move to 2020 fodler

2020/solutions/4/README.md

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+# 4
+
+This one was a lot of parsing, but nothing regexp can't do.
+The first is quite straight forward, just check that all but `cid` are present.
+
+The second was a bit of validation for each field, but again some simple regexp and number checking and the job is done 🙂
+
+<details>
+  <summary>Solutions</summary>
+  <ol>
+    <li>206</li>
+    <li>123</li>
+  </ol>
+</details>

2020/solutions/4/go/main.go

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+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"regexp"
+	"strconv"
+	"strings"
+
+	k "github.com/wesovilabs/koazee"
+)
+
+type tPassport = map[string]string
+
+func stringBetween(s string, min, max int) bool {
+	num, _ := strconv.Atoi(s)
+	return min <= num && num <= max
+}
+
+func verifyPassport(passport tPassport) (bool, bool) {
+	requiredKeys := k.StreamOf([]string{"byr", "iyr", "eyr", "hgt", "hcl", "ecl", "pid"})
+	eyeColors := k.StreamOf([]string{"amb", "blu", "brn", "gry", "grn", "hzl", "oth"})
+
+	// Simple
+	counted := 0
+	for k := range passport {
+		if k == "cid" {
+			continue
+		}
+		included, _ := requiredKeys.Contains(k)
+		if !included {
+			return false, false
+		}
+		counted++
+	}
+	if counted < 7 {
+		return false, false
+	}
+
+	// Complex
+	if !stringBetween(passport["byr"], 1920, 2002) || !stringBetween(passport["iyr"], 2010, 2020) || !stringBetween(passport["eyr"], 2020, 2030) {
+		return true, false
+	}
+
+	tmp := []rune(passport["hgt"])
+	hgtLen := len(tmp)
+	hgt, _ := strconv.Atoi(string(tmp[0 : hgtLen-2]))
+	unit := string(tmp[hgtLen-2:])
+	if unit != "cm" && unit != "in" {
+		return true, false
+	}
+	if unit == "cm" && (hgt < 150 || hgt > 193) {
+		return true, false
+	}
+	if unit == "in" && (hgt < 59 || hgt > 76) {
+		return true, false
+	}
+
+	if !regexp.MustCompile(`^#[\dabdcdef]{6}$`).MatchString(passport["hcl"]) {
+		return true, false
+	}
+	if !regexp.MustCompile(`^\d{9}$`).MatchString(passport["pid"]) {
+		return true, false
+	}
+
+	ecl, _ := eyeColors.Contains(passport["ecl"])
+	if !ecl {
+		return true, false
+	}
+
+	return true, true
+}
+
+func main() {
+	data, _ := ioutil.ReadFile("./solutions/4/data.txt")
+	passportsRaw := strings.Split(strings.TrimSpace(string(data)), "\n\n")
+	passports := []tPassport{}
+
+	re := regexp.MustCompile(`\n|\s`)
+	for _, passportRaw := range passportsRaw {
+		passport := tPassport{}
+		entries := re.Split(passportRaw, -1)
+		for _, entry := range entries {
+			split := strings.Split(entry, ":")
+			passport[split[0]] = split[1]
+		}
+		passports = append(passports, passport)
+	}
+
+	validSimple := 0
+	validComplex := 0
+	for _, passport := range passports {
+		simple, complex := verifyPassport(passport)
+		if simple {
+			validSimple++
+		}
+		if complex {
+			validComplex++
+		}
+	}
+	fmt.Println("Simple Validation:\t", validSimple)
+	fmt.Println("Extended Validation:\t", validComplex)
+}

2020/solutions/4/python/main.py

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+from os.path import join, dirname
+import re
+
+
+def validate_chunk(chunk, extended=False):
+    parts = re.split(' |\n', chunk.strip())
+    password = dict(map(lambda p: p.split(":"), parts))
+
+    required = ['byr', 'iyr', 'eyr', 'hgt', 'hcl', 'ecl', 'pid']
+    if not all(item in password.keys() for item in required):
+        return False
+
+    if not extended:
+        return True
+
+    if not 1920 <= int(password['byr']) <= 2002:
+        return False
+    if not 2010 <= int(password['iyr']) <= 2020:
+        return False
+    if not 2020 <= int(password['eyr']) <= 2030:
+        return False
+
+    tmp = password['hgt']
+    hgt = int(tmp[:-2])
+    unit = tmp[-2:]
+    if not unit in ['cm', 'in']:
+        return False
+    if unit == 'cm' and not 150 <= hgt <= 193:
+        return False
+    if unit == 'in' and not 59 <= hgt <= 76:
+        return False
+
+    if not re.match(r'^#[\dabcdef]{6}$', password['hcl']):
+        return False
+    if not re.match(r'^\d{9}$', password['pid']):
+        return False
+
+    if password['ecl'] not in ['amb', 'blu', 'brn', 'gry', 'grn', 'hzl', 'oth']:
+        return False
+    return True
+
+
+data = join(dirname(__file__), '../data.txt')
+with open(data) as f:
+    chunks = re.split('\n\n+', f.read().strip())
+    total_simple = 0
+    total_extended = 0
+    for chunk in chunks:
+        total_simple += int(validate_chunk(chunk))
+        total_extended += int(validate_chunk(chunk, extended=True))
+    print(f'Simple Validation:\t{total_simple}')
+    print(f'Extended Validation:\t{total_extended}')