Sorting user defined collection in multiple ways

[srinik....@gmail.com]

Hi,

I have below requirement, could any one suggest on how i can achieve in go lang using https://golang.org/pkg/sort/.

- I have user defined data structure called Employee with attributes "age", name and sal.  I want to write three different go functions that sorts based on age, name and sal.

example:-

  sortEmployeeByAge(employeelist)

  sortEmployeeByName(employeelist)

  sortEmployeeBySal(employeelist)

Thanks,

Srinivas K

[Jan Mercl]

On Fri, Jul 21, 2017 at 3:17 PM <srinik....@gmail.com> wrote:

> - I have user defined data structure called Employee with attributes "age", name and sal. I want to write three different go functions that sorts based on age, name and sal.

Are you sorting a slice? https://golang.org/pkg/sort/#Slice

--

-j

[Val]

Hello Srinivas

The traditional way to achieve this in go (as showcased here and here) is, to :

- declare a named type of slice

- implement 3 methods Len, Less, Swap

- call sort.Sort

(each attribute age, name, sal, needs its own type declaration and 3 method implementations).

Since Go 1.8, we can achieve basically the same with much less boilerplate code (as showcased here and here) :

- implement 1 func "less" having type  func(i, j int) bool

- call sort.Slice

(each attribute age, name, sal, needs its own "less" func).

I suggest the latter.

HTH

Valentin

[Srinivas Kandula]

Thank you very much Valentin !!, This is exactly what i am looking for.

Thanks,
Srinivas K