2023-05-25 17:47:19 +02:00
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# Lösung: Callback mit Proc
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2023-05-23 09:19:31 +02:00
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2023-05-25 17:47:19 +02:00
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<div style="border: 1px solid grey;"><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br></div>```ruby
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def rechner(a, b, lam = nil, &block)
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lam ||= block
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ergebnis = lam.call(a, b)
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ergebnis * 2
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end
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2023-05-25 17:47:19 +02:00
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lam = ->(a, b) { a + b }
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puts rechner(5, 4, lam) # -> 18
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```
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