1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
# Declarative::Option
_Dynamic options to evaluate at runtime._
## Installation
[](http://badge.fury.io/rb/mega-option)
Add this line to your application's Gemfile:
```ruby
gem 'mega-options'
```
Runs with Ruby >= 1.9.3.
# Option
Pass any value to `Option`, it will wrap it accordingly and make it executable, so you can call the value at runtime to evaluate it.
It works with static values.
```ruby
option = Declarative::Option(false)
option.(context, *args) #=> false
```
When passing in a `:symbol`, this will be treated as a method that's called on the context. The context is the first argument to `Option#call`.
```ruby
option = Declarative::Option(:object_id)
option.(Object.new, *args) #=> 2354383
```
Same with objects marked with `Callable`.
```ruby
class CallMe
include Declarative::Callable
def call(context, *args)
puts "hello!"
end
end
option = Declarative::Option(Callable.new) #=> "hello!"
```
And of course, with lambdas.
```ruby
option = Declarative::Option( ->(context, *args) { puts "yo!" } )
option.(context) #=> yo!
```
All `call` arguments behind the first are passed to the wrapped value.
# License
Copyright (c) 2017 by Nick Sutterer <apotonick@gmail.com>
Uber is released under the [MIT License](http://www.opensource.org/licenses/MIT).
|
