github.com/ruby/did_you_mean/tree/v0.8.0)
_released at 2014-10-27 02:03:13 UTC_
**This version has been yanked from rubygems.org as it has a serious bug with Ruby 2.1.3 and 2.1.4 installed on Max OS X. Please upgrade to 0.9.4 or higher as soon as possible.**
#### Features
- JRuby support!
#### Bug Fixes
- Fixed a bug where did\_you\_mean unexpectedly disables [better\_errors](https://github.com/charliesome/better_errors)'s REPL
- Replaced [binding\_of\_caller](https://github.com/banister/binding_of_caller) dependency with [interception](https://github.com/ConradIrwin/interception)
- Fixed the wrong implementation of Levenshtein algorithm ( [#2](https://github.com/ruby/did_you_mean/pull/2 "Fix bug of DidYouMean::Levenshtein#min3."), [@fortissimo1997](https://github.com/fortissimo1997))
## [v0.7.0](https://github.com/ruby/did_you_mean/tree/v0.7.0)
_released at 2014-09-26 03:37:18 UTC_
**This version has been yanked from rubygems.org as it has a serious bug with Ruby 2.1.3 and 2.1.4 installed on Max OS X. Please upgrade to 0.9.4 or higher as soon as possible.**
#### Features
- Added support for Ruby 2.1.3, 2.2.0-preview1 and ruby-head
- Added support for ActiveRecord 4.2.0.beta1
- Word searching is now about 40% faster than v0.6.0
- Removed `text` gem dependency
- Better output on pry and Rspec
#### Internal Changes
- A lot of internal refactoring
## [v0.6.0](https://github.com/ruby/did_you_mean/tree/v0.6.0)
_released at 2014-05-18 00:23:24 UTC_
**This version has been yanked from rubygems.org as it has a serious bug with Ruby 2.1.3 and 2.1.4 installed on Max OS X. Please upgrade to 0.9.4 or higher as soon as possible.**
#### Features
- Added basic support for constants. Now you'll see class name suggestions when you misspelled a class names/module names:
```ruby
> Ocject
# => NameError: uninitialized constant Ocject
#
# Did you mean? Object
#
```
#### Bug Fixes
- Fixed a bug where did\_you\_mean segfaults on Ruby head(2.2.0dev)
## [v0.5.0](https://github.com/ruby/did_you_mean/tree/v0.5.0)
_released at 2014-05-10 17:59:54 UTC_
#### Features
- Added support for Ruby 2.1.2
## [v0.4.0](https://github.com/ruby/did_you_mean/tree/v0.4.0)
_released at 2014-04-20 02:10:31 UTC_
#### Features
- did\_you\_mean now suggests a similar attribute name when you misspelled it.
```ruby
User.new(flrst_name: "wrong flrst name")
# => ActiveRecord::UnknownAttributeError: unknown attribute: flrst_name
#
# Did you mean? first_name: string
#
```
#### Bug Fixes
- Fixed a bug where did\_you\_mean doesn't work with `ActiveRecord::UnknownAttributeError`
## [v0.3.1](https://github.com/ruby/did_you_mean/tree/v0.3.1)
_released at 2014-03-20 23:16:20 UTC_
#### Features
- Changed output for readability.
- Made the spell checking algorithm slight better to find the correct method.
## [v0.3.0](https://github.com/ruby/did_you_mean/tree/v0.3.0)
_released at 2014-03-20 23:13:13 UTC_
#### Features
- Added support for Ruby 2.1.1 and 2.2.0(head).
## [v0.2.0](https://github.com/ruby/did_you_mean/tree/v0.2.0)
_released on 2014-03-20 23:12:13 UTC_
#### Features
- did\_you\_mean no longer makes Ruby slow.
#### Breaking Changes
- dropped support for JRuby and Rubbinious.
## [v0.1.0: First Release](https://github.com/ruby/did_you_mean/tree/v0.1.0)
_released on 2014-03-20 23:11:14 UTC_
- Now you will have "did you mean?" experience in Ruby!
- but still very experimental since this gem makes Ruby a lot slower.