Initial commit

test/aggregation/list.dart

@@ -0,0 +1,38 @@
+void main() {
+  foo4();
+}
+
+void foo1() {
+  List<int> numList = [1, 9, 9, 4, 3, 2, 8];
+  int second = numList[1];
+  print(second);
+  numList[3] = 6;
+  print(numList);
+}
+
+void foo2() {
+  List<int> numList = [1, 9, 9, 4, 3, 2, 8];
+  numList.add(10);
+  numList.insert(0, 49);
+  print(numList);
+}
+
+void foo3() {
+  List<int> numList = [1, 9, 9, 4, 3, 2, 8];
+  numList.removeAt(2);
+  numList.remove(3);
+  numList.removeLast();
+  print(numList);
+}
+
+void foo4() {
+  List<int> numList = [1, 9, 9, 4,];
+  for (int i = 0; i < numList.length; i++) {
+    int value = numList[i];
+    print("索引:$i, 元素值:$value");
+  }
+
+  for(int value in numList){
+    print("元素值:$value");
+  }
+}

test/aggregation/map.dart

@@ -0,0 +1,37 @@
+void main() {
+  foo3();
+}
+
+void foo1() {
+  Map<int, String> numMap = {
+    0: 'zero',
+    1: 'one',
+    2: 'two',
+  };
+  print(numMap);
+  numMap.remove(1);
+  print(numMap);
+}
+
+void foo2() {
+  Map<int, String> numMap = {
+    0: 'zero',
+    1: 'one',
+    2: 'two',
+  };
+  numMap[3] = 'three';
+  numMap[4] = 'four';
+  print(numMap);
+}
+
+void foo3() {
+  Map<int, String> numMap = {
+    0: 'zero',
+    1: 'one',
+    2: 'two',
+  };
+  numMap.forEach((key, value) {
+    print("${key} = $value");
+  });
+}
+

test/aggregation/set.dart

@@ -0,0 +1,30 @@
+void main() {
+  foo3();
+}
+
+void foo1() {
+  Set<int> numSet = {1, 9, 9, 4};
+  print(numSet);
+}
+
+void foo2() {
+  Set<int> numSet = {1, 9, 4};
+  numSet.add(10);
+  numSet.remove(9);
+  print(numSet);
+}
+
+void foo3() {
+  Set<int> a = {1, 9, 4};
+  Set<int> b = {1, 9, 3};
+  print(a.difference(b));// 差集
+  print(a.union(b)); // 并集
+  print(a.intersection(b)); // 交集
+}
+
+void foo4() {
+  Set<int> numSet = {1, 9, 4};
+  for(int value in numSet){
+    print("元素值:$value");
+  }
+}