[TYPO3-english] Fill data of one field with data based on other field

[Guillermo R. Oramas J.]

Maybe this is possible with a hook but I'm not sure and need some help.

2011/7/1 Guillermo R. Oramas J. <oramas.g at gmail.com>:
> Hello.
>
> Is possible to fill data of one field with data based on other field?
>
> I have a custom table and I want to store from the BE the result of
> math expression in one field based in the value of other fields.
>
> Thanks a lot.
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