Messy initial solution.

README.md

@@ -1,12 +1,13 @@
-# Advent of Code 2022 - Assignment3 javascript solution
-This problem is all about searching for duplicates in strings. The solution is implemented using slice to split the string in half. 
-The priority is retrieved using the ASCII charcode character for convienence. How to retrieve inputs differs between part1 and 2, therefore a checkbox is provided to toggle between different parsing methods.
+# Advent of Code 2022 - Assignment5 javascript
+This repository contains answers to the assignments of Advent of Coding 2022
 
 ## References
-- https://stackoverflow.com/questions/94037/convert-character-to-ascii-code-in-javascript
-- https://stackoverflow.com/questions/20474257/split-string-into-two-parts
-- https://www.folkstalk.com/2022/10/find-common-characters-in-two-strings-javascript-with-code-examples.html
-- https://stackoverflow.com/questions/351409/how-to-append-something-to-an-array
-- https://stackoverflow.com/questions/9862761/how-to-check-if-character-is-a-letter-in-javascript
-- https://stackoverflow.com/questions/1966476/how-can-i-process-each-letter-of-text-using-javascript
-- https://www.w3schools.com/js/js_arrays.asp
+- https://www.w3schools.com/jsref/jsref_includes.asp
+- https://stackoverflow.com/questions/10261986/how-to-detect-string-which-contains-only-spaces
+- https://www.w3schools.com/jsref/jsref_indexof.asp
+- https://stackoverflow.com/questions/8073673/how-can-i-add-new-array-elements-at-the-beginning-of-an-array-in-javascript
+- https://stackoverflow.com/questions/966225/how-can-i-create-a-two-dimensional-array-in-javascript
+- https://www.w3schools.com/jsref/jsref_ceil.asp
+- https://stackoverflow.com/questions/30561056/console-log-a-multi-dimensional-array
+- https://teamtreehouse.com/community/removing-more-than-1-element-using-pop-and-shift-method
+- https://stackoverflow.com/questions/14723848/push-multiple-elements-to-array

index.html

@@ -9,7 +9,7 @@
     <p>Assignment:</p>
     <textarea rows="15" cols="50" id="assignment"></textarea>
     <input type="checkbox" id="algorithm"/>
-    <label for="algorithm">Solution by compartiment.</label> 
+    <label for="algorithm">All containers at once?</label>
 
     <p>Answer:</p>
     <div id="answer">Provide input first</div>

script.js

@@ -1,10 +1,10 @@
 const ASSIGNMENT = 'assignment';
 const ANSWER = 'answer';
 const ALGORITHM_CHECKBOX = 'algorithm';
-const CHARCODE_START=64;
-const CHARCODE_UPPER_CORRECTION=6;
-const ERROR_MESSAGE_INVALID_INPUT_SIZE = "Invalid input size, should be higher than 2 for: ";
-const ERROR_MESSAGE_INVALID_ITEM_CHARACTER = "Invalid item character found: ";
+const CONTAINER_NULL_CHARACTER=0;
+const INSTRUCTION_FROM='from';
+const INSTRUCTION_MOVE='move';
+const INSTRUCTION_TO='to';
 const NEWLINE_CHARACTER = '\n';
 
 /**
@@ -22,8 +22,8 @@ window.onload = function() {
 function calculateAnswer(event) {
   console.info("Calculating answer for input...");
   let assignment = document.getElementById(ASSIGNMENT).value;
-  let byCompartiments = document.getElementById(ALGORITHM_CHECKBOX).checked;
-  let answer = algorithm(assignment, byCompartiments);
+  let allAtOnce = document.getElementById(ALGORITHM_CHECKBOX).checked;
+  let answer = algorithm(assignment, allAtOnce);
 
