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Feature #9442
closedMultiple comparison construction with `==` and `===`
Status:
Rejected
Assignee:
-
Target version:
-
Description
I often want to write a condition that depends on multiple variables like this:
if a == 1 and b == 2 then ...
elsif a == 2 and b == 1 then ...
elsif a == 2 and b == 2 then ...
...
In order to make this compact, I sometimes write these cases like this:
case [a, b]
when [1, 2] then ...
when [2, 1] then ...
when [2, 2] then ...
...
or even
if [a, b] == [1, 2] then ...
elsif [a, b] == [2, 1] then ...
elsif [a, b] == [2, 2] then ...
...
but I feel that constructing these arrays is a waste of resource, as well as is not elegant to write.
I request a syntax feature that allows multiple comparison using ==
and ===
in the spirit of multiple assignment with =
:
x, y, z = :foo, :bar, :baz
so that the two examples above would be respectively written as:
case a, b
when 1, 2 then ...
when 2, 1 then ...
when 2, 2 then ...
...
and
if a, b == 1, 2 then ...
elsif a, b == 2, 1 then ...
elsif a, b == 2, 2 then ...
...
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