Enum

ruby-talk
1

Hallo
How can I add methods to Enuerable??

class Enumerable end # => TypeError: Enumerable is not a class ##
Yes, its a module...

I want to have a method which can be used by Array, Hash and Enum likewise.

Maybe the question then is: How to change a Module?

Thank you
Opti

2

Enumerable is a Module not a class.

···

On Aug 17, 2022, at 7:01 PM, Die Optimisten <inform@die-optimisten.net> wrote:

Hallo
How can I add methods to Enuerable??

class Enumerable end # => TypeError: Enumerable is not a class ##
Yes, its a module...

I want to have a method which can be used by Array, Hash and Enum likewise.

Maybe the question then is: How to change a Module?

Thank you
Opti

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3

Use-case: for example: sortCol1: sort_by{|x| x[0] } # =>
(1..10).sortB; hash.sortB

···

Am 17.08.22 um 20:01 schrieb Die Optimisten:

Hallo
How can I add methods to Enuerable??

class Enumerable end # => TypeError: Enumerable is not a class ##
Yes, its a module...

I want to have a method which can be used by Array, Hash and Enum
likewise.

Maybe the question then is: How to change a Module?

4

Hallo
How can I add methods to Enuerable??

Would be nice if you would check your mail before sending it.

class Enumerable end # => TypeError: Enumerable is not a class ##
Yes, its a module...

I want to have a method which can be used by Array, Hash and Enum likewise.

Maybe the question then is: How to change a Module?

Did you try it? There is nothing special here:

/ # irb
irb(main):001:1* module Enumerable
irb(main):002:2* def foo
irb(main):003:2* puts "xx"
irb(main):004:1* end
irb(main):005:0> end
=> :foo
irb(main):006:0> .foo
xx
=> nil

W.

···

On 2022-08-17 20:01:16 +0200, Die Optimisten wrote:

--
There are only two hard things in Computer Science:
cache invalidation, naming things and off-by-one errors.