From: Alex Young <alex@...>
Date: 2007-03-26T23:11:08+09:00
Subject: Re: sorting an array based on two attributes of objects

senthil wrote:
>  Thanks for some of your replies for the lst post i need small
> modification in that post .. i want to sort the salary in descending
> order. i have explained the same quesion again....
> 
> Hi all,
>      I want to sort the objects of array based on two attributes.I want
> sort an employee class based on his salary in descecding order and name
> , so that if two
> person has same salary it should be sorted with name.
>      Lets say for example the employee objects has following name and
> salary.
> 
>          name      salary
>            d        100
>            c        200
>            b        50
>            a        100
> 
> 
>      so in this case the result which i expect is
> 
>          name      salary
>            b        200
>            a        100
>            d        100
>            c        50
> 
>   Note:In the above example for salary 100 the sorting is done
> alphabetically, but initially(before sorting) 'd' came first and then
> 'a' came.so basically i want to sort the array with more than one order.
>   Can any one help me to solve it ??
> 
In this case, just invert the salary:

sorted_employees = employees.sort_by { |e| [ -e.salary, e.name ] }

I can't think of a way offhand to have different lexicographic orderings 
in the same sort, though.

-- 
Alex