ruby-uebungen/Assignment_020/solution/readme.md

# Lösung: Callback mit Proc


```ruby
def rechner(a, b, lam = nil, &block)
  lam ||= block
  ergebnis = lam.call(a, b)
  ergebnis * 2
end

lam = ->(a, b) { a + b }
puts rechner(5, 4, lam) # -> 18
```
Update of exercises 2023-05-25 17:47:19 +02:00			`# Lösung: Callback mit Proc`
Initial commit 2023-05-23 09:19:31 +02:00
Update of exercises 2023-05-25 17:49:42 +02:00
			```ruby
Update of exercises 2023-05-25 17:47:19 +02:00			`def rechner(a, b, lam = nil, &block)`
			`lam \|\|= block`
			`ergebnis = lam.call(a, b)`
			`ergebnis * 2`
Initial commit 2023-05-23 09:19:31 +02:00			`end`

Update of exercises 2023-05-25 17:47:19 +02:00			`lam = ->(a, b) { a + b }`
			`puts rechner(5, 4, lam) # -> 18`
			```