61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
package gobot
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import (
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"crypto/rand"
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"math"
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"math/big"
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"time"
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)
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// Every triggers f every `t` time until the end of days.
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func Every(t time.Duration, f func()) {
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c := time.Tick(t)
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// start a go routine to not bloc the function
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go func() {
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for {
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// wait for the ticker to tell us to run
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<-c
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// run the passed function in another go routine
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// so we don't slow down the loop.
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go f()
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}
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}()
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}
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// After triggers the passed function after `t` duration.
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func After(t time.Duration, f func()) {
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time.AfterFunc(t, f)
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}
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func Publish(e *Event, val interface{}) {
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e.Write(val)
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}
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func On(e *Event, f func(s interface{})) {
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e.Callbacks = append(e.Callbacks, callback{f, false})
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}
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func Once(e *Event, f func(s interface{})) {
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e.Callbacks = append(e.Callbacks, callback{f, true})
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}
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func Rand(max int) int {
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i, _ := rand.Int(rand.Reader, big.NewInt(int64(max)))
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return int(i.Int64())
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}
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func FromScale(input, min, max float64) float64 {
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return (input - math.Min(min, max)) / (math.Max(min, max) - math.Min(min, max))
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}
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func ToScale(input, min, max float64) float64 {
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i := input*(math.Max(min, max)-math.Min(min, max)) + math.Min(min, max)
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if i < math.Min(min, max) {
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return math.Min(min, max)
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} else if i > math.Max(min, max) {
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return math.Max(min, max)
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} else {
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return i
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}
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}
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