nickwitha_k (he/him)

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  • 183 Comments
Joined 1 year ago
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Cake day: July 16th, 2023

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  • So what it’s really like is only having to do half the work?

    If it’s automating the interesting problem solving side of things and leaving just debugging code that one isn’t familiar with, I really don’t see value to humanity in such use cases. That’s really just making debugging more time consuming and removing the majority of fulfilling work in development (in ways that are likely harder to maintain and may be subject to future legal action for license violations). Better to let it do things that it actually does well and keep engaged programmers.













  • Kinda. nil is a weird value in Go, not quite the same as null or None in JS and Python, respectively. A nil value may or may not be typed and it may or may not be comparable to similar or different types. There is logical consistency to where these scenarios can be hit but it is pretty convoluted and much safer, with fewer footguns to check for nil values before comparison.

    I’m other words, in Go (nil == nil) || (nil != nil), depending on the underlaying types. One can always check if a variable has a nil value but may not be able to compare variables if one or more have a nil value. Therefore, it is best to first check for nil values to protect against errors that failure to execute comparisons might cause (anything from incorrect outcome to panic).

    ETA: Here’s some examples

    // this is always possible for a variable that may have a nil value. 
    a != nil || a == nil
    
    a = nil
    b = nil
    // This may or may not be valid, depending on the underlying types.
    a != b || a == b
    
    // Better practice for safety is to check for nil first
    if a != nil && b != nil {
        if a == b {
            fmt.Println("equal")
        } else {
            fmt.Println("not equal")
        }
    } else {
        fmt.Println("a and/or b is nil and may not be comparable")
    }
    




  • IIRC, a nil value can be checked against a literal successfully but not against another nil value. Say you want to check for equality of two vars that could be nil. You just need an extra if statement to ensure that you are not trying to compare nil and nil or nil and a non-nil value (that’ll give you a type error or NPE):

    var a *string
    var b *string
    
    ...
    if a != nil && b != nil {
      if a == b {
        fmt.Println("Party!")
      } else {
        fmt.Println("Also Party!")
    }