Strange behavior for method default parameters initialization

Question

When I am trying to initialize this it is working perfectly fine

class Abc def initialize(parent_id, user = nil, permission) end end Abc.new(1 ,2, "some_permission")

But when I am doing this

 class Abc def initialize(parent_id, user = nil, permission, g_data = nil) end end

Abc.new(1 ,2, "some_permission", 4)

I am getting syntax error syntax error, unexpected '=', expecting ')' This is a strange behavior why it is not taking two arguments default as nil

zeitnot · Accepted Answer · 2019-03-08 10:57:52Z

According to ruby documentation the default values should be grouped.

The default value does not need to appear first, but arguments with defaults must be grouped together.

So according to this rule your method arguments should be listed like following:

 class Abc def initialize(parent_id, user = nil,g_data = nil,permission) end # OR def initialize(parent_id, permission,user = nil,g_data = nil) end end

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