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assignment
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assignment
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21
README.md
21
README.md
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# Advent of Code 2022 - Assignment5 javascript
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# Advent of Code - assignment 9 javascript
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This repository contains answers to the assignments of Advent of Coding 2022
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## References
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- https://www.w3schools.com/jsref/jsref_includes.asp
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- https://stackoverflow.com/questions/10261986/how-to-detect-string-which-contains-only-spaces
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- https://www.w3schools.com/jsref/jsref_indexof.asp
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- https://stackoverflow.com/questions/8073673/how-can-i-add-new-array-elements-at-the-beginning-of-an-array-in-javascript
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- https://stackoverflow.com/questions/966225/how-can-i-create-a-two-dimensional-array-in-javascript
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- https://www.w3schools.com/jsref/jsref_ceil.asp
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- https://stackoverflow.com/questions/30561056/console-log-a-multi-dimensional-array
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- https://teamtreehouse.com/community/removing-more-than-1-element-using-pop-and-shift-method
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- https://stackoverflow.com/questions/14723848/push-multiple-elements-to-array
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- https://betterprogramming.pub/tuples-in-javascript-57ede9b1c9d2
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- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/length
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- https://www.javascripttutorial.net/javascript-multidimensional-array/
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- https://flaviocopes.com/how-to-replace-whitespace-javascript/
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- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt
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- https://www.sohamkamani.com/javascript/enums/
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- https://www.w3schools.com/js/js_switch.asp
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- https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign
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- https://stackoverflow.com/questions/4564414/delete-first-character-of-string-if-it-is-0
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- https://stackoverflow.com/questions/1959040/is-it-possible-to-send-a-variable-number-of-arguments-to-a-javascript-function
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@@ -8,8 +8,6 @@
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<body>
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<p>Assignment:</p>
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<textarea rows="15" cols="50" id="assignment"></textarea>
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<input type="checkbox" id="algorithm"/>
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<label for="algorithm">All containers at once?</label>
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<p>Answer:</p>
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<div id="answer">Provide input first</div>
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274
script.js
274
script.js
@@ -1,10 +1,5 @@
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const ASSIGNMENT = 'assignment';
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const ANSWER = 'answer';
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const ALGORITHM_CHECKBOX = 'algorithm';
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const CONTAINER_NULL_CHARACTER=0;
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const INSTRUCTION_FROM='from';
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const INSTRUCTION_MOVE='move';
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const INSTRUCTION_TO='to';
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const NEWLINE_CHARACTER = '\n';
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/**
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@@ -12,18 +7,136 @@ const NEWLINE_CHARACTER = '\n';
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*/
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window.onload = function() {
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document.getElementById(ASSIGNMENT).addEventListener("input", calculateAnswer);
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document.getElementById(ALGORITHM_CHECKBOX).addEventListener("click", calculateAnswer);
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}
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const DIRECTIONS = {
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UP: 'U',
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DOWN: 'D',
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LEFT: 'L',
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RIGHT: 'R'
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};
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class Knot {
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constructor(x, y) {
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this.x=x;
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this.y=y;
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}
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}
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/*class Rope {
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constructor(headX, headY, tailX, tailY) {
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this.headX = headX;
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this.headY = headY;
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this.tailX = tailX;
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this.tailY = tailY;
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console.info("Created Rope with head:" + headX + "," + headY + " and tail: " + tailX + "," + tailY);
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}
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step = function (direction) {
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let oldHeadX = this.headX;
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let oldHeadY = this.headY;
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switch (direction) {
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case DIRECTIONS.UP:
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this.headY++;
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break;
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case DIRECTIONS.DOWN:
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this.headY--;
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break;
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case DIRECTIONS.LEFT:
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this.headX--;
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break;
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case DIRECTIONS.RIGHT:
