blob: f4da3ab14ff546f986f34d2101590c2f48980929 [file] [log] [blame]
// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
/// @assertion SplayTreeMap.from(Map other, [int compare(K key1, K key2),
/// bool isValidKey(potentialKey)])
/// Creates a [SplayTreeMap] that contains all key/value pairs of [other].
/// @description Checks that if [isValidKey] supplied and returns [false] then
/// element is assumed not to be in a map
/// @author
import "dart:collection";
import "../../../Utils/expect.dart";
class C {
int value;
int compare(var key1, var key2) {
return key1.value - key2.value;
bool isValidKey(var potentialKey) => potentialKey.value != 3;
main() {
C c1 = new C(1);
C c2 = new C(2);
C c3 = new C(3);
Map source = {c1: 1, c2: 2, c3: 3};
SplayTreeMap map = new SplayTreeMap.from(source, compare, isValidKey);
Expect.equals(3, map.length);