How to Retrieve the Date Range for a Given Week Number in Go?

Retrieving Date Range by Week Number in Go

Introduction:

Obtaining the week number using Golang's time.ISOWeek() function is a common task. However, determining the date range corresponding to a specific week number can be challenging without the help of a dedicated function. This article explores a custom solution to this problem.

Solution:

WeekStart() Function:

We define a function called WeekStart() to find the start date of a given week. We begin by setting the time to the middle of the year (July 1st). Then, we adjust the date to Monday, the start of the week, and calculate the difference between the current week and the target week. Finally, we adjust the date forward by multiplying the week difference by 7 to obtain the start date of the specified week.

WeekRange() Function:

To obtain the complete date range of a week, we create the WeekRange() function. This function utilizes the WeekStart() function to determine the start date and then adds 6 days to get the end date of the week. The result is a tuple containing both the start and end dates of the specified week.

Testing:

To demonstrate the functionality of these functions, we provide test cases and print the output. The results show that the WeekRange() function correctly provides the start and end dates for different weeks in various years.

Benefits of Custom Implementation:

• Handles out-of-range weeks by wrapping around, making it robust for various input scenarios.
• Provides both start and end dates, offering comprehensive date range information for each week.

With these custom functions, we can effortlessly retrieve the date range corresponding to a given week number in Golang, simplifying date-related calculations and manipulations.

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