56 lines
1 KiB
Go
56 lines
1 KiB
Go
package seq
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import (
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"math"
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"time"
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"github.com/wcharczuk/go-chart/util"
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)
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func round(input float64, places int) (rounded float64) {
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if math.IsNaN(input) {
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return 0.0
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}
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sign := 1.0
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if input < 0 {
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sign = -1
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input *= -1
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}
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precision := math.Pow(10, float64(places))
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digit := input * precision
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_, decimal := math.Modf(digit)
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if decimal >= 0.5 {
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rounded = math.Ceil(digit)
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} else {
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rounded = math.Floor(digit)
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}
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return rounded / precision * sign
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}
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func f64i(value float64) int {
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r := round(value, 0)
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return int(r)
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}
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// SetOfTime is a simple hash set for timestamps as float64s.
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type SetOfTime map[float64]bool
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// Add adds the value to the hash set.
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func (sot SetOfTime) Add(tv time.Time) {
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sot[util.Time.ToFloat64(tv)] = true
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}
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// Has returns if the set contains a given time.
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func (sot SetOfTime) Has(tv time.Time) bool {
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_, hasValue := sot[util.Time.ToFloat64(tv)]
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return hasValue
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}
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// Remove removes the value from the set.
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func (sot SetOfTime) Remove(tv time.Time) {
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delete(sot, util.Time.ToFloat64(tv))
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}
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