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this.headX++;
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break;
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default:
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console.error("Invalid direction given: " + direction);
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}
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this.__correctTail(oldHeadX, oldHeadY);
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}
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getTailPosition = function () {
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return "" + this.tailX + "," + this.tailY;
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}
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__correctTail = function (oldHeadX, oldHeadY) {
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let absoluteDifferenceX = Math.abs(this.headX - this.tailX);
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let absoluteDifferenceY = Math.abs(this.headY - this.tailY);
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if (absoluteDifferenceX > 1 || absoluteDifferenceY > 1) {
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this.tailX = oldHeadX;
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this.tailY = oldHeadY;
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console.debug("Corrected tail Position: (" + this.tailX + ", " + this.tailY + "), head position: (" + this.headX + ", " + this.headY + ")");
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}
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}
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};*/
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class Rope {
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constructor(count) {
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if(count < 2) {
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console.error("Rope needs at least 2 knots.");
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return;
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}
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let knots = [];
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while(count > 0) {
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knots.push(new Knot(0,0));
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count--;
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}
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this.head = knots[0];
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this.knots = Array.from(knots).slice(1);
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this.tail = this.knots[this.knots.length-1];
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console.info("Created Rope with " + knots.length + " knots.");
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}
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step = function(direction) {
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let oldHeadX = this.head.x;
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let oldHeadY = this.head.y;
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switch(direction) {
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case DIRECTIONS.UP:
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this.head.y++;
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break;
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case DIRECTIONS.DOWN:
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this.head.y--;
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break;
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case DIRECTIONS.LEFT:
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this.head.x--;
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break;
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case DIRECTIONS.RIGHT:
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this.head.x++;
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break;
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default:
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console.error("Invalid direction given: " + direction);
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}
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this.__correctTails(oldHeadX, oldHeadY, this.head, this.knots[0], this.knots.slice(1));
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}
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getTailPosition = function() {
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return "" + this.tail.x + "," + this.tail.y;
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}
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__correctTails = function(oldHeadX, oldHeadY, head, tail, tails) {
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let absoluteDifferenceX = Math.abs(head.x - tail.x);
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let absoluteDifferenceY = Math.abs(head.y - tail.y);
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let oldTailX = tail.x;
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let oldTailY = tail.y;
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if(absoluteDifferenceX > 1 || absoluteDifferenceY > 1) {
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tail.x = oldHeadX;
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tail.y = oldHeadY;
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console.debug("Corrected tail Position: (" + this.tail.x + ", " + this.tail.y + "), head position: (" + this.head.x + ", " + this.head.y + ")");
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}
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if(tails.length > 0)
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this.__correctTails(oldTailX, oldTailY, tail, tails[0], tails.slice(1));
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}
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};
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/**
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* Listener function for input in assignment field.
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* @param event the onInput event
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*/
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function calculateAnswer(event) {
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console.info("Calculating answer for input...");
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let assignment = document.getElementById(ASSIGNMENT).value;
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let allAtOnce = document.getElementById(ALGORITHM_CHECKBOX).checked;
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let answer = algorithm(assignment, allAtOnce);
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let answer = algorithm(event.target.value);
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document.getElementById(ANSWER).innerText = answer;
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}
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@@ -31,137 +144,36 @@ function calculateAnswer(event) {
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/**
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* Calculate the answer to assignment.
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* @param assignment the input from the assignment.
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* @param allAtOnce should all containers be moved at once.
