sort post and subcategories with the last post by date

Hi,

I would like to display in the category template, the post title of this category and his subcategories title, but all sorted by date.

I would like to display in list-item: “<icon file>Shellcodes x86 et x86_64”, “<icon folder>Iptables” et “<icon file>Aide pour la config d’un kernel Linux”.

But all sorted by date (take the date of the last post for subcategories)

(I do not want to separate article and subcategories, but differentiate them by an icon.)

I need help for create the while and the sort function.

Thank you in advance

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