41 lines
921 B
Go
41 lines
921 B
Go
package interval
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func (intvls *intervals) Merge() []*Interval {
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if intvls.MergeList == nil {
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intvls.MergeList = intvls.calculateMerged()
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}
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return intvls.MergeList
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}
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func (intvls *intervals) calculateMerged() []*Interval {
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intvls.Sort()
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list := []*Interval{}
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if len(intvls.Intervals) == 0 {
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return list
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}
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var lastLow int
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var lastHigh int
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for i, intvl := range intvls.Intervals {
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if i == 0 {
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lastLow = intvl.Low
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lastHigh = intvl.High
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continue
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}
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if isLowInBetween(intvl.Low, intvl.High, lastLow, lastHigh) || isHighInBetween(intvl.Low, intvl.High, lastLow, lastHigh) {
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if intvl.Low < lastLow {
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lastLow = intvl.Low
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}
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if intvl.High > lastHigh {
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lastHigh = intvl.High
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}
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continue
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}
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list = append(list, &Interval{Low: lastLow, High: lastHigh})
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lastLow = intvl.Low
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lastHigh = intvl.High
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}
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list = append(list, &Interval{Low: lastLow, High: lastHigh})
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return list
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}
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