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back_end.go
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back_end.go
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package main
import (
"fmt"
"math"
"os"
"strconv"
"strings"
)
type user struct {
firstName string
lastName string
gender string
age int
sport string
lvl string
dist int
}
func read(db string) []user {
var ret []user
d, err := os.ReadFile(db)
if err != nil {
panic(err)
}
rows := strings.Split(string(d), "\n")
for _, x := range rows {
if len(strings.Trim(x, "\n")) == 0 {
return ret
}
y := strings.Split(x, ",")
age, _ := strconv.Atoi(y[4])
dist, _ := strconv.Atoi(y[5])
ret = append(ret, user{y[0], y[1], y[3], age, y[2], y[6], dist})
}
return ret
}
func stddump(u []user) {
for _, x := range u {
fmt.Printf("%s,%s,%s,%s,%d,%d,%s\n", x.firstName, x.lastName, x.sport, x.gender, x.age, x.dist, x.lvl)
}
}
func fdump(u []user, f string) {
out, err := os.OpenFile(f, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
panic(err)
}
for _, x := range u {
_, err := fmt.Fprintf(out, "%s,%s,%s,%s,%d,%d,%s\n", x.firstName, x.lastName, x.sport, x.gender, x.age, x.dist, x.lvl)
if err != nil {
panic(err)
}
}
}
type testuser struct {
firstName string
lastName string
gender string
age int
sport string
lvl string
dist int
}
func isSimilar(u1 testuser, u2 user, ageThresh, distThresh int) bool {
ageDiff := math.Abs(float64(u1.age - u2.age))
distDiff := math.Abs(float64(u1.dist - u2.dist))
return u1.sport == u2.sport && (u1.lvl == u2.lvl || (ageDiff <= float64(ageThresh) && distDiff <= float64(distThresh)))
}
func matchedData(u []user, testUs testuser, age int, dist int) []user {
var similarUsers []user
for _, i := range u {
if isSimilar(testUs, i, age, dist) {
similarUsers = append(similarUsers, i)
}
}
return similarUsers
}
func main() {
ageThresh := 5
distThresh := 80
test := testuser{
firstName: "Mike",
lastName: "Hunter",
gender: "Male",
age: 29,
sport: "Baseball",
lvl: "Professional",
dist: 90,
}
users := read("fake2.csv")
simUser := matchedData(users, test, ageThresh, distThresh)
stddump(simUser)
}