How do I remove the \'m\' field from a Go timestamp?

Understanding the "m" in Go Timestamps

In Go, timestamps obtained using time.Now() can include a trailing field of the form "m=xx.xxxx...", where "m" represents the monotonic clock reading. The monotonic clock is a type of clock that measures elapsed time without being affected by system clock changes or synchronization.

Removing the "m" Field from Timestamps

The canonical approach to remove the "m" field from timestamps is to utilize the Round function:

<code class="go">t := t.Round(0)</code>

Round takes a duration as its argument and returns a Time object rounded to the nearest multiple of the provided duration. Passing a zero value for the duration effectively strips the "m" field while preserving the other components of the timestamp.

Alternative Methods for Obtaining Timestamps Without "m"

In addition to using Round, there are alternative ways to obtain timestamps without the "m" field:

• Parse from a Custom Format String: You can use the Parse function to obtain a Time object from a custom time format string that does not include the "m" field.
• Use Third-Party Libraries: Some third-party libraries provide functions for parsing and formatting timestamps in specific ways, including without the "m" field.

Example of Removing the "m" Field

Consider the following example:

<code class="go">import "time"

func main() {
    t := time.Now()
    fmt.Println(t) // 2009-11-10 23:00:00 +0000 UTC m=+0.000000001
    t = t.Round(0)
    fmt.Println(t) // 2009-11-10 23:00:00 +0000 UTC
}</code>

In this example, we obtain the current timestamp using time.Now() and print it. The timestamp includes the "m" field. Subsequently, we use Round to strip the "m" field and print the resulting Time object. The output shows the original timestamp with the "m" field and the modified timestamp without the "m" field.

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