Solution for assignment1.

README.md

@@ -1,12 +1,17 @@
-# Advent of Code 2022 - assignment2 javascript
-## Description
-Assignment2 involves a game of rock paper scissors. The solution uses an enum for rock, paper, scissor values it defines two functions for selecting a winning and losing hand. The winning and losing hand take advantage of the fact that each next value in the rock, paper, scissor trio beats the previous (looping back to rock). For losing it is the other way around. The winning_hand function is also used to determine the score for player. In the GUI there is a checkbox for selecting solution options (part1,part2).
+# Advent of Code 2022 - assignment 1
+This is the first assignment for Advent of Code 2022. The provided solution uses 3 variables: currentScore, highestCalorieScore, currentElf, highestElf.
+It is complexity O(n+m) since it loops through every line exactly once (n) and the iterates for recalculating highscore (m).
+The GUI also provides a checkbox to toggle top3 or top1.
 
-## References
-- https://www.psychologytoday.com/us/blog/the-blame-game/201504/the-surprising-psychology-rock-paper-scissors#:~:text=There%20are%20four%20possible%20outcomes,Douglas%20Walker%20and%20Graham%20Walker.
-- https://www.sohamkamani.com/javascript/enums/
-- https://codingbeautydev.com/blog/javascript-remove-all-whitespace-from-string/#:~:text=To%20remove%20all%20whitespace%20from%20a%20string%20in%20JavaScript%2C%20call,all%20whitespace%20removed%20from%20str%20.
-- https://www.geeksforgeeks.org/how-to-check-a-key-exists-in-javascript-object/#:~:text=There%20are%20mainly%20two%20methods,property%20is%20in%20the%20object.
-- https://stackoverflow.com/questions/5765398/whats-the-best-way-to-convert-a-number-to-a-string-in-javascript
-- https://www.w3schools.com/jsref/jsref_switch.asp
-- https://www.w3schools.com/tags/att_input_type_checkbox.asp
+## Solution description
+Every iteration the score is added to the currentScore. If an empty line is detected we check if currentscore exceeds one of our highestCalorieScore, if yes we assign currentElf to highestElf.
+
+## references
+- https://adventofcode.com/2022/day/1
+- https://stackoverflow.com/questions/17595361/how-to-read-text-line-by-line-in-a-html-text-area
+- https://bobbyhadz.com/blog/javascript-get-value-of-textarea
+- https://stackoverflow.com/questions/154059/how-do-i-check-for-an-empty-undefined-null-string-in-javascript
+- https://www.geeksforgeeks.org/convert-a-string-to-an-integer-in-javascript/#:~:text=In%20JavaScript%20parseInt()%20function,argument%20of%20parseInt()%20function.
+- https://stackoverflow.com/questions/1230233/how-to-find-the-sum-of-an-array-of-numbers
+- https://www.w3schools.com/js/js_break.asp
+- https://2ality.com/2018/12/creating-arrays.html

index.html

@@ -9,7 +9,8 @@
     <p>Assignment:</p>
     <textarea rows="15" cols="50" id="assignment"></textarea>
     <input type="checkbox" id="algorithm"/>
-    <label for="algorithm">Interpret X,Y,Z as Rock Paper Scissor.</label> 
+    <label for="algorithm">TOP 3</label> 
+
     <p>Answer:</p>
     <div id="answer">Provide input first</div>
     <script src="script.js"></script>

script.js

@@ -1,55 +1,9 @@
 const ASSIGNMENT = 'assignment';
 const ANSWER = 'answer';
 const ALGORITHM_CHECKBOX = 'algorithm';
-const ERROR_MESSAGE_NO_SUCH_CHARACTER_IN_RPS = "Non existant character in rock paper scissor game selected: ";
-const ERROR_MESSAGE_TOO_FEW_CHARACTERS_IN_LINE = "Too few characters in line: ";
 const NEWLINE_CHARACTER = '\n';
-const OPTION_LOSE = 'X';
-const OPTION_TIE = 'Y';
-const OPTION_WIN = 'Z';
-
-const RPS = Object.freeze({
-    ROCK: 1,
-    PAPER: 2,
-    SCISSORS: 3,
-
-    /**
-     * Select winning hand for given hand.
-     * @param hand the chosen hand
-     * @return RPS the winning hand
-     */
-    winning_hand: function(hand) {
-        hand++;
-        if(hand > RPS.SCISSORS) {
-            hand = RPS.ROCK;
-        }
-        return hand;
-    },
-
-    /**
-     * Select losing hand for given hand.
-     * @param hand the chosen hand
-     * @return RPS the losing hand
-     */
-    losing_hand: function(hand) {
-        hand--;
-        if(hand < RPS.ROCK) {
-            hand = RPS.SCISSORS;
-        }
-        return hand;
-    }
-});
-const RPS_ALIAS_MAP = Object.freeze({
-    "A": RPS.ROCK,
-    "B": RPS.PAPER,
-    "C": RPS.SCISSORS,
-    "X": RPS.ROCK,
-    "Y": RPS.PAPER,
-    "Z": RPS.SCISSORS,
-})
-const SCORE_LOSE = 0;
-const SCORE_TIE = 3;
-const SCORE_WIN = 6;
+const TOP_1 = 1;
+const TOP_N = 3;
 