   document.getElementById(ANSWER).innerText = answer;
 }
@@ -31,123 +31,137 @@ function calculateAnswer(event) {
 /**
  * Calculate the answer to assignment.
  * @param assignment the input from the assignment.
+ * @param allAtOnce should all containers be moved at once.
  * @return string the answer
  */
-function algorithm(assignment, byCompartiments) {
-    let priorityScoreSum = 0;
-    let lines = assignment.trim().split(NEWLINE_CHARACTER);
-    console.info("Linecount:" + lines.length);
-
-    let increment = (byCompartiments)? 1:3;
-    for(let i=0; i<lines.length; i+=increment) {
-        let inputs = [];
-        let rucksack = lines[i].replace(/\s/g, ''); // Remove whitespace
-
-        if(byCompartiments) {
-            let compartiment1 = rucksack.slice(0, rucksack.length/2);
-            let compartiment2 = rucksack.slice(rucksack.length/2);
-            inputs = [compartiment1, compartiment2];
-        } else {
-            inputs = [rucksack, lines[i+1].replace(/\s/g, ''), lines[i+2].replace(/\s/g, '')];
-        }
-
-        let duplicate = getDuplicateCharacter(inputs);
-        if(duplicate < 0) {
-            console.error(ERROR_MESSAGE_INVALID_INPUT_SIZE + inputs + " on line: " + i);
-        }
-
-        let priorityScore = getPriorityScore(duplicate);
-        if(priorityScore < 0) {
-            console.error(ERROR_MESSAGE_INVALID_ITEM_CHARACTER + duplicate + " on line: " + i);
-            continue;
-        }
-        priorityScoreSum += priorityScore;
-    }
-
-    return "SUM priorityscore: " + priorityScoreSum;
-}
-
-/**
- * Calculate the answer to assignment.
- * @param assignment the input from the assignment.
- * @return string the answer
- */
- function algorithm1(assignment) {
-    let priorityScoreSum = 0;
-    let lines = assignment.trim().split(NEWLINE_CHARACTER);
+function algorithm(assignment, allAtOnce) {
+    let lines = assignment.split(NEWLINE_CHARACTER);
+    let containerPlan = Array.from({length:(lines[0].length+1)/4}, () => [])
     console.info("Linecount:" + lines.length);
 
+    let parsec = true;
     for(let i=0; i<lines.length; i++) {
-        let rucksack = lines[i].replace(/\s/g, ''); // Remove whitespace
-        let compartiment1 = rucksack.slice(0, rucksack.length/2);
-        let compartiment2 = rucksack.slice(rucksack.length/2);
+        if(parsec) {
 
-        console.debug("Check rucksack" + i, ": " + rucksack + " \n with compartiment1: " + compartiment1 + "\n and compartiment2: " + compartiment2);
-        
-        for(item of compartiment2) {
-            if(compartiment1.includes(item)) {
-                console.debug("Found duplicate: " + item + " in rucksack" + i);
-                let priorityScore = getPriorityScore(item);
-                if(priorityScore < 0) {
-                    console.error(ERROR_MESSAGE_INVALID_ITEM_CHARACTER + item + " on line: " + i);
-                    continue;
-                }
-                priorityScoreSum += priorityScore;
-                break;
+            // Parse containers
+            let containerLine = lines[i];
+
+            // Skip numbers
+            if(containerLine[1] == '1') {
+                parsec = false;
+                i+=1;
+                console.table(containerPlan);
+                continue;
             }
+
+            let containers = parseContainers(containerLine);
+            if(containers == -1) {
+                // invalid containerline
+                // TODO: error
+                console.error("Container parse failure.");
+                continue;
+            }
+
+            // Add containers
+            //console.debug(containers);
+            for(let j=0; j<containers.length; j++) {
+                let container = containers[j];
+                //console.debug(container);
+                if(container != CONTAINER_NULL_CHARACTER) {
+                    //console.debug(j);
+                    //console.debug(containerPlan);
+                    containerPlan[j].push(container);
+                }
+            }
+            //console.table(containerPlan);
+        } else {
+            // Parse instructions
+            let instructionLine = lines[i];
+            let instruction = parseInstruction(instructionLine);
+
+            console.debug(instruction);
+            if(instruction == -1) {
+                // invalid instructionline
+                // TODO: error
+                console.error("Instruction parse failure.");
+                continue;
+            }
+
+            // Execute instruction
+            let movecount=0;
+            if(allAtOnce) {
+                while(instruction.move > 0) {
+                    let container = containerPlan[instruction.from].shift();
+                    containerPlan[instruction.to].unshift(container);
+                    instruction.move--;
+                    movecount++;
+                }
+                console.debug("moved:" + movecount);
+            } else {
+                let splicedContainers = containerPlan[instruction.from].splice(0, instruction.move);
+                containerPlan[instruction.to].unshift(...splicedContainers);
+            }
+
+            //console.table(containerPlan);
         }
     }
 
