this.player.on("statistics_info", function (res) { if (this.lastDecodedFrame == 0) { this.lastDecodedFrame = res.decodedFrames; return; } if (this.lastDecodedFrame != res.decodedFrames) { this.lastDecodedFrame = res.decodedFrames; } else { this.lastDecodedFrame = 0; if (this.player) { this.player.pause(); this.player.unload(); this.player.detachMediaElement(); this.player.destroy(); this.player= null; this.createPlayer(videoElement, this.url); } } });

这是一段 JavaScript 代码，使用了某个播放器（可能是 video.js）的 API。当播放器触发 "statistics_info" 事件时，代码会检查最近解码的帧数（res.decodedFrames）是否与之前的帧数相同。如果不同，代码会更新最近解码的帧数。如果相同，则代码会暂停播放，卸载播放器，删除播放器的媒体元素，销毁播放器并创建一个新的播放器。这段代码可能是为了解决某些播放器问题而编写的。

相关问题

changeClickStatus() { //试下 this.clickStatus = !this.clickStatus; this.sliderIsDisabled = !this.sliderIsDisabled; if (!this.clickStatus == false) { this.headStatus = 3; //未选中状态 this.backDisabledBtn = true; this.forwardDisabledBtn = true; this.removeMoveNumber(); } else { this.headStatus = 1; if ( this.sliderValue <= this.sgfList.totalHead && this.sliderValue > 0 ) { this.backDisabledBtn = false; } else { this.backDisabledBtn = true; } if (this.sliderValue == this.sgfList.totalHead) { this.forwardDisabledBtn = true; } else { this.forwardDisabledBtn = false; } let board = this.player.board; for (let i = 1; i < this.nodes.length; i++) { let item = this.nodes[i]; board.removeObject({ type: "LB", text: i, x: item.x, y: item.y, }); } } //开启编辑功能 this._editable = this._editable || new WGo.Player.Editable(this.player, this.player.board); this._editable.set(!this._editable.editMode); },怎么优化这段代码

这段代码可以进行如下优化：

1. 将 `!this.clickStatus == false` 改为 `this.clickStatus`，以提高代码的可读性。

2. 将 `this.headStatus` 的赋值移到 `if` 语句块中，避免重复赋值。

3. 将 `this.sliderValue <= this.sgfList.totalHead && this.sliderValue > 0` 提取出来，避免重复计算。

4. 将 `let board = this.player.board` 的赋值提取出来，避免重复获取。

优化后的代码如下：

changeClickStatus() {
  this.clickStatus = !this.clickStatus;
  this.sliderIsDisabled = !this.sliderIsDisabled;
  
  if (this.clickStatus) {
    this.headStatus = 3; //未选中状态
    this.backDisabledBtn = true;
    this.forwardDisabledBtn = true;
    this.removeMoveNumber();
  } else {
    const sliderInRange = this.sliderValue > 0 && this.sliderValue <= this.sgfList.totalHead;
    this.headStatus = 1;
    this.backDisabledBtn = !sliderInRange;
    this.forwardDisabledBtn = this.sliderValue === this.sgfList.totalHead;
    
    const board = this.player.board;
    for (let i = 1; i < this.nodes.length; i++) {
      const item = this.nodes[i];
      board.removeObject({
        type: "LB",
        text: i,
        x: item.x,
        y: item.y,
      });
    }
  }
  
  //开启编辑功能
  this._editable = this._editable || new WGo.Player.Editable(this.player, this.player.board);
  this._editable.set(!this._editable.editMode);
}

def get_damage(self,player,attack_type): if self.vulnerable: self.hit_sound.play() self.direction = self.get_player_distance_direction(player)[1] if attack_type == 'weapon': self.health -= player.get_full_weapon_damage() else: self.health -= player.get_full_magic_damage() self.hit_time = pygame.time.get_ticks() self.vulnerable = False

这段代码是一个方法，名为`get_damage`，它接受两个参数：`player`和`attack_type`。该方法用于让敌人遭受攻击并减少相应的生命值。如果敌人处于易受攻击状态（即`self.vulnerable`为`True`），则播放击打音效（`self.hit_sound.play()`），设定敌人的朝向（`self.direction`），根据攻击类型（武器或魔法）减少相应的生命值（`self.health -= player.get_full_weapon_damage()`或`self.health -= player.get_full_magic_damage()`），记录敌人受击的时间（`self.hit_time = pygame.time.get_ticks()`），并将敌人的易受攻击状态设为`False`（`self.vulnerable = False`）。