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@@ -433,7 +433,7 @@ elementAddr = firtstElementAddr + elementLength * elementIndex
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fn extend(mem_allocator: std.mem.Allocator, nums: []i32, enlarge: usize) ![]i32 {
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// 初始化一个扩展长度后的数组
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var res = try mem_allocator.alloc(i32, nums.len + enlarge);
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std.mem.set(i32, res, 0);
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@memset(res, 0);
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// 将原数组中的所有元素复制到新数组
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std.mem.copy(i32, res, nums);
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// 返回扩展后的新数组
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@@ -1077,7 +1077,7 @@ elementAddr = firtstElementAddr + elementLength * elementIndex
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```zig title="array.zig"
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// 在数组中查找指定元素
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fn find(nums: []i32, target: i32) i32 {
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for (nums) |num, i| {
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for (nums, 0..) |num, i| {
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if (num == target) return @intCast(i32, i);
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}
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return -1;
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@@ -1093,7 +1093,7 @@ comments: true
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extendRatio int
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}
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/* 构造方法 */
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/* 构造函数 */
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func newMyList() *myList {
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return &myList{
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numsCapacity: 10, // 列表容量
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@@ -1716,23 +1716,23 @@ comments: true
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const Self = @This();
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nums: []T = undefined, // 数组(存储列表元素)
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nums_capacity: usize = 10, // 列表容量
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num_size: usize = 0, // 列表长度(即当前元素数量)
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extend_ratio: usize = 2, // 每次列表扩容的倍数
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numsCapacity: usize = 10, // 列表容量
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numSize: usize = 0, // 列表长度(即当前元素数量)
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extendRatio: usize = 2, // 每次列表扩容的倍数
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mem_arena: ?std.heap.ArenaAllocator = null,
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mem_allocator: std.mem.Allocator = undefined, // 内存分配器
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// 构造方法(分配内存+初始化列表)
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// 构造函数(分配内存+初始化列表)
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pub fn init(self: *Self, allocator: std.mem.Allocator) !void {
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if (self.mem_arena == null) {
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self.mem_arena = std.heap.ArenaAllocator.init(allocator);
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self.mem_allocator = self.mem_arena.?.allocator();
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}
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self.nums = try self.mem_allocator.alloc(T, self.nums_capacity);
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std.mem.set(T, self.nums, @as(T, 0));
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self.nums = try self.mem_allocator.alloc(T, self.numsCapacity);
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@memset(self.nums, @as(T, 0));
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}
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// 析构方法(释放内存)
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// 析构函数(释放内存)
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pub fn deinit(self: *Self) void {
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if (self.mem_arena == null) return;
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self.mem_arena.?.deinit();
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@@ -1740,12 +1740,12 @@ comments: true
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// 获取列表长度(即当前元素数量)
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pub fn size(self: *Self) usize {
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return self.num_size;
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return self.numSize;
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}
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// 获取列表容量
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pub fn capacity(self: *Self) usize {
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return self.nums_capacity;
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return self.numsCapacity;
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}
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// 访问元素
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@@ -1768,7 +1768,7 @@ comments: true
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if (self.size() == self.capacity()) try self.extendCapacity();
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self.nums[self.size()] = num;
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// 更新元素数量
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self.num_size += 1;
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self.numSize += 1;
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}
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// 中间插入元素
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@@ -1783,7 +1783,7 @@ comments: true
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}
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self.nums[index] = num;
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// 更新元素数量
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self.num_size += 1;
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self.numSize += 1;
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}
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// 删除元素
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@@ -1796,30 +1796,30 @@ comments: true
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self.nums[j] = self.nums[j + 1];
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}
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// 更新元素数量
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self.num_size -= 1;
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self.numSize -= 1;
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// 返回被删除元素
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return num;
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}
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// 列表扩容
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pub fn extendCapacity(self: *Self) !void {
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// 新建一个长度为原数组 extendRatio 倍的新数组,并将原数组拷贝到新数组
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var newCapacity = self.capacity() * self.extend_ratio;
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// 新建一个长度为 size * extendRatio 的数组,并将原数组拷贝到新数组
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var newCapacity = self.capacity() * self.extendRatio;
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var extend = try self.mem_allocator.alloc(T, newCapacity);
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std.mem.set(T, extend, @as(T, 0));
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@memset(extend, @as(T, 0));
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// 将原数组中的所有元素复制到新数组
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std.mem.copy(T, extend, self.nums);
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self.nums = extend;
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// 更新列表容量
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self.nums_capacity = newCapacity;
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self.numsCapacity = newCapacity;
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}
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// 将列表转换为数组
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pub fn toArray(self: *Self) ![]T {
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// 仅转换有效长度范围内的列表元素
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var nums = try self.mem_allocator.alloc(T, self.size());
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std.mem.set(T, nums, @as(T, 0));
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for (nums) |*num, i| {
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@memset(nums, @as(T, 0));
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for (nums, 0..) |*num, i| {
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num.* = self.get(i);
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}
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return nums;
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