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39 lines
618 B
Go
39 lines
618 B
Go
package src
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import (
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"fmt"
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"log"
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"time"
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)
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func printExecTime(message string, args ...any) func() {
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msg := fmt.Sprintf(message, args...)
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start := time.Now()
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log.Printf("Running %s", msg)
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return func() {
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log.Printf("%s finished in %s", msg, time.Since(start))
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}
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}
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func Filter[E any](s []E, f func(E) bool) []E {
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s2 := make([]E, 0, len(s))
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for _, e := range s {
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if f(e) {
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s2 = append(s2, e)
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}
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}
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return s2
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}
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// Count returns the number of elements in s that are equal to e.
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func Count[S []E, E comparable](s S, e E) int {
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var n int
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for _, v := range s {
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if v == e {
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n++
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}
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}
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return n
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}
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