How Can We Optimize Go Code for Finding Enclosing Intervals in Different Collection Types?

Optimizing Code for Common Collection Slice Behavior

In the context of working with collections of half-open intervals, such as clocks and periods, a primary concern is finding the enclosing interval for a given time for both types of intervals. This repetitive task calls for an efficient way to define common behavior for these collections.

Conversion Considerations

One approach involves converting one type of slice into another. However, the recommended method is to create a new slice and convert each item explicitly. For instance, to convert a slice of ClockIntervals into HalfOpenIntervals:

func ToIntervalsFromClockIntervals(clockIntervals []ClockInterval) HalfOpenIntervals {
    intervals := make(HalfOpenIntervals, 0, len(clockIntervals))
    for _, clockInterval := range clockIntervals {
        intervals = append(intervals, clockInterval)
    }
    return intervals
}

Leveraging Composition

An alternative approach is to utilize composition to avoid duplicating code. Create the basic structure BasicInterval, which contains the implementation of the sorting and GetEnclosingInterval functions. ClockIntervals and PeriodIntervals inherit BasicInterval and have convenience methods that point to internal slices.

Avoiding Overgeneralization

It's important to note that overly generalizing can introduce complexity and reduce code readability in Go. In some cases, it may be more pragmatic to accept some duplication of code for different types. This approach can often lead to cleaner, more maintainable code in the long run.

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