 /**
  * Main function
@@ -66,126 +20,51 @@ window.onload = function() {
 function calculateAnswer(event) {
   console.info("Calculating answer for input...");
   let assignment = document.getElementById(ASSIGNMENT).value;
-  let interpret_as_rps = document.getElementById(ALGORITHM_CHECKBOX).checked;
-  let answer = algorithm(assignment, interpret_as_rps);
+  let top3 = document.getElementById(ALGORITHM_CHECKBOX).checked;
+  let answer = algorithm(assignment, (top3)? TOP_N: 1);
 
   document.getElementById(ANSWER).innerText = answer;
 }
 
 /**
- * Calculate the answer to assignment.
+ * Calculate the answer to assignment1 with 2 variables, count and highest.
  * @param assignment the input from the assignment.
- * @return string the answer
+ * @param topn the
+ * @return string the elf with the highest calory count
  */
-function algorithm(assignment, interpret_as_rps) {
-    let errors = 0;
+function algorithm(assignment, topn) {
+    let currentCalorieScore = 0;
+    let highestCalorieScores = Array.from({length: topn}, () => (0));
+    let currentElf = 1;
+
     let lines = assignment.trim().split(NEWLINE_CHARACTER);
-    let score = 0;
     console.info("Linecount:" + lines.length);
 
-    for(let i=0; i<lines.length; i++) {
-        let rps_match = lines[i].replace(/\s/g, ''); // remove all whitespace
-        if(rps_match.length < 2) {
-            console.error(ERROR_MESSAGE_TOO_FEW_CHARACTERS_IN_LINE + i + ", skipped.");
-            errors++;
+    for(var i = 0; i < lines.length; i++){
+        let line = lines[i];
+
+        if(!line && currentCalorieScore > 0) { // Check for empty line and skip subsequent emptylines
+            console.debug("Calculated score for elf " + currentElf + ": " + currentCalorieScore);
+
+            for(let j=0; j < highestCalorieScores.length; j++) {
+                if(currentCalorieScore > highestCalorieScores[j]) {
+                    console.debug("New highest #"+(j+1) + " elf found, with score:" + currentCalorieScore);
+                    let oldHighestCalorieScore = highestCalorieScores[j];
+                    highestCalorieScores[j] = currentCalorieScore;
+                    currentCalorieScore = oldHighestCalorieScore;
+                }
+            }
+
+            // Reset values
+            currentCalorieScore = 0;
+            currentElf++;
             continue;
         }
-
-        // Assign characters from line
-        let opponent_hand = map_hand_character(rps_match[0]); 
-        let player_input = rps_match[1]; 
-        let player_hand = -1;
-
-        // Validate hand
-        if(opponent_hand<0) {
-            console.error(ERROR_MESSAGE_NO_SUCH_CHARACTER_IN_RPS + rps_match[0] + " for line: " + i);
-            errors++;
-            continue;
-        }
-
-        // How should we interpret input? match_option or Rock Paper Scissors.
-        if(interpret_as_rps) {
-            player_hand = interpret_player_hand_as_rps_input(player_input);
-        } else {
-            player_hand = interpret_player_hand_as_match_input(player_input, opponent_hand);
-        }
-
-        if(player_hand<0) { // Invalid input
-            console.error(ERROR_MESSAGE_NO_SUCH_CHARACTER_IN_RPS + rps_match[1] + " for line: " + i);
-            errors++;
-            continue;
-        }
-
-        score += rps_result(player_hand, opponent_hand);
+            
+        let calorieScore = parseInt(line);
+        currentCalorieScore += calorieScore;
     }
 
-    if(errors > 0) {
-        return errors.toString() + " Error(s) in input, see console for details."
-    }
-
-    return "Player score: " + score;
-}
-
-/**
- * Interpret given input for player as a rock paper scissor character.
- * @param char input the input for hand character (A,B,C,X,Y,Z)
- * @return the player hand character or -1 if invalid.
- */
-function interpret_player_hand_as_rps_input(input) {
-    return map_hand_character(input); 
-}
-
-/**
- * Interpret given input for player as a match option.
- * @param char input the input for match option (X,Y,Z)
- * @return the player hand character or -1 if invalid.
- */
-function interpret_player_hand_as_match_input(input, opponent_hand) {
-    let player_hand = -1;
-    switch (input) {
-        case OPTION_LOSE:
-            player_hand = RPS.losing_hand(opponent_hand);
-            break;
-        case OPTION_WIN:
-            player_hand = RPS.winning_hand(opponent_hand);
-            break;
-        case OPTION_TIE:
-            player_hand = opponent_hand;
-            break;
-    }
-
-    return player_hand;
-}
-
-/**
- * Maps the chosen hand character to 
- * @param hand_character the chosen character
- * @return RPS the rock paper scissor hand or -1 if invalid
- */
-function map_hand_character(hand_character) {
-    if(!(hand_character in RPS_ALIAS_MAP)) {
-        return -1;
-    }
-
-    return RPS_ALIAS_MAP[hand_character];
-}
-
-/**
- * Calculate the result of rock paper scissor match
- * @param RPS player_hand the player's choice
- * @param RPS opponent_hand the opponent's choice
- * @return score
- */
-function rps_result(player_hand, opponent_hand) {
-    let score = 0;
-    if(player_hand == opponent_hand) {
-        score = SCORE_TIE + player_hand;  // TIE
-    } else if(player_hand == RPS.winning_hand(opponent_hand)) {
-        score = SCORE_WIN + player_hand; // WIN
-    } else {
-        score = SCORE_LOSE + player_hand; // LOSE
-    }
-
-    console.debug("score:" + score + ", player: " + player_hand + ", opponent: " + opponent_hand);
-    return score;
+    console.debug(highestCalorieScores);
+    return "The highest of sum of calorie amount: " + highestCalorieScores.reduce(function(a, b) { return a + b; }, 0);
 }

style.css

@@ -9,6 +9,7 @@ body {
   textarea {
     display: block;
   }
+  
   #answer {
     color: purple
   }