I want to create a buffer that can appended things.
For example
var allInput = new Uint8List(1);
allInput.add(list)
But it's informed me that this is can not be modify.
-
1I'm curious why you're using Uint8List ? We might need to make it more clear that List is probably what most people want.Seth Ladd– Seth Ladd2013-01-10 21:47:50 +00:00Commented Jan 10, 2013 at 21:47
Add a comment
|
2 Answers
Per the API docs, Uint8List is a fixed list. You could use code such as:
var allInput = new Uint8List(1);
allInput[0] = 123;
If you want a growable list, you could do something like:
var allInput = new List();
allInput.addAll(list);
or
var allInput = new List<int>();
allInput.addAll(list);
Essentially, if you provide a size specifier when creating a list, that makes it fixed size. Otherwise it's extendable (ref)
1 Comment
lygstate
Thanks for that, indeed, I used Uint8List(1) for high performance and low memroy footprint.
What Chris writes in his answer is correct today, but starting soon, the generic List constructor will not be fixed length when a length argument is given. The list’s size will still be changeable afterwards. There will also be a couple of additional named constructors for List:
factory List.fixedLength(int length, {E fill: null})
factory List.filled(int length, E fill)
these will help with constructing fixed length lists and creating lists with pre-filled values.
For details on bleeding edge changes to List, see:
http://api.dartlang.org/docs/bleeding_edge/dart_core/List.html
Comments
