timekit

Convenience functions to make your life easier when using with Golang's time package.

Installation

In your Golang project, please run:

go get github.com/bartmika/timekit

Documentation

All documentation can be found here.

Example Usage

The following usage section will show a few interesting solutions that can be solved by this library.

How do I get the first day of this year in Golang?

import (
    "fmt"

    "github.com/bartmika/timekit"
)

startOfYearDate := timekit.FirstDayOfThisYear(time.Now)
fmt.Println(startOfYearDate)

If you have interest in finding out more functions for getting different date/times then checkout timekit.go file.

How do parse JavaScript time into Golang time?

In your browser console, try writing this:

// EXAMPLE JAVASCRIPT CODE
var dt = new Date()
console.log(dt.getTime()) // 1643082322380
console.log(dt) // Mon Jan 24 2022 22:45:22 GMT-0500 (Eastern Standard Time)

Then try this in your go source file:

import (
    "fmt"

    "github.com/bartmika/timekit"
)

jsTime := int64(1643082322380)
goTime := ParseJavaScriptTime(jsTime)
fmt.Println(goTime)

How get a range of date/times between two dates?

import (
    "fmt"

    "github.com/bartmika/timekit"
)

start := time.Date(2022, 1, 7, 1, 0, 0, 0, loc) // Jan 7th 2022
end := time.Date(2022, 1, 10, 1, 0, 0, 0, loc)  // Jan 10th 2022
dts := RangeFromTimeStepper(start, end, 0, 0, 1, 0, 0, 0) // Step by day.
fmt.Println(dts) // Output:
                 // Jan 7th 2022
                 // Jan 8th 2022
                 // Jan 9th 2022
                 // Jan 10th 2022

If you have interest in finding out more range functions then checkout range.go and timestepper.go files.

How get iterate between two dates?

import (
    "fmt"

    "github.com/bartmika/timekit"
)

loc := time.UTC                                 // closure can be used if necessary
start := time.Date(2022, 1, 7, 1, 0, 0, 0, loc) // Jan 7th 2022
end := time.Date(2022, 1, 10, 1, 0, 0, 0, loc)  // Jan 10th 2022
ts := NewTimeStepper(start, end, 0, 0, 1, 0, 0, 0)

var actual time.Time
running := true
for running {
    // Get the value we are on in the timestepper.
    actual = ts.Get()

    log.Println(actual) // For debugging purposes only.

    // Run our timestepper to get our next value.
    ts.Next()

    running = ts.Done() == false
}

If you have interest in finding out iterating between two date/times then checkout timestepper.go file.

Contributing

Found a bug? Want a feature to improve your developer experience when dealing with the time package? Please create an issue.

License

Made with ❤️ by Bartlomiej Mika.
The project is licensed under the ISC License.

Resource used:

• Stubbing Time.Now() in golang was a tremendous help in getting me to understand how to unit test with the time.Time package.
• dannav/hhmmss package is used for the Golang hh:mm:ss string to duration conversation method.
• relvacode/iso8601 package is used for dealing with ISO8601 formatted strings.