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@ -47,13 +47,13 @@ func GetAllCityWeatherData(timeOut time.Duration) ([]*WeatherData, error) {
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// 创建一个携带cancel的context
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// 创建一个携带cancel的context
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ctx, cancel := context.WithTimeout(context.Background(), timeOut)
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ctx, cancel := context.WithTimeout(context.Background(), timeOut)
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defer cancel() // 确保所有路径都调用cancel
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defer cancel() // 确保所有路径都调用cancel
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list := make([]*WeatherData, 0)
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// 初始化一个ErrGroup对象
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// 初始化一个ErrGroup对象
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g, ctx := errgroup.WithContext(ctx)
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g, ctx := errgroup.WithContext(ctx)
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// 城市列表
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// 城市列表
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cities := []string{"New York", "Tokyo", "Berlin", "Paris", "Beijing"}
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cities := []string{"New York", "Tokyo", "Berlin", "Paris", "Beijing"}
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list := make([]*WeatherData, 0, len(cities))
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// 循环启动goroutine来获取每个城市的天气数据
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// 循环启动goroutine来获取每个城市的天气数据
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for _, city := range cities {
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for _, city := range cities {
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