Stop fighting over food. Use a random algorithm to decide which restaurant to order from.

Author: manishrjain

food/.gitignore

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+/food

food/main.go

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+package main
+
+import (
+	"bytes"
+	"encoding/csv"
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"math/rand"
+	"os"
+	"time"
+
+	"github.com/dgraph-io/dgraph/x"
+)
+
+var home = os.Getenv("GOPATH")
+var fpath = flag.String("rest",
+	home+"/src/github.com/dgraph-io/dgraph/food/rest.csv",
+	"File path of restaurants file")
+
+type Restaurant struct {
+	Name    string
+	Cuisine string
+}
+
+func main() {
+	flag.Parse()
+	rand.Seed(time.Now().UnixNano())
+
+	fmt.Printf("Reading from file: %s\n\n", *fpath)
+	data, err := ioutil.ReadFile(*fpath)
+	x.Checkf(err, "Unable to read restaurant file: %q", fpath)
+	reader := csv.NewReader(bytes.NewReader(data))
+
+	rests := make([]Restaurant, 0, 30)
+	for {
+		fields, err := reader.Read()
+		if err == io.EOF {
+			break
+		}
+		x.Checkf(err, "Unable to read fields")
+		if len(fields) < 2 {
+			continue
+		}
+		r := Restaurant{Name: fields[0], Cuisine: fields[1]}
+		rests = append(rests, r)
+	}
+	x.AssertTruef(len(rests) >= 5, "Can't parse even five restaurants. Found: %d", len(rests))
+
+	fmt.Printf("Choosing restaurant for 5 days from %d entries:\n", len(rests))
+
+	var last Restaurant
+	chosen := make(map[int]struct{})
+	for len(chosen) < 5 {
+		i := rand.Intn(len(rests))
+		if _, found := chosen[i]; found {
+			continue
+		}
+		this := rests[i]
+		if last.Cuisine == this.Cuisine {
+			continue
+		}
+
+		// Store this choice.
+		chosen[i] = struct{}{}
+		last = this
+
+		fmt.Printf("Day [%d] Restaurant: %20s Cuisine: %10s\n", len(chosen), this.Name, this.Cuisine)
+	}
+}

food/rest.csv

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+Maya Da Dhaba, Indian
+Hari's Vegetarian, Indian
+Alex Lee Kitchen, Singaporean
+Zambrero, Mexican
+Dominos Pizza, Italian
+Chur Burger, Australian
+BL Burgers, Australian
+Ribs & Burgers, Australian
+Thanon Khao San, Thai
+Red Elephant House, Thai