Source File
	time.go

Belonging Package
	go101.org/nstd

package nstd

import (
	"log"
	"time"
)

// ElapsedTimeLogFunc returns a function which prints the duration elapsed
// since the time the function is invoked.
//
// Use example:
//
//	logElapsedTime := nstd.ElapsedTimeLogFunc("")
//	... // do task 1
//	logElapsedTime("task 1:")
//	... // do task 1
//	logElapsedTime("task 2:")
func ElapsedTimeLogFunc(commonPrefix string) func(prefix string) bool {
	var x string
	if commonPrefix != "" {
		x = " "
	}
	var start = time.Now()
	return func(prefix string) bool {
		var y string
		if commonPrefix != "" {
			y = " "
		}
		log.Printf("%s%s%s%s%s", commonPrefix, x, prefix, y, time.Since(start))
		return true
	}
}

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