Suggestion: value_and_reset()

[jacobat]

Hi,

Would it be an idea to add a value_and_reset() function? I'm guessing it's a common use case to want to read the input and reset it at the same time.

[sayanarijit]

I actually never needed this. Can you show an example usecase?

In typical tui apps value() runs inside render function, while reset() runs inside update function.

[jacobat]

Here is an example: c38ec5f#diff-52701194e03c8c6d674a4a958346b037a3eaec243c30b0ef1fcbd93dff177ebcR73-R74

It's true that value() is used in the render function. But at some point you probably want to do something with the value, beyond rendering it, and this is when value_and_reset() would come in handy.

I've implemented a variant of the Elm architecture. In this I regularly receive a message that says "read the value from the input, store it in the model, and reset the input". Unfortunately I don't have any public code to show.

[sayanarijit]

Ah cool… nice catch.