Error building shortest_path.go

[internetbird]

Hi,

When I try to build shortest_path.go, I get the following error messages:

.\shortest_path.go:54: undefined: nodeDistanceHeap
.\shortest_path.go:72: undefined: nodeDistance
.\shortest_path.go:86: undefined: nodeDistance

I couldn't find any reference to nodeDistanceHeap or nodeDistance in the project. Am I missing something?

[gyuho]

What command did you run to build? goraph is a package to be imported.

Normally you would just import "github.com/gyuho/goraph" in your Go program.

[internetbird]

I just copied the shortest_path.go file to my project and build it with my "main" package using 'go build' command.

the file has the following dependencies:

import (
    "container/heap"
    "fmt"
    "math"
)

which seem to be all ok...

[gyuho]

@internetbird In Go, you need all the files in package goraph workspace. Otherwise you need to copy manually all those structs nodeDistance, and so on.

import (
    "container/heap"
    "fmt"
    "math"
)

those are standard packages, so no need to worry about it.

Just find all these definitions

.\shortest_path.go:54: undefined: nodeDistanceHeap
.\shortest_path.go:72: undefined: nodeDistance
.\shortest_path.go:86: undefined: nodeDistance

in goraph and copy to your project.

Repeat this until it compiles.

[internetbird]

@gyuho , thanks. I did a GitHub search : "nodeDistanceHeap in:file"
and I found some references in the Readme.md file of your learn repository

I will copy the definitions to my file and hopefully it will work.

I think it is a good idea to also add the definitions to this repository...

[gyuho]

All definitions are defined in this repository. Go allows to separate a single package code into different files. As you find so, you just need to copy those to your project and see if it compiles.

I am closing this, but if you have more questions feel free to ask here or file a new issue.

Thanks!