[ruby-core:77125] [Ruby trunk Bug#12719] `Struct#|` for partial updates
From:
halogenandtoast@...
Date:
2016-09-02 09:27:48 UTC
List:
ruby-core #77125
Issue #12719 has been reported by Matthew Mongeau.
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Bug #12719: `Struct#|` for partial updates
https://bugs.ruby-lang.org/issues/12719
* Author: Matthew Mongeau
* Status: Open
* Priority: Normal
* Assignee:
* ruby -v:
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
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Other languages have operators for performing partial updates on maps. I feel like Struct could be more useful if it provided an easy way of performing partial (or full) updates.
After the change you can do the following:
~~~ ruby
Point = Struct.new(:x, :y)
p = Point.new(1, 2)
p2 = p | { y: 4 }
p3 = p2 | { x: 10 }
puts p.inspect # => #<struct Point x=1, y=2>
puts p2.inspect # => #<struct Point x=1, y=4>
puts p3.inspect # => #<struct Point x=10, y=4>
~~~
---Files--------------------------------
struct_update.patch (2.04 KB)
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