53 lines
919 B
Go
53 lines
919 B
Go
package types
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// Super basic Series type that simply holds the float64 data
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// with size limit (the only difference compare to float64slice)
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type Queue struct {
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SeriesBase
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arr []float64
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size int
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}
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func NewQueue(size int) *Queue {
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out := &Queue{
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arr: make([]float64, 0, size),
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size: size,
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}
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out.SeriesBase.Series = out
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return out
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}
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func (inc *Queue) Last(i int) float64 {
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if i < 0 || len(inc.arr)-i-1 < 0 {
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return 0
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}
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return inc.arr[len(inc.arr)-1-i]
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}
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func (inc *Queue) Index(i int) float64 {
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return inc.Last(i)
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}
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func (inc *Queue) Length() int {
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return len(inc.arr)
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}
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func (inc *Queue) Clone() *Queue {
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out := &Queue{
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arr: inc.arr[:],
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size: inc.size,
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}
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out.SeriesBase.Series = out
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return out
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}
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func (inc *Queue) Update(v float64) {
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inc.arr = append(inc.arr, v)
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if len(inc.arr) > inc.size {
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inc.arr = inc.arr[len(inc.arr)-inc.size:]
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}
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}
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var _ UpdatableSeriesExtend = &Queue{}
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