How to convert a YYYYMMDD string to a valid date in Go?

Convert YYYYMMDD String to a Valid Date in Go

The task is to convert a YYYYMMDD string to a valid date in Go. For instance, "20101011" to "2010-10-11".

Attempt and Failure:

Attempts were made using both:

1. now := time.Now().Format("20101011")
2. date, _ := time.Parse("20101011", "20101011")

However, neither yielded positive results.

Solution:

The time package offers a range of predefined layouts that can be utilized in Time.Format() and Time.Parse() methods. For the YYYYMMDD format, the corresponding layout string is "20060102". To obtain the YYYY-MM-DD format, use the layout string "2006-01-02".

Implementation:

<code class="go">package main

import (
    "fmt"
    "time"
)

func main() {
    now := time.Now()
    fmt.Println(now) // Output: 2009-11-10 23:00:00 +0000 UTC

    // Convert the current time to a string in YYYYMMDD format
    date := now.Format("20060102") 
    fmt.Println(date) // Output: 20091110

    // Convert the current time to a string in YYYY-MM-DD format
    date = now.Format("2006-01-02")
    fmt.Println(date) // Output: 2009-11-10

    // Parse a string in YYYYMMDD format back into a date
    date2, err := time.Parse("20060102", "20101011")
    if err == nil {
        fmt.Println(date2) // Output: 2010-10-11 00:00:00 +0000 UTC
    }
}</code>

Output:

2009-11-10 23:00:00 +0000 UTC
20091110
2009-11-10
2010-10-11 00:00:00 +0000 UTC

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