README.md

go-cartesian-product

a package for building cartesian products in golang

keep in mind, that because how golang handles maps your results will not be "in order"

Installation

In order to start, go get this repository:

go get github.com/schwarmco/go-cartesian-product

Usage

import (
    "fmt"
    "github.com/schwarmco/go-cartesian-product"
)

func main() {
    
    a := []interface{}{1,2,3}
    b := []interface{}{"a","b","c"}

    c := cartesian.Iter(a, b)

    // receive products through channel
    for product := range c {
        fmt.Println(product)
    }

    // Unordered Output:
    // [1 c]
    // [2 c]
    // [3 c]
    // [1 a]
    // [1 b]
    // [2 a]
    // [2 b]
    // [3 a]
    // [3 b]
}

Working with Types

Because you are giving interfaces to Iter() and golang doesn't support mixed-type-maps (which is why i created this package) you have to assert types, when you do function-calls or something like that:

func someFunc(a int, b string) {
    // some code
}

// ...

for product := range c {
    someFunc(product[0].(int), product[1].(string))
}