Enhancement request: A List method to return a new List containing a certain property of each List member. #15278
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area-core-library
SDK core library issues (core, async, ...); use area-vm or area-web for platform specific libraries.
closed-not-planned
Closed as we don't intend to take action on the reported issue
type-enhancement
A request for a change that isn't a bug
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To access an object property by name, you need to use mirrors. We don't generally put that kind of functionality into the core libraries, so the feature as described is not going to happen. We have a very similar functionality in the "map" method, but you have to pass a function that gets the x property, like "list.map((o)=>o.x)". It is lazy and returns an Iterable, so if you need a list, you can do: Removed Area-Documentation, Type-Defect labels. |
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This comment was originally written by @seaneagan I added a feature request to quiver, to see if this fits there: |
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This issue was originally filed by @xximranxx
Say you have a class:
class Basic {
int x;
Basic(this.x);
}
and a list of this class:
main() {
List<Basic> basic_list = [new Basic(1),new Basic(2)];
}
Now it would be nice to have a method to return a List of the x property of each List member:
main() {
List<Basic> basic_list = [new Basic(1),new Basic(2)];
List<int> int_list = basic_list.getPropertyList('x');
for(int tmp_x in int_list) {
print(tmp_x);
}
}
would output:
1
2
Thanks,
Imran
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