Tutorial #30 - Passing Callback Functions Around(Flutter App Development Tutorials)

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Tutorial #30 - Passing Callback Functions Around(Flutter App Development Tutorials)
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min. 10.05. It still throws an error when i type the function name (selectHandler) after on pressed:
There's no quick fix and I don't know how to proceed at this point.

jannex
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this is just passing the function pointer to the child and pushing data to child. How to get data (as a callback) from child to parent. This is the real question which flutter lacks. Let's say you have a textfield (in the child) and the parent wants to know the text which has changed. How to get child textfield string to the parent?

prettygirl
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