:sig
template<typename F> bool StringList::every(F f) const

:params
f : predicate called with each string
return value : `true` when every item matches

:content
Tests whether all strings in the list satisfy the predicate. Use it for validation checks where a list is acceptable only if every member passes the same rule.

:example
StringList routes = split("dashboard,index,themes", ",");
bool all_named = routes.every([](String item) { return(item != ""); });
print(all_named ? "all named\n" : "missing name\n");

:see
>types
0_StringList
2_StringList_some
2_StringList_find
2_StringList_filter