[ruby-core:102435] [Ruby master Feature#7394] Enumerable#find ifnone parameter could be non-callable

Issue #7394 has been updated by baweaver (Brandon Weaver).


A second argument, however, could be made that `find_index` provides a different API:

```ruby
(1..100).find_index(50)
```

...in which we have a similar API for predicate methods (`any?`),`grep`, and other `Enumerable` methods.

I could see cases for both, but the original proposed in this thread would make the most sense given the current API to avoid breakage.

----------------------------------------
Feature #7394: Enumerable#find ifnone parameter could be non-callable
https://bugs.ruby-lang.org/issues/7394#change-90319

* Author: zzak (Zachary Scott)
* Status: Assigned
* Priority: Normal
* Assignee: nobu (Nobuyoshi Nakada)
----------------------------------------
from github:
https://github.com/ruby/ruby/pull/186

In trunk the `Enumerable#find` method `ifnone` parameter has to be callable or `nil`. I found that sometimes I want to return a simple value without wrapping it in a proc. This pull request adds support for non-callable defaults when no items match.

```ruby
a = [1, 2, 3]
```

The current behavior

```ruby
a.find(proc { :foo }) { |x| x > 3 } #=> :foo
```

With patch

```ruby
a.find(0) { |x| x > 3 } #=> 0
```


---Files--------------------------------
enumerable_find_noncallable.patch (3.45 KB)


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