Code for day1, 2 in golang

go/2/main.go

@@ -0,0 +1,87 @@
+package main
+
+import (
+    "bufio"
+    "os"
+    "path/filepath"
+    "strings"
+)
+
+var (
+    f = "../../2.input.txt"
+
+    RPS = map[string] int {
+        "X":1,
+        "Y":2,
+        "Z":3,
+        "A":1,
+        "B":2,
+        "C":3,
+    }
+    outcome = map[string] int {
+        "A X":3,
+        "A Y":6,
+        "A Z":0,
+        "B X":0,
+        "B Y":3,
+        "B Z":6,
+        "C X":6,
+        "C Y":0,
+        "C Z":3,
+    }
+    // A:Rock B:Paper C:Scissor
+    // X:lose Y:draw Z:win
+    rRPS = map[string] string {
+        "A X":"C",
+        "A Y":"A",
+        "A Z":"B",
+        "B X":"A",
+        "B Y":"B",
+        "B Z":"C",
+        "C X":"B",
+        "C Y":"C",
+        "C Z":"A",
+    }
+    rOutcome = map[string] int {
+        "X":0,
+        "Y":3,
+        "Z":6,
+    }
+)
+
+func must(e error) {
+    if e != nil {
+        panic(e)
+    }
+}
+
+func Score(line string) int {
+    sp := strings.Split(line, " ")
+    return RPS[sp[1]] + outcome[line]
+}
+
+func RealScore(line string) int {
+    sp := strings.Split(line, " ")
+    throw := rRPS[line]
+    return RPS[throw] + rOutcome[sp[1]]
+}
+
+func main() {
+    fp, err:= filepath.Abs(f)
+    must(err)
+    rf, err := os.Open(fp)
+    must(err)
+    s := bufio.NewScanner(rf)
+    s.Split(bufio.ScanLines)
+
+    totScore := 0
+    totRealScore := 0
+    for s.Scan() {
+        l := s.Text()
+        totScore = Score(l) + totScore
+        totRealScore = RealScore(l) + totRealScore
+    }
+
+    println("part 1 score:", totScore)
+    println("part 2 score:", totRealScore)
+}