Phasmobot/ghostTypes.go

package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
)

func setupGhostTypes() {
	var c []Spookster
	confFile, _ := ioutil.ReadFile("ghosts.json")
	err := json.Unmarshal([]byte(confFile), &c)
	if err != nil {
		return
	}
	ghostTypes = c
	fmt.Printf("Loaded %+v ghost types\n", len(ghostTypes))
}

func (g *Game) EliminateGhosts(newEvidence int) {
	var types []Spookster
	var evidence []int
	for _, v := range g.PossibleGhosts {
		possible := false
		for _, e := range v.Evidence {
			if e == newEvidence {
				possible = true
			}
		}
		if possible {
			types = append(types, v)
			evidence = append(evidence, v.Evidence...)
		}
	}
	g.PossibleGhosts = types
	g.PossibleEvidence = removeDuplicateValues(evidence)

	games[g.Identifier] = *g
}

// https://www.geeksforgeeks.org/how-to-remove-duplicate-values-from-slice-in-golang/
func removeDuplicateValues(intSlice []int) []int {
	keys := make(map[int]bool)
	list := []int{}

	// If the key(values of the slice) is not equal
	// to the already present value in new slice (list)
	// then we append it. else we jump on another element.
	for _, entry := range intSlice {
		if _, value := keys[entry]; !value {
			keys[entry] = true
			list = append(list, entry)
		}
	}
	return list
}