Golang: Verify string is a valid hex string?

php editor Xiaoxin is here to introduce a method to verify whether a string is a valid hexadecimal string. In programming, we often encounter the need to verify whether input conforms to a specific format, and verification of hexadecimal strings is one of them. This article will introduce you to a simple and effective method to determine whether a string is a valid hexadecimal string. By mastering this skill, you can better handle related programming issues and improve development efficiency. Let us take a look at the specific implementation method below!

Question content

I have a structure:

type name struct {
    hexid string
    age uint8
}

What is the simplest way to check if the hexid field is a valid hex string? If not - an error will occur.

For example:

var n Name
n.hexID = "Hello World >)" // not a valid hex
n.hexID = "aaa12Eb9990101010101112cC" // valid hex

Or maybe there is a struct tag somewhere?

Solution

How about this

regexp.MatchString("[^0-9A-Fa-f]", n.hexID)

True if the string contains illegal hexadecimal characters

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