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* @return string the answer
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*/
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function algorithm(assignment, allAtOnce) {
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let lines = assignment.split(NEWLINE_CHARACTER);
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let containerPlan = Array.from({length:(lines[0].length+1)/4}, () => [])
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function algorithm(assignment) {
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let lines = assignment.trim().split(NEWLINE_CHARACTER);
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console.info("Linecount:" + lines.length);
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let parsec = true;
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let rope = new Rope(10);
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let visitedPositions = [rope.getTailPosition()];
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for(let i=0; i<lines.length; i++) {
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if(parsec) {
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let line = lines[i].replace(/\s/g, ''); // Remove all whitespace
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let direction = line[0];
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let count = parseInt(line.substring(1));
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if(isNaN(count)) { // Validate count
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console.error("Invalid number in line: " + lines[i]);
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}
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// Parse containers
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let containerLine = lines[i];
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while(count > 0) {
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rope.step(direction);
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let tailPosition = rope.getTailPosition();
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// Skip numbers
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if(containerLine[1] == '1') {
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parsec = false;
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i+=1;
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console.table(containerPlan);
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continue;
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}
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let containers = parseContainers(containerLine);
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if(containers == -1) {
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// invalid containerline
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// TODO: error
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console.error("Container parse failure.");
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continue;
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}
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// Add containers
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//console.debug(containers);
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for(let j=0; j<containers.length; j++) {
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let container = containers[j];
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//console.debug(container);
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if(container != CONTAINER_NULL_CHARACTER) {
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//console.debug(j);
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//console.debug(containerPlan);
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containerPlan[j].push(container);
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}
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}
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//console.table(containerPlan);
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} else {
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// Parse instructions
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let instructionLine = lines[i];
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let instruction = parseInstruction(instructionLine);
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console.debug(instruction);
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if(instruction == -1) {
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// invalid instructionline
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// TODO: error
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console.error("Instruction parse failure.");
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continue;
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}
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// Execute instruction
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let movecount=0;
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if(allAtOnce) {
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while(instruction.move > 0) {
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let container = containerPlan[instruction.from].shift();
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containerPlan[instruction.to].unshift(container);
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instruction.move--;
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movecount++;
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}
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console.debug("moved:" + movecount);
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} else {
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let splicedContainers = containerPlan[instruction.from].splice(0, instruction.move);
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containerPlan[instruction.to].unshift(...splicedContainers);
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}
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//console.table(containerPlan);
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}
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}
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let result="";
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for(let k=0; k<containerPlan.length; k++) {
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result += containerPlan[k][0];
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}
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return "Top containers on the stack are: " + result;
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}
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function parseInstruction(instructionLine) {
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let instruction={
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move:0,
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from:0,
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to:0,
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}
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instructionLine.replace(/\s/g, ''); // Remove whitespace
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let fromIndex = instructionLine.indexOf(INSTRUCTION_FROM);
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let moveIndex = instructionLine.indexOf(INSTRUCTION_MOVE);
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let toIndex = instructionLine.indexOf(INSTRUCTION_TO);
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// Validate
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if(fromIndex < 0 || moveIndex < 0 || toIndex < 0) {
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// Error
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return -1;
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}
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// TODO validate check for numbers after indices.
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// Parse
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instruction.move = parseInt(instructionLine.substring(moveIndex + INSTRUCTION_MOVE.length + 1, fromIndex));
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instruction.from = parseInt(instructionLine.substring(fromIndex + INSTRUCTION_FROM.length + 1, toIndex)) -1;
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instruction.to = parseInt(instructionLine.substring(toIndex + INSTRUCTION_TO.length + 1)) -1;
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return instruction;
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}
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function parseContainers(containerLine) {
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let containerLineLength = (containerLine.length+1);
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//console.debug("Parse ContainerLine, length: " + containerLineLength);
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if(!containerLine.includes('[') || !containerLine.includes(']') || containerLineLength % 4 != 0) {
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return -1;
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}
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let containers = [];
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for(let i=0; i<containerLineLength; i+=4) {
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let containerLineSubString = containerLine.substring(i, i+4).trim();
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let character = containerLineSubString[1];
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if(containerLineSubString[0] != '[' || containerLineSubString[2] != ']') {
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// Warning invalid container format
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// TODO: warning
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if(!visitedPositions.includes(tailPosition) ) { // Add only unique tailpositions
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visitedPositions.push(tailPosition);
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}
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containers.push((!character)? CONTAINER_NULL_CHARACTER: character);
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count--;
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}
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}
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//console.debug(containers);
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return containers;
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console.log(visitedPositions);
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return "Amount of positions for tail: " + visitedPositions.length;
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}
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Reference in New Issue
Block a user