Datenfelder
Speaker Notes
This slide should take about 5 minutes.
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A value of the array type
[T; N]
holdsN
(a compile-time constant) elements of the same typeT
. Note that the length of the array is part of its type, which means that[u8; 3]
and[u8; 4]
are considered two different types. Slices, which have a size determined at runtime, are covered later. -
Try accessing an out-of-bounds array element. Array accesses are checked at runtime. Rust can usually optimize these checks away, and they can be avoided using unsafe Rust.
-
Wir können Literale verwenden, um Arrays Werte zuzuweisen.
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The
println!
macro asks for the debug implementation with the?
format parameter:{}
gives the default output,{:?}
gives the debug output. Types such as integers and strings implement the default output, but arrays only implement the debug output. This means that we must use debug output here. -
Das Hinzufügen von
#
, z. B.{a:#?}
, ruft ein „hübsches Druckformat“ (pretty print) auf, das einfacher zu lesen ist.