-    return "SUM priorityscore: " + priorityScoreSum;
+    let result="";
+    for(let k=0; k<containerPlan.length; k++) {
+        result += containerPlan[k][0];
+    }
+
+    return "Top containers on the stack are: " + result;
 }
 
-/**
- * Find duplicate character in inputs.
- * @param string[] inputs the inputs to find duplicates in. 
- * @return char the duplicate character
- */
-function getDuplicateCharacter(inputs) {
-    console.debug("Checking inputs: " + inputs);
-    if(inputs.length < 2) {
+function parseInstruction(instructionLine) {
+    let instruction={
+        move:0,
+        from:0,
+        to:0,
+    }
+
+    instructionLine.replace(/\s/g, ''); // Remove whitespace
+    let fromIndex = instructionLine.indexOf(INSTRUCTION_FROM);
+    let moveIndex = instructionLine.indexOf(INSTRUCTION_MOVE);
+    let toIndex = instructionLine.indexOf(INSTRUCTION_TO);
+
+    // Validate
+    if(fromIndex < 0 || moveIndex < 0 || toIndex < 0) {
+        // Error
         return -1;
     }
 
-    for(let item of inputs[0]) {
-        let duplicate = true
-        for(let j=1; j<inputs.length; j++) {
-            duplicate = duplicate && inputs[j].includes(item);
-        }
+    // TODO validate check for numbers after indices.
 
-        if(duplicate) {
-            console.debug("Found duplicate: " + item);
-            return item;
-        }
-    }
+    // Parse
+    instruction.move = parseInt(instructionLine.substring(moveIndex + INSTRUCTION_MOVE.length + 1, fromIndex));
+    instruction.from = parseInt(instructionLine.substring(fromIndex + INSTRUCTION_FROM.length + 1, toIndex)) -1;
+    instruction.to = parseInt(instructionLine.substring(toIndex + INSTRUCTION_TO.length + 1)) -1;
+
+    return instruction;
 }
 
-/**
- * Returns priorityscore for given character.
- * @param char character the character
- * @return int the priorityscore for character or -1 if invalid 
- */
-function getPriorityScore(character) {
-    let result=0;
-    let uppercase = character.toUpperCase();
-    let lowercase = character.toLowerCase();
-    
-    // validate character
-    if( uppercase == lowercase ) {
+function parseContainers(containerLine) {
+    let containerLineLength = (containerLine.length+1);
+    //console.debug("Parse ContainerLine, length: " + containerLineLength);
+
+    if(!containerLine.includes('[') || !containerLine.includes(']') || containerLineLength % 4 != 0) {
         return -1;
     }
-    
-    if(character == uppercase) { // Switch results for upper and lowercase characters
-        result -= CHARCODE_UPPER_CORRECTION;
-        character = lowercase;
-    } else {
-        character = uppercase;
+
+    let containers = [];
+    for(let i=0; i<containerLineLength; i+=4) {
+        let containerLineSubString = containerLine.substring(i, i+4).trim();
+        let character = containerLineSubString[1];
+        if(containerLineSubString[0] != '[' || containerLineSubString[2] != ']') {
+                // Warning invalid container format
+                // TODO: warning
+        }
+
+        containers.push((!character)? CONTAINER_NULL_CHARACTER: character);
     }
+    //console.debug(containers);
 
-    result += character.charCodeAt() - CHARCODE_START;
-
-    return result;
+    return containers;
 }