From: Gunther Diemant <g.diemant@...>
Date: 2011-07-01T20:17:34+09:00
Subject: Re: How to order Structs based on two fields

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Sorry code must be array.sort { |x,y| x.a =3D=3D y.a ? -(x.b <=3D> y.b) : x=
.a <=3D>
y.a }

2011/7/1 Gunther Diemant <g.diemant@gmx.net>

> Try this: array.sort { |x,y| x.a =3D=3D y.a ? x.b <=3D> y.b : x.a <=3D> y=
.a }
> Or overide the <=3D> method in your struct.
>
>
> 2011/7/1 I=F1aki Baz Castillo <ibc@aliax.net>
>
>> 2011/7/1 I=F1aki Baz Castillo <ibc@aliax.net>:
>> > I expected that the following could work:
>> >
>> >  array.sort_by{|entry| entry.a or entry.b}
>> >
>> > but it generates:
>> >
>> >   [kk1, kk2, kk3, kk4]
>> >
>> > so obviously it does not work. I'm not very used to Enumerable.sort_by
>> > method, any tip please?
>>
>> Maybe it would be better to use "class KK" rather than an struct, and
>> then define <=3D> method for KK class (and include Enumerable module)?
>>
>> --
>> I=F1aki Baz Castillo
>> <ibc@aliax.net>
>>
>>